CN100547660C - Be used to reproduce the method and apparatus of the data of super resolution information storage medium - Google Patents
Be used to reproduce the method and apparatus of the data of super resolution information storage medium Download PDFInfo
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- CN100547660C CN100547660C CNB2005800219291A CN200580021929A CN100547660C CN 100547660 C CN100547660 C CN 100547660C CN B2005800219291 A CNB2005800219291 A CN B2005800219291A CN 200580021929 A CN200580021929 A CN 200580021929A CN 100547660 C CN100547660 C CN 100547660C
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
- B24D13/10—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
Abstract
Provide a kind of reproduction to have method and the equipment thereof that is recorded in the data in the super resolution information storage medium less than the form of the mark of the size of the resolution characteristic of incident beam.Described data reproducing method comprises: will have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium; Detection is based on first reproducing signal of first light beam with based on second reproducing signal of second light beam; Compensate and calculate the time delay between first reproducing signal and second reproducing signal.Therefore, can be excluded from the signal of the external zones of the reconstruction beam point except super-resolution district reflection, thereby improve the reproducing signal characteristic.
Description
Technical field
The present invention relates to the method and apparatus that a kind of reproduction is recorded in the data on the super resolution information storage medium, more particularly, relate to the method and apparatus that a kind of like this reproduction is recorded in the data on the super resolution information storage medium, it can improve playback signal characteristic by removing intersymbol interference (ISI) from super resolution information storage medium.
Background technology
Optical record medium is used as in the noncontact mode and writes down and/or the information storage medium of the optical pickup apparatus of information reproduction.Along with the progress of industry development, be badly in need of information recording carrier with bigger recording density.Therefore, develop less than the optical record medium of the record mark of laser beam spot utilizing the super-resolution phenomenon to reproduce spot diameter.
Usually, be λ when being used to reproduce the light wavelength that is recorded in the data on the recording medium, when the numerical aperture of object lens was NA, the limit that can reproduce resolution became λ/4NA.In other words, owing to the light that goes out from light emitted can not be distinguished diameter with other record marks less than the record mark of λ/4NA mutually, therefore such data often can not be reproduced.
Yet the record mark that surpasses such resolving power limit can be reproduced, and this is called as the super-resolution phenomenon.Nowadays, carrying out to the causal investigation of super-resolution phenomenon and to the research and development of super-resolution phenomenon.Because the super-resolution phenomenon makes can be reproduced above the record mark of resolving power limit, so super resolution information storage medium can satisfy the demand to high density and large storage capacity significantly.
The necessary condition that the commerce of super resolution information storage medium is used is that information storage medium satisfies master record and the reproducing characteristic as storage medium.Specifically, compare with conventional information storage media, the super resolution information storage medium utilization has the writing light beam and the reconstruction beam of high relatively power.In addition, the subject matter of super resolution information storage medium is the realization of reproducing signal characteristic (as carrier-to-noise ratio (CNR), shake or RF signal) and stable reproducing signal.In order to realize super resolution information storage medium, for super resolution information storage medium, condition precedent is to satisfy the reproducing signal characteristic.
Now, with reference to Fig. 1 the district that the reconstruction beam point of super-resolution phenomenon takes place on the super-resolution information recording carrier is described.
As shown in fig. 1, mark 110 is recorded on the track 100 of super resolution information storage medium, since the difference of local light intensity, the change of occurrence temperature distribution or optical characteristics in the light beam spot 120 on dropping on the super-resolution layer.Therefore, also can be reproduced above the mark 110 of resolving power limit.In other words, the change of Temperature Distribution or optical characteristics occurs in the subregion of light beam spot 120, and does not change at external zones 140 places of described subregion.As shown in fig. 1, the described subregion that changes (below, will be called as super-resolution district 130) can be core.The district that the change of optical characteristics takes place can be continuous or replace.
In fact, there are many reports to point out, utilize various super-resolution materials to reproduce operation, obtained the enough big CNR that can be applied to real medium from the mark that has less than the equal length of resolution characteristic by super-resolution.Yet, actual optical recording is not to carry out by writing down the mark with equal length at regular intervals, but the mark by having equal length with irregular interval record (promptly, the mark position detection method) or carry out by the mark (that is mark lengths detection method) that has different length with irregular interval record.Specifically, in CD or DVD, the mark with all lengths in 3T to 11T (here, T the represents clock frequency) scope is by compound record.Yet, above-mentioned super resolution technology is not all having successfully aspect this composite signal of reproduction, this is because not only comprise the signal of district's reflection of the light beam spot that changes from optical characteristics from the signal of reflective optical recording media, and comprises from the signal of the external zones reflection in the described district that optical characteristics changes.If there is no from the signal of described external zones, then the size of efficient beam point is fully reduced, thereby can reproduce composite signal.Yet in above-mentioned super resolution technology, district that optical characteristics changes and the difference between the external zones are used, because described difference is very little, so become the obstruction that the luminous point size reduces from the signal of external zones reflection.The ISI (intersymbol interference) that this takes place when causing reproducing a succession of mark, thus can not reproduce composite signal with high resolving power.
Fig. 2 A illustrates the record pattern of the mark that is recorded on the information storage medium, and Fig. 2 B illustrates and the corresponding RF signal of the reproduction mark of the record pattern shown in Fig. 2 A.When the wavelength of laser beam is 405nm, its NA is 0.85, and its resolution characteristic is when being about 75nm, and the record pattern is based on the combination of the blank between the mark of the mark of about 75nm (less than resolution characteristic), about 300nm (greater than resolution characteristic) and two marks.In the reproducing signal shown in Fig. 2 B, when the long mark of 300nm or blank appeared at around the light beam spot, the long mark of 75nm was subjected to long mark of 300nm and blank influence, thereby can not clearly detect the long mark of 75nm.District with the long mark of 75nm is represented by A, B, C, D, E and F.With reference to Fig. 2 A and Fig. 2 B, the level of the reproducing signal of district A, B, C, D, E and F is according to the long mark of 75nm and blank quantity and different.In addition, the level of the reproducing signal of district A, B, C, D, E and F is not constant, but can be dependent on the environmental conditions of the long mark of 75nm and change.
Disclosure of the Invention
Technical matters
Owing to the ISI from the signal of the external zones 140 of light beam spot causes the problems referred to above.
Technical solution
According to an aspect of the present invention, carried a kind of method and apparatus, when reconstruction beam shines on the super resolution information storage medium, this method and apparatus accurately reproduces the data of record and prevents intersymbol interference (ISI) by the reproducing signal of removal from the external zones in super-resolution district, wherein, the change of occurrence temperature distribution or optical characteristics in described super-resolution district.
