WO2000038183A3 - Optical scanning head for data storage disks - Google Patents

Optical scanning head for data storage disks Download PDF

Info

Publication number
WO2000038183A3
WO2000038183A3 PCT/DE1999/004117 DE9904117W WO0038183A3 WO 2000038183 A3 WO2000038183 A3 WO 2000038183A3 DE 9904117 W DE9904117 W DE 9904117W WO 0038183 A3 WO0038183 A3 WO 0038183A3
Authority
WO
WIPO (PCT)
Prior art keywords
optical scanning
scanning head
storage capacity
data storage
dvd
Prior art date
Application number
PCT/DE1999/004117
Other languages
German (de)
French (fr)
Other versions
WO2000038183A2 (en
Inventor
Edgar Pawlowski
Original Assignee
Hertz Inst Heinrich
Edgar Pawlowski
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hertz Inst Heinrich, Edgar Pawlowski filed Critical Hertz Inst Heinrich
Publication of WO2000038183A2 publication Critical patent/WO2000038183A2/en
Publication of WO2000038183A3 publication Critical patent/WO2000038183A3/en

Links

Classifications

    • 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
    • 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
    • G11B7/1359—Single prisms
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • 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
    • G11B7/1372—Lenses
    • 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
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • 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

Abstract

The storage capacity of a DVD is already higher than that of a conventional CD by a factor of 20. The invention provides three alternatives for further increasing storage capacity and increasing the reading out speed. All of the inventive solutions are based on the main idea of developing the known optical scanning head into a 'multi-spot DVD pick-up' with which it is possible to produce a number of focusing points exceeding the minimum number, for synchronously scanning a large number of tracks and layers. To this end, the optical scanning head (1) may have a multiplex objective (7) with a superimposed grating structure (8) made up of a number