Useful effect
According to the present invention, when the pre-pit except user data (pre-pit) or additional identification information are recorded, reproduce the required time of pre-pit or identifying information and can be used as time delay by the difference of reproducing the required time of pre-pit or identifying information at the back light beam by light beam formerly.
In the data reproducing method of according to an aspect of the present invention super resolution information storage medium, as mentioned above, when reproducing the data that write down with mark pattern, component of signal from the external zones except the super-resolution district is removed, thereby raising playback signal characteristic, wherein, in described super-resolution district, has the reconstruction beam of high relatively power and occurrence temperature distributes or the change of optical characteristics by irradiation.In addition, the method for using a kind of control time to postpone is accurately controlled the distance between the luminous point, thereby obtains more accurate reproducing signal.These methods can be improved the characteristic that is recorded in the signal that the data in the random patterns obtain by reproduction, thereby help to improve the practicality of super resolution information storage medium.
In addition, the data reproducing equipment of super resolution information storage medium according to an aspect of the present invention can improve the reproducing signal characteristic by processing signals simply, and does not need existing reproducer is carried out very big change.
Use according to an aspect of the present invention data reproducing method and the equipment data reproduction performance of having improved super resolution information storage medium, thereby realized the practical application of high-quality, high density, high content information storage medium.
Description of drawings
Fig. 1 is illustrated in the district of the reconstruction beam point place generation super-resolution phenomenon that shines on the super resolution information storage medium;
Fig. 2 A illustrates the record pattern, has write down to have less than the mark of the size of the resolution characteristic of the reconstruction beam of super-resolution power and have mark greater than the size of described resolution characteristic in this record pattern;
The reconstruction beam that Fig. 2 B illustrates by utilizing super-resolution power reproduces the RF signal that the information in the record pattern that is recorded in Fig. 2 A obtains;
Fig. 3 is the sectional view of the example of the schematically illustrated super resolution information storage medium that reproducting method was applied to according to an aspect of the present invention;
Fig. 4 is illustrated in super-resolution power optical beam and the non-super-resolution power optical beam that shines in the data reproducing method according to the embodiment of the invention on the information storage medium;
Fig. 5 A and Fig. 5 B are the enlarged drawings that shines the beam area of super-resolution power optical beam on the information storage medium and non-super-resolution power optical beam in the data reproducing method according to the embodiment of the invention;
Fig. 6 A illustrates data reproducing method by according to an aspect of the present invention and the super-resolution power optical beam is shone the reproducing signal that obtains in the mark in the record pattern that is recorded in shown in Fig. 2 A;
Fig. 6 B illustrates data reproducing method by according to an aspect of the present invention and non-super-resolution power optical beam is shone the reproducing signal that obtains in the mark in the record pattern that is recorded in shown in Fig. 2 A;
Fig. 6 C illustrates the difference signal between the reproducing signal shown in Fig. 6 A and Fig. 6 B;
The data reproducing method that Fig. 7 A illustrates by according to an aspect of the present invention shines the super-resolution power optical beam reproducing signal that obtains in the mark of recorded at random;
The data reproducing method that Fig. 7 B illustrates by according to an aspect of the present invention shines the reproducing signal that obtains in the mark of recorded at random with non-super-resolution power optical beam;
Fig. 7 C illustrates the difference signal between the reproducing signal shown in Fig. 7 A and Fig. 7 B;
Fig. 8 illustrates the eye pattern that obtains from the difference signal shown in Fig. 7 C;
The schematically illustrated data reproducing equipment that is used for super resolution information storage medium of Fig. 9 A according to the embodiment of the invention;
Fig. 9 B illustrates the type optical grating element that glitters according to the embodiment of the invention;
The modification of the data reproducing equipment of the schematically illustrated Fig. 9 A of Figure 10;
Figure 11 is the process flow diagram that illustrates according to the data reproducing method of the embodiment of the invention;
Figure 12 illustrates by the shake of the signal after carrying out subtraction according to time delay being carried out the result's that emulation obtains curve map;
Figure 13 illustrates the calculating of first time delay of using in the reproducting method of Figure 11;
Figure 14 illustrates the modification of recoding/reproduction signal processor of the data reproducing equipment of Fig. 9 A or Figure 10, and the signal of modification utilizes jitter value to carry out compensation;
Figure 15 is that the jitter value that utilizes that illustrates according to the embodiment of the invention compensates the process flow diagram of the method for the time delay between first light beam and second light beam;
Figure 16 illustrates has the super resolution information storage medium that generates the track of pre-pit in its fate;
Figure 17 illustrates the process flow diagram that utilizes pre-pit or identifying information to compensate the method for the time delay between first light beam and second light beam according to another embodiment of the present invention.
Best mode
According to an aspect of the present invention, provide a kind of reproduction to be recorded in the method for the data in the super resolution information storage medium with the mark less than the size of the resolution characteristic of incident beam, this method comprises: will have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium; Detection is based on first reproducing signal of first light beam with based on second reproducing signal of second light beam; Compensate and calculate the time delay between first reproducing signal and second reproducing signal.
According to a further aspect in the invention, described calculating operation can comprise: obtain the difference signal between first reproducing signal and second reproducing signal.First light beam and second light beam can shine on the same track with time delay.
According to a further aspect in the invention, described irradiation operation can comprise: utilize diffraction element will be divided into first light beam and second light beam from the light beam that single source is launched.The operation of dividing the light beam launch from single source, in a plurality of diffracted beams that generate by diffraction element+k order diffraction light beam can be used as first light beam, and-k order diffraction light beam can be used as second light beam.Alternatively, in a plurality of diffracted beams that generate by diffraction element-k order diffraction light beam can be used as first light beam, and+k order diffraction light beam can be used as second light beam.Described diffraction element can be the type optical grating element that glitters.
According to a further aspect in the invention, described irradiation operation can comprise: launch first light beam and second light beam respectively from the independently light source that comprises first light source and secondary light source.
According to a further aspect in the invention, provide a kind of reproduction to have the method that is recorded in the data in the super resolution information storage medium less than the form of the mark of the size of the resolution characteristic of incident beam, this method comprises: first light beam irradiates that will have super-resolution power is in information storage medium; A plurality of second light beam irradiates that postpone to have non-super-resolution power with preset time are to by on the information storage medium of first light beam irradiates; Detect final reproducing signal based on first reproducing signal of first light beam and second reproducing signal of second light beam.
According to a further aspect in the invention, described detecting operation can comprise: obtain the difference signal between first reproducing signal and second reproducing signal.
According to a further aspect in the invention, described detecting operation also can comprise: compensate the time delay between first reproducing signal and second reproducing signal.Alternatively, described detecting operation also can comprise: the compensation preset time postpones so that the shake or the bER minimum of final reproducing signal.Alternatively, described detecting operation also can comprise: utilize to use first light beam to reproduce the required time of the pre-pit of making user data of no use or identifying information and compensate preset time with the difference of using second light beam to reproduce the required time of described pre-pit or identifying information and postpone.Alternatively, described detecting operation also can comprise: utilize swinging signal to compensate preset time and postpone.
According to a further aspect in the invention, provide a kind of reproduction to have the equipment that is recorded in the data in the super resolution information storage medium less than the form of the mark of the size of the resolution characteristic of incident beam, described equipment comprises: optical pickup apparatus will have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium; Signal processor detects first reproducing signal of first light beam and second reproducing signal of second light beam, compensates the time delay between first reproducing signal and second reproducing signal, union first reproducing signal and second reproducing signal; Controller utilizes from the signal of signal processor reception and controls optical pickup apparatus.
According to a further aspect in the invention, provide a kind of reproduction to have the equipment that is recorded in the data in the super resolution information storage medium less than the form of the mark of the size of the resolution characteristic of incident beam, this equipment comprises: optical pickup apparatus, with first light beam irradiates of super-resolution power in information storage medium, and with a plurality of second light beam irradiates of non-super-resolution power to by in the district on the information storage medium of first light beam irradiates; Signal processor detects final reproducing signal based on first reproducing signal of first light beam and second reproducing signal of second light beam; Controller utilizes from the signal of signal processor reception and controls optical pickup apparatus.
Embodiment
Now, will describe exemplary embodiment of the present invention in detail, its example is shown in the drawings, and in the accompanying drawings, identical label is represented identical parts all the time.Below, embodiment is described with reference to the accompanying drawings to explain the present invention.
Data reproducing method according to an aspect of the present invention is applicable to super resolution information storage medium, and it is configured to reproduce the information that has above in the record mark of the size of resolving power limit that is recorded in.
Before the data reproducing method of explaining in detail according to an aspect of the present invention, at first exemplary super resolution information storage medium will be described.
With reference to Fig. 3, super resolution information storage medium comprises substrate 310 and is formed on first dielectric layer 320 in the substrate 310, recording layer 330, second dielectric layer 340, super-resolution in turn and reproduces layer the 350, the 3rd dielectric layer 360 and overlayer 370.Here, the light beam that uses in the recoding/reproduction information process is focused on the object lens (OL), and incides on the super resolution information storage medium through overlayer 370.
The optics and/or the thermal characteristics of first to the 3rd dielectric layer 320,340 and 360 control super resolution information storage mediums.Overlayer 370 covers comprise recording layer 330 and the super-resolution that are formed in the substrate 310 and reproduces the layer of layer 350.Here, first to the 3rd dielectric layer 320,340 and 360 and overlayer 370 be not the requisite ingredient of super resolution information storage medium.Certainly, even do not form these layers in super resolution information storage medium, information also can be reproduced.
First to the 3rd dielectric layer 320,340 and 360 best (but optionally) is made by at least a material of selecting from the group of being made up of oxide, nitride, carbonide, sulfide and fluoride.In other words, first to the 3rd dielectric layer 320,340 and 360 best (but optionally) is from by monox (SiO
x), magnesium oxide (MgO
x), aluminium oxide (AlO
x), titanium dioxide (TiO
x), vanadium oxide (VO
x), chromium oxide (CrO
x), nickel oxide (NiO
x), zirconia (ZrO
x), germanium oxide (GeO
x), zinc paste (ZnO
x), silicon nitride (SiN
x), aluminium nitride (AlN
x), titanium nitride (TiN
x), zirconium nitride (ZrN
x), germanium nitride (GeN
x), the compound (ZnS-SiO) and the magnesium fluoride (MgF of silit (SiC), zinc sulphide (ZnS), zinc sulphide-monox
2) at least a material selected in the group formed.
Recording layer 330 has such structure: the record mark (m) of the incident beam record by having the booking situation power level have the square-section or with the essentially identical cross section of rectangular shape.Here, record mark (m) comprises the mark of the size with the resolution characteristic that is not more than the optical pickup apparatus that is used to reproduce.
In order repeatedly to utilize the super-resolution phenomenon to reproduce data, the chemical reaction temperature Tw of recording layer 330 is higher than super-resolution and reproduces the temperature T r that the super-resolution phenomenon takes place layer 350.
Therefore, in order to generate record mark (m), recording layer 330 must have single layer structure, and this single layer structure has two or more mixtures of material, described two or more materials have different physical characteristicss and chemically reactive (for example, materials A among Fig. 3 and B) each other under predetermined temperature.
For example, before data recording, promptly before the chemical reaction between materials A and the B, recording layer 330 exists with the form that materials A and B are blended in film wherein.When the writing light beam with predetermined power level shines on the recording layer 330, at the regional generating material A that light beam spot dropped on of recording layer 330 and the chemical reaction between the B, and the state of recording layer is changed into compd A+B from the potpourri of materials A and B, and this compd A+B has the physical characteristics of the potpourri that is different from materials A and B.Compd A+B generates record mark (m), and this record mark (m) has the reflectivity that is different from the record mark in other zones.
The example of materials A comprises tungsten (W), the example of material B comprises silicon (Si), this is based on the following fact: adopting Ge-Sb-Te to reproduce as super-resolution under the situation of material of layer, at reproduction period, the super-resolution phenomenon occurs in about 350 ℃, and record must carried out than reproducing under the high record temperature of temperature.In other words, the W-Si alloy has about 600 ℃ temperature of reaction, and it is not subjected to the influence of reproducing power.
When selecting W and Si, best (but optionally) by mixing these two kinds of materials so that the ratio of the quantity of W atom and the quantity of Si atom is 1 to 2 to form recording layer 330.In this case, the chemical reaction that takes place of the presumptive area place of the recording layer that light beam shone 330 by having recording power generates WSi
2Compound.The ratio of the quantity of W above-mentioned and Si atom, promptly 1: 2 only is to illustrate for example, described ratio is not limited thereto.
Although W and Si are described to the material of recording layer, but these two kinds of materials only are to illustrate for example, can be in the scope that can utilize the laser beam executive logging from by selecting two or more materials arbitrarily the group that the material of chemically reactive is formed under being higher than the temperature of reproducing temperature.For example, recording layer can comprise at least two kinds of materials selecting from the group of being made up of vanadium (V), chromium (Cr), cobalt (Co), nickel (Ni), copper (Cu), germanium (Ge), niobium (Nb), molybdenum (Mo), silver (Ag), tin (Sn), antimony (Sb), tellurium (Te), titanium (Ti), zirconium (Zr) and lanthanum base element.
It is layers of being made by phase-change material that super-resolution is reproduced layer 350, and this phase-change material stands the change of Temperature Distribution or optical characteristics in some location of incident beam point.In other words, super-resolution is reproduced 350 best (but optionally) of layer and is formed by chalcogenide (chalcogenide) phase-change material, and described phase-change material comprises select at least a from the group of being made up of sulphur (S), selenium (Se), tellurium (Te).For example, super-resolution is reproduced layer 350 and is comprised: from by selenium-sulphur (Se-S), selenium-tellurium (Se-Te), sulphur-tellurium (S-Te), phosphorus-sulphur (P-S), phosphorus-tellurium (P-Te), phosphorus-selenium (P-Se), arsenic-sulphur (As-S), arsenic-selenium (As-Se), arsenic-tellurium (As-Te), antimony-sulphur (Sb-S), antimony-selenium (Sb-Se), antimony-tellurium (Sb-Te), silicon-sulphur (Si-S), silicon-selenium (Si-Se), silicon-tellurium (Si-Te), germanium-sulphur (Ge-S), germanium-selenium (Ge-Se), germanium-tellurium (Ge-Te), tin-sulphur (Sn-S), tin-selenium (Sn-Se), tin-tellurium (Sn-Te), silver-sulphur (Ag-S), silver-selenium (Ag-Se), silver-tellurium (Ag-Te), aluminium-sulphur (Al-S), aluminium-selenium (Al-Se), aluminium-tellurium (Al-Te), gallium-sulphur (Ga-S), gallium-selenium (Ga-Se), gallium-tellurium (Ga-Te), indium-sulphur (In-S), indium-selenium (In-Se), that selects in the group that indium-tellurium (In-Te) based compound is formed is at least a; And comprise at least a compound of from form by these elements described group, selecting.
Best (but optionally), super-resolution is reproduced layer 350 by making based on the phase-change material of germanium-antimony-tellurium (Ge-Sb-Te) or silver-indium-antimony-tellurium (Ag-In-Sb-Te).
Therefore, super-resolution is reproduced floor 350 and is created the super-resolution district, at this place, super-resolution district, under predetermined temperature since phase transformation and in some zones at light beam spot occurrence temperature distribute or the change of optical characteristics, thereby can recover to have information less than the form record of the record mark (m) of the size of resolution characteristic.
As mentioned above, the super-resolution district of the change of occurrence temperature distribution or optical characteristics is created in some location of reconstruction beam point by reconstruction beam, and it may be present in the core of light beam spot.
Above-mentioned information storage medium only is illustrating the super-resolution phenomenon.Say that more rightly reproducting method according to an aspect of the present invention can adopt the information storage medium of any kind that stands the super-resolution phenomenon.
Now, with the data reproducing method of describing according to the information storage medium of the embodiment of the invention.
In the data reproducing method of according to an aspect of the present invention information storage medium, as shown in Figure 4, the first light beam B1 with high relatively power shines in the information storage medium with the second light beam B2 with relative low power.Record mark (m) is recorded along the track (T) of information storage medium, and the first light beam B1 and the second light beam B2 shine in the diverse location of same rail.
Can generate the first light beam B1 and the second light beam B2 by two light sources of the light beam that utilizes beam splitter to divide to launch from single source or the light beam by emission different capacity level.Described beam splitter can be an optical grating element or such as the diffraction element of hologram.
The first light beam B1 has the reproducing power (being called as super-resolution power) that the super-resolution phenomenon takes place, and the second light beam B2 has the reproducing power (being called as non-super-resolution power) that the super-resolution phenomenon does not take place.The first light beam B 1 and the second light beam B2 are shone simultaneously.
As shown in Fig. 5 A, in the zone that the first light beam B1 is shone, the change of occurrence temperature distribution or optical characteristics in some districts of luminous point, thus form the super-resolution district that the super-resolution phenomenon takes place.In the external zones in super-resolution district, the super-resolution phenomenon does not take place.Shown in Fig. 5 B, the super-resolution phenomenon does not take place in the location of being shone at the second light beam B2.
When the wavelength of the first light beam B1 is λ, when its numerical aperture was NA1, the resolution characteristic of the first light beam B1 was λ/(4 * NA1).When obtain the first light beam B1 and the second light beam B2 with single source, the wavelength of the second light beam B2 is identical with the wavelength of the first light beam B1, i.e. when λ, and its numerical aperture was NA2, the resolution characteristic of the second light beam B2 was λ/(4 * NA2).The numerical aperture of light beam is defined as the value that obtains divided by the focal length of object lens by with the radius of light beam.An aspect of of the present present invention is based on such idea: deduct the signal that external zones reflects by the signal that reflects from the whole district of luminous point, can only extract from the signal of the super-resolution district reflection of luminous point.
Fig. 6 A illustrates data reproducing method by according to an aspect of the present invention by the super-resolution power optical beam being shone first reproducing signal that obtains in the mark in the record pattern that is recorded in shown in Fig. 2 A.Fig. 6 B illustrates data reproducing method by according to an aspect of the present invention by non-super-resolution power optical beam being shone second reproducing signal that obtains in the mark in the record pattern that is recorded in shown in Fig. 2 A.Fig. 6 C illustrates the difference signal (differential signal) between first reproducing signal and second reproducing signal.
In other words, be recorded in first reproducing signal that mark in the pattern of Fig. 2 A is reproduced as its Fig. 6 A and have the super-resolution phenomenon.Be recorded in second reproducing signal that mark in the pattern of Fig. 2 A is reproduced as its Fig. 6 B and do not have the super-resolution phenomenon.
The time delay of first reproducing signal and second reproducing signal is compensated and is carried out computing by difference signal, thereby obtains first reproducing signal shown in Fig. 6 C and the difference signal between second reproducing signal.As a result, be excluded from described difference signal from the component of signal of the external zones of light beam spot reflection, only the component of signal from the super-resolution district is retained in the difference signal, thereby has overcome the ISI problem that is caused by external zones.With reference to Fig. 6 C, have less than the 75nm mark of the size of resolution characteristic and between blank partly locate accurately to be reproduced at A, B, C, D, E and F, and regardless of mark and blank quantity, the signal level of A, B, C, D, E and F part all is uniform.In addition, though 300nm mark and blank appear at the 75nm mark and blank near the time, the signal level of the 300nm mark adjacent with the 75nm mark is also consistent with the signal level of other 300nm marks.In addition, for the 300nm mark less than whole beam spot sizes, the flat region occurs at high level and low level place, this is hinting with actual spot size and is comparing that the size of the efficient beam that is used to reproduce reduces.
Simultaneously, although describe and shown the difference signal that uses in the exemplary embodiment between first reproducing signal and second reproducing signal, can use various computings.
Fig. 7 A, Fig. 7 B and Fig. 7 C illustrate the result who is recorded in the data in the recorded at random pattern by reproducting method reproduction according to an aspect of the present invention.Fig. 7 A illustrates first reproducing signal that mark that the data reproducing method by according to an aspect of the present invention utilizes first power optical beam to reproduce recorded at random obtains, Fig. 7 B illustrates second reproducing signal that mark that the data reproducing method by according to an aspect of the present invention utilizes second power optical beam to reproduce recorded at random obtains, and Fig. 7 C illustrates the difference signal between first reproducing signal shown in Fig. 7 A and Fig. 7 B and second reproducing signal.Because Fig. 7 A and first reproducing signal of Fig. 7 B and the level of second reproducing signal are not constant,, can not correctly reproduce record mark although therefore first reproducing signal and second reproducing signal are carried out amplitude limit with predetermined level.On the other hand, the difference signal of Fig. 7 C has constant level, if therefore with predetermined level difference signal is carried out amplitude limit, then can correctly reproduce record mark.
Fig. 8 illustrates the eye pattern (eye pattern) that obtains from the difference signal shown in Fig. 7 C, and this eye pattern demonstrates the good jittering characteristic of reproducing signal.That is, data reproducing method according to an aspect of the present invention can be effectively applied to be recorded in the data in the recorded at random pattern in the super resolution information storage medium.
In data reproducing method according to an aspect of the present invention, super-resolution power optical beam and non-super-resolution power optical beam postpone illuminated with preset time, and are compensated and utilize best computing to carry out computing based on first reproducing signal of super-resolution power optical beam and based on the time delay between second reproducing signal of non-super-resolution power.By this way, can solve the ISI that the external zones in the super-resolution district from reconstruction beam point causes, thereby improve the reproducing signal characteristic in simple mode.
The schematically illustrated data reproducing equipment 900 of carrying out data reproducing method according to an aspect of the present invention of Fig. 9 A.
The diffracted element 912 of light beam that goes out from light emitted is divided into first light beam and second light beam.Can adjust the power of first light beam and the power of second light beam by the diffraction pattern that changes diffraction element 912.Diffraction element 912 can be optical grating element or hologram.
Reflected by beam splitter 914 and photoelectric detector 916, be received from first light beam of information storage medium reflection and second light beam.First light beam that receives in the photoelectric detector 916 and second light beam are converted into electric signal by recoding/reproduction signal processor 920 and are output as reproducing signal.
Recoding/reproduction signal processor 920 makes amplifier 921 amplifications carry out first beam signal of opto-electronic conversion by photoelectric detector 916, and makes compensator 922 compensation be carried out the time delay of second beam signal of opto-electronic conversion by photoelectric detector 916.The reproducing signal of the reproducing signal of first light beam and second light beam is changed by arithmetic element 923, exports by channel 1 (Ch1) as radio frequency (RF) signal then, exports by channel 2 (Ch2) as push-pull signal.
In order to reproduce the record mark that has less than the size of resolution characteristic, controller 930 control optical pickup apparatus 910 are launched super-resolution power optical beam or non-super-resolution power optical beam according to the material behavior of information storage medium 300.In addition, controller 930 utilizes RF signal and push-pull signal to carry out focus servo and circulation orbital servo.
Now, diffraction element 912 will be described in more detail.First light beam with super-resolution power must satisfy the aberration amount condition with second light beam with non-super-resolution power except satisfying power condition.In other words, the aberration amount of first and second light beams should be basic identical.When the aberration amount of first and second light beams not simultaneously, the shape that is formed on the luminous point on the information storage medium by first light beam is different from the shape that is formed on the luminous point on the information storage medium by second light beam.The different light spot form that is formed by first and second light beams makes and is difficult to (but be not impossible) to realize each side of the present invention.
In order to satisfy the power condition and the aberration amount condition of first light beam and second light beam, in an embodiment of the present invention, used the type optical grating element that glitters in the diffraction element 912.
Fig. 9 B illustrates the type optical grating element that glitters according to the embodiment of the invention.When the light beam of launching from light source 911 951 is incident on the type optical grating element 912 that glitters of Fig. 9 B, from a plurality of diffracted beams of type optical grating element 912 emission that glitter, promptly 0 order diffraction light beam 952 ,+1 order diffraction light beam 953 ,-1 order diffraction light beam 954 and ± 2 grades to ± N order diffraction light beam (not shown).Here, the infinite integer on the N representation theory.
The aberration amount of+1 order diffraction light beam 953 and-1 order diffraction light beam 954 is basic identical.General technical staff of the technical field of the invention's type optical grating element 912 of can easily realizing glittering, so that+1 order diffraction light beam 953 has high power,-1 order diffraction light beam 954 has the low relatively power of ratio+1 order diffraction light beam 953, make that perhaps+1 order diffraction light beam 953 has low-power ,-1 order diffraction light beam 954 has the high relatively power of ratio+1 order diffraction light beam 953.Simultaneously, the power of 0 order diffraction light beam 952 too a little less than, therefore can ignore.
Although the data reproducing equipment 900 shown in Fig. 9 A comprises diffraction element and generates first light beam and second light beam, but as shown in figure 10, data reproducing equipment 900 can comprise independently light source, promptly, be used to launch the super-resolution power optical beam (promptly, first light beam) first light source 941a and the secondary light source 941b that is used to launch non-super-resolution power optical beam (that is second light beam).In Figure 10, the first light source 941a and secondary light source 941b are encapsulated as an optical module.Alternatively, except forming optical module, first light source also can be provided and be disposed in different positions independently with secondary light source.When providing first light source and secondary light source independently by this way, the unnecessary diffraction element that is provided for generating first light beam and second light beam in addition.
In Figure 10, the identical functions element is represented by the label identical with label among Fig. 9, will do not provided detailed explanation.
Simultaneously, photoelectric detector 942 comprises: the first photodetector 942a is used to receive from first light source 941a emission and from first light beam of information storage medium 300 reflections; With the second photodetector 942b, be used to receive from secondary light source 941a emission and from second light beam of information storage medium 300 reflections.Utilize compensator 922 to compensate and change based on first reproducing signal of first light beam and based on the time delay between second reproducing signal of second light beam, thereby produce the RF signal that has fabulous characteristics of signals and do not have ISI by arithmetic element 923.
As mentioned above, when first light source and secondary light source were provided independently, first light source or secondary light source can preferably be used the light source that acts on data recording.In addition, first light source and secondary light source can be configured to make that optical pickup apparatus can be used to have the information storage medium of different-format compatiblely.
Up to the present the embodiments of the invention of second light beam irradiates that promptly has first light beam of super-resolution power and have non-super-resolution power to the super resolution information storage medium, have been described with two light beams.Yet, in another embodiment of the present invention, can generate a plurality of light beams by diffraction element or a plurality of light source with non-super-resolution power, and the described a plurality of light beams with non-super-resolution power shine on the super resolution information storage medium with the light beam with super-resolution power, to reproduce data from it.In other words, after the described a plurality of light beams with non-super-resolution power and light beam irradiates with super-resolution power are to super resolution information storage medium, can utilize the reproducing signal that obtains from all light beams to obtain final reproducing signal with non-super-resolution power, as shown in equation 1:
Final RF signal=RF
1-(g
1RF
2+ g
2RF
3+ ...+g
N-1RF
N) ... (1)
Wherein, RF
1The reproducing signal that expression obtains from the light beam with super-resolution power, RF
2To RF
NThe reproducing signal that expression obtains from (N-1) light beam, g
1To g
N-1It is pre-determined factor.Reproducing signal RF
2To RF
NWith RF
1Has time delay.The general technical staff of the technical field of the invention can obtain the final RF signal shown in the equation 1.
Figure 11 is the process flow diagram that the data reproducing method of being carried out by the data reproducing equipment of Fig. 9 A or Figure 10 is shown.With reference to Figure 11, at first, in operation 1100, optical pickup apparatus 910 or 940 will have first light beam irradiates of super-resolution power to information storage medium 300.
Next, in operation 1110, second light beam irradiates that optical pickup apparatus 910 or 940 postpones to have non-super-resolution power with preset time is to by in the district of the information storage medium 300 of first light beam irradiates.Irradiation with second light beam of predetermined time delay does not mean that optical pickup apparatus 910 has a mind to postpone the irradiation of second light beam, but means that time delay is at first to be passed and second light beam passes and spontaneous along same track after first light beam along track by first light beam.
In operation 1120, recoding/reproduction signal processor 920 compensation shines on the information storage medium 300 and by first reproducing signal of first light beam of its reflection and shine time delay between second reproducing signal of second light beam on the information storage medium 300, and carry out computing, as deducting second reproducing signal, to export final reproducing signal from first information reproduction.
When can realizing that super-resolution reproduces with high power, and when first reproducing signal deducts second reproducing signal, if accurately do not consider time delay between first reproducing signal and second reproducing signal, then the characteristic of the signal that obtains from described subtraction reduces.More particularly, from carrying out luminous point 1 acquisition first reproducing signal that super-resolution is reproduced, from obtaining second reproducing signal with the luminous point 2 that low-power is generally reproduced with high power.Then, carry out subtraction by giving the suitable gain of second reproducing signal by the amplifier 921 of Fig. 9 A or Figure 10.At this moment, first reproducing signal that causes by the space length between luminous point 1 and 2 of delay cell 922 control and the time delay between second reproducing signal.If the time delay out of true between first reproducing signal and second reproducing signal, then the signal that obtains from described subtraction has poor characteristic.Certainly, described time delay can obtain from the space length between luminous point 1 and 2, but at the dish reproduction period, various external disturbance may take place.For example, if the rotational speed slight modification of Spindle Motor perhaps takes place radially or tangential tilt, then the space length between the luminous point on the Shi Ji dish may change.If the change of the space length between the luminous point is not fully adjusted, then final reproducing signal has poor quality.
Figure 12 illustrates by the shake of the signal that carried out subtraction according to time delay being carried out the result's that emulation obtains curve map.In the emulation of Figure 12, the linear velocity of luminous point is 5m/s.When being dithered as 10%, the allowance of acquisition ± 0.04T (margin).Because ± the allowance of 0.04T is corresponding to ± 0.03nsec, so ± allowance time delay of 0.04T is very narrow, therefore needs the accurately unit of control lag time.
Can sharp accurately control the time delay between first reproducing signal and second reproducing signal in the following method: the first, utilize shake or bER; The second, utilize pre-pit (pre-pit) or predetermined identifying information; The 3rd, utilize swinging signal.In utilizing the method for swinging signal, can use the discrete point of swinging signal.
At first, will method that utilize shake or bER accurately to control the time delay between first reproducing signal and second reproducing signal be described.In this method, the shake or the bER of the final reproducing signal that obtains based on first reproducing signal and second reproducing signal are monitored, and the time delay between first reproducing signal and second reproducing signal is compensated so that shake that monitors or bER minimum.
Figure 14 illustrates signal processor 1420, the modification of the recoding/reproduction signal processor 920 of the data reproducing equipment 900 that this signal processor 1420 is Fig. 9 A or Figure 10, and this signal processor 1420 utilizes the shake of final reproducing signal to carry out compensation.With reference to Figure 14, detected by the first photodetector 942a from the light of first light beam of information storage medium 300 reflection, detected by the second photodetector 942b from the light of second light beam of information storage medium 300 reflections.
The light that the delay cell 1421 of signal processor 1420 receives by first photodetector 942a output, with first time delay of light delay of receiving with compensation from the luminous point 1 of the first photodetector 942a with from the time delay between the luminous point 2 of the second photodetector 942b, and the light that will postpone offers arithmetic element 1423.The light that the amplifier 1422 of signal processor 1420 receives by second photodetector 942b output amplify the light that receives, and the light that will amplify offers arithmetic element 1423.Arithmetic element 1423 deducts second reproducing signal from first reproducing signal.
As shown in Figure 13, the distance (d) between the second luminous point B2 that forms by the first luminous point B1 that will be formed by first light beam and by second light beam (v) obtains first time delay (t) divided by the linear velocity of first luminous point.Delay cell 1421 can be by postponing first reproducing signal preliminary time delay that compensates between first luminous point and second luminous point first time delay.
In the embodiment of Figure 14, delay cell 1421 utilizes jitter value to come time delay between second compensation first luminous point and second luminous point.More particularly, shake compensation unit 1424 monitoring are from the shake or the bER of the final reproducing signal of arithmetic element 1423 outputs, calculating makes the offset of shake or bER minimum, obtained for second time delay by offset being added to first time delay or deducting offset, and will offer delay cell 1,421 second time delay from first time delay.Then, delay cell 1421 postponed for second time delay with first reproducing signal, thereby accurately adjusted the time delay between first luminous point and second luminous point.
Figure 15 is that the jitter value that utilizes that illustrates according to the embodiment of the invention compensates the process flow diagram of the method for the time delay between first reproducing signal and second reproducing signal.With reference to Figure 15,, calculated for first time delay from the linear velocity of distance between the center of first and second luminous points and luminous point in operation 1500.
Next, in operation 1510, the computing that postpones the detection signal of first time delay and detection signal that carry out to postpone and luminous point 2 by the detection signal with luminous point 1 obtains reproducing signal.
In operation 1520, obtain the shake or the bER of reproducing signal, and calculating can make the shake of reproducing signal or second time delay of bER minimum.
In operation 1530, the computing that postpones the detection signal of second time delay and detection signal that carry out to postpone and luminous point 2 by the detection signal with luminous point 1 obtains reproducing signal.
Now, utilize pre-pit or predetermined identifying information to come the method for the time delay between fine compensation first reproducing signal and second reproducing signal with reference to Figure 16 and Figure 17 description.Described predetermined identifying information indication cycle property ground record is easily to distinguish the additional information of additional data and user data.
At first, with reference to Figure 16 pre-pit is described briefly.Figure 16 illustrates has the super resolution information storage medium that generates the track that pre-pit is arranged in its fate.
Optical record medium such as DVD-RAM comprises Head Section that stores header and the user data area that records user data.In DVD-RAM, each sector storage 128 byte-header information, described header is registered as pre-pit when the dish substrate is manufactured.Pick-up can be discerned sector number, sectors type, land track/groove track etc. from the header being recorded in the Head Section of being made of pre-pit.In addition, pick-up can utilize header to carry out servocontrol.In other words, the Head Section that is formed with uneven pre-pit is set in the fate of each sector.Be included in pick-up in the recording/reproducing apparatus and can utilize the information that is recorded in the Head Section desired locations on the accesses disk easily.
With reference to Figure 16, be formed on the super resolution information storage medium that an aspect of of the present present invention is applied to corresponding land track of the user data area of user data and groove track.Wherein the header Head Section 1600 that is registered as pre-pit also is formed on this super resolution information storage medium.
As mentioned above, in order to store header, the Head Section that forms by pre-pit can be formed in addition the fate of super resolution information storage medium on, as shown in figure 16.
Figure 17 illustrates the process flow diagram that utilizes pre-pit and identifying information to compensate the method for the time delay between first reproducing signal and second reproducing signal according to another embodiment of the present invention.
At first, in operation 1700, calculated for first time delay from the linear velocity of distance between the center of first and second luminous points and luminous point.
Next, in operation 1710, the computing that postpones the detection signal of first time delay and detection signal that carry out to postpone and luminous point 2 by the detection signal with luminous point 1 obtains reproducing signal.
Then, operating 1720, the difference of the time that time that utilization use first light beam reproduction pre-pit or identifying information are required and use second light beam reproduction pre-pit or identifying information are required compensates the time delay between first light beam and second light beam.
Afterwards, in operation 1730, by the detection signal of luminous point 1 being postponed with the corresponding time of time delay that has compensated and carrying out the detection signal that postpones and the computing of the detection signal of luminous point 2 obtains reproducing signal.
Although the super resolution information storage medium that reproducting method was applied to according to an aspect of the present invention is described to have the sandwich construction that is formed on suprabasil 5 or 7 layers, and the super-resolution layer is made by certain material, but described embodiment all should be considered to exemplary in all respects.Say that more rightly each side of the present invention can be applicable to stand various types of information storage mediums of super-resolution phenomenon.
Although shown particularly with reference to exemplary embodiment of the present invention and described the present invention, but it should be understood by one skilled in the art that, under the situation that does not break away from the scope and spirit of the present invention that are defined by the claims, can carry out the change on various forms and the details.
Utilizability on the industry
The present invention can be applicable to the method and apparatus of the data of reproducing on super resolution information storage medium And this super resolution information storage medium.
Claims (22)
1, a kind of method that is recorded in the data in the super resolution information storage medium less than the mark of the size of the resolution characteristic of incident beam to have of reproducing, this method comprises:
To have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium;
Detection is based on first reproducing signal of first light beam with based on second reproducing signal of second light beam;
Compensate the time delay between first reproducing signal and second reproducing signal;
Calculate the difference signal between first reproducing signal and second reproducing signal,
Wherein, the step of shining first and second light beams comprises: utilize diffraction element will be divided into first light beam and second light beam from the light beam that single source is launched,
Wherein, the step of dividing the light beam launch from single source, in a plurality of diffracted beams that generate by diffraction element-k order diffraction light beam is as first light beam, and+k order diffraction light beam is as second light beam,
Wherein, described k represents infinite integer, and described diffraction element is the type optical grating element that glitters.
2, data reproducing method as claimed in claim 1 wherein, is got rid of from the component of signal of the external zones reflection of first light beam and second light beam from described difference signal.
3, data reproducing method as claimed in claim 1, wherein, only the Signal Separation from the super-resolution district is retained in the described difference signal.
4, data reproducing method as claimed in claim 1, wherein, the aberration amount of first light beam and second light beam is basic identical.
5, data reproducing method as claimed in claim 1, wherein, first light beam and second light beam shine on the same track with time delay.
6, a kind of method that is recorded in the data in the super resolution information storage medium less than the mark of the size of the resolution characteristic of incident beam to have of reproducing, this method comprises:
To have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium;
Detection is based on first reproducing signal of first light beam with based on second reproducing signal of second light beam;
Compensate the time delay between first reproducing signal and second reproducing signal;
Calculate the difference signal between first reproducing signal and second reproducing signal,
Wherein, the step of shining first and second light beams comprises: utilize diffraction element will be divided into first light beam and second light beam from the light beam that single source is launched,
Wherein, the step of dividing the light beam launch from single source, in a plurality of diffracted beams that generate by diffraction element+k order diffraction light beam is as first light beam, and-k order diffraction light beam is as second light beam,
Wherein, described k represents infinite integer, and described diffraction element is the type optical grating element that glitters.
7, data reproducing method as claimed in claim 6 wherein, is got rid of from the component of signal of the external zones reflection of first light beam and second light beam from described difference signal.
8, data reproducing method as claimed in claim 6, wherein, only the Signal Separation from the super-resolution district is retained in the described difference signal.
9, data reproducing method as claimed in claim 6, wherein, the aberration amount of first light beam and second light beam is basic identical.
10, data reproducing method as claimed in claim 6, wherein, first light beam and second light beam shine on the same track with time delay.
11, a kind of method that is recorded in the data in the super resolution information storage medium less than the mark of the size of the resolution characteristic of incident beam to have of reproducing, this method comprises:
First light beam irradiates that will have super-resolution power is in information storage medium;
A plurality of second light beam irradiates that will have non-super-resolution power are to by on the information storage medium of first light beam irradiates;
Compensation is from first reproducing signal of first light beam with from the time delay between second reproducing signal of described a plurality of second light beams;
First reproducing signal and second reproducing signal are carried out difference operation to detect final reproducing signal, wherein, utilize diffraction element will be divided into described first light beam and described a plurality of second light beam from the light beam that single source is launched, in a plurality of diffracted beams that generate by diffraction element+one of k order diffraction light beam is as first light beam, a plurality of light beams in the-k order diffraction light beam are as described a plurality of second light beams
Wherein, described k represents infinite integer, and described diffraction element is the type optical grating element that glitters.
12, data reproducing method as claimed in claim 11, wherein, in the step of compensating time delay, compensating time delay is so that the shake or the bit error rate minimum of final reproducing signal.
13, data reproducing method as claimed in claim 11, wherein, in the step of compensating time delay, utilize to use first light beam to reproduce the required time of the pre-pit of making user data of no use or identifying information and come compensating time delay with the difference of using second light beam to reproduce the required time of described pre-pit or identifying information.
14, data reproducing method as claimed in claim 11 wherein, in the step of compensating time delay, utilizes swinging signal to come compensating time delay.
15, a kind of equipment that is recorded in the data in the super resolution information storage medium less than the mark of the size of the resolution characteristic of incident beam to have that reproduces, described equipment comprises:
Optical pickup apparatus will have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium;
Signal processor detects based on first reproducing signal of first light beam with based on second reproducing signal of second light beam, compensates the time delay between first reproducing signal and second reproducing signal, and first reproducing signal and second reproducing signal are carried out difference operation;
Controller utilizes from the signal of signal processor reception and controls optical pickup apparatus,
Wherein, described optical pickup apparatus comprises: light source; And diffraction element, will be divided into first light beam and second light beam from the light beam that described light emitted goes out,
Wherein, first light beam corresponding in a plurality of diffracted beams that generate by diffraction element+k order diffraction light beam, second light beam is corresponding to-k order diffraction light beam,
Wherein, described k represents infinite integer, and described diffraction element is the type optical grating element that glitters.
16, data reproducing equipment as claimed in claim 15, wherein, first light beam and second light beam shine on the same track with time delay.
17, a kind of equipment that is recorded in the data in the super resolution information storage medium less than the mark of the size of the resolution characteristic of incident beam to have that reproduces, described equipment comprises:
Optical pickup apparatus will have first light beam of the resolution power that causes the super-resolution phenomenon and have second light beam irradiates of the resolution power that does not cause the super-resolution phenomenon to information storage medium;
Signal processor detects based on first reproducing signal of first light beam with based on second reproducing signal of second light beam, compensates the time delay between first reproducing signal and second reproducing signal, and first reproducing signal and second reproducing signal are carried out difference operation;
Controller utilizes from the signal of signal processor reception and controls optical pickup apparatus,
Wherein, described optical pickup apparatus comprises: light source; And diffraction element, will be divided into first light beam and second light beam from the light beam that described light emitted goes out,
Wherein, first light beam corresponding in a plurality of diffracted beams that generate by diffraction element-k order diffraction light beam, second light beam is corresponding to+k order diffraction light beam,
Wherein, described k represents infinite integer, and described diffraction element is the type optical grating element that glitters.
18, data reproducing equipment as claimed in claim 17, wherein, first light beam and second light beam shine on the same track with time delay.
19, a kind of equipment that is recorded in the data in the super resolution information storage medium less than the mark of the size of the resolution characteristic of incident beam to have that reproduces, this equipment comprises:
Optical pickup apparatus, first light beam irradiates that will have super-resolution power are in information storage medium, and a plurality of second light beam irradiates that will have non-super-resolution power are to by on the information storage medium of first light beam irradiates;
Signal processor, compensation is carried out difference operation to detect final reproducing signal from first reproducing signal of first light beam with from the time delay between second reproducing signal of described a plurality of second light beams with to first reproducing signal and second reproducing signal;
Controller utilizes from the signal of signal processor reception and controls optical pickup apparatus,
Wherein, described optical pickup apparatus comprises: light source; Diffraction element will be divided into first light beam and described a plurality of second light beam from the light beam that described light emitted goes out,
Wherein, in a plurality of diffracted beams that generate by diffraction element-one of k order diffraction light beam is as first light beam, and a plurality of light beams the in+k order diffraction light beam are as described a plurality of second light beams,
Wherein, described k represents infinite integer, and described diffraction element is the type optical grating element that glitters.
20, data reproducing equipment as claimed in claim 19, wherein, described signal processor compensates described time delay so that the shake or the bit error rate minimum of final reproducing signal.
21, data reproducing equipment as claimed in claim 19, wherein, described signal processor utilization is used first light beam to reproduce the required time of the pre-pit of making user data of no use or identifying information to come compensating time delay with the difference of using second light beam to reproduce the required time of described pre-pit or identifying information.
22, data reproducing equipment as claimed in claim 19, wherein, described signal processor utilizes swinging signal to come compensating time delay.
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| KR1020040050787 | 2004-06-30 | ||
| KR20040050787 | 2004-06-30 | ||
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| CN100547660C true CN100547660C (en) | 2009-10-07 |
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| KR (2) | KR101044942B1 (en) |
| CN (1) | CN100547660C (en) |
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| GB0607088D0 (en) * | 2006-04-07 | 2006-05-17 | Glaxosmithkline Biolog Sa | Vaccine |
| EP2136364A1 (en) * | 2008-06-16 | 2009-12-23 | Deutsche Thomson OHG | High data capacity storage medium with protection code, method for obtaining the protection code and respective data reading apparatus |
| JP5230524B2 (en) * | 2009-05-25 | 2013-07-10 | 三菱電機株式会社 | Optical head device and optical disk device |
| CN107478615B (en) * | 2017-07-11 | 2020-08-04 | 中国科学院上海光学精密机械研究所 | Super-resolution non-fluorescence imaging method based on material thermal-induced transmittance change |
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| JPH087283A (en) * | 1994-06-23 | 1996-01-12 | Hitachi Ltd | Device and method for reproducing optical information |
| JPH09120564A (en) * | 1995-10-23 | 1997-05-06 | Hitachi Ltd | Optical disk device |
| JP2000017306A (en) | 1998-07-02 | 2000-01-18 | Shimazu Mekutemu Kk | Degreasing sintering furnace |
| JP2000173061A (en) | 1998-09-28 | 2000-06-23 | Matsushita Electric Ind Co Ltd | Optical disk signal-reproducing device |
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2005
- 2005-03-02 KR KR1020050017249A patent/KR101044942B1/en not_active IP Right Cessation
- 2005-03-03 KR KR1020050017576A patent/KR101108680B1/en not_active IP Right Cessation
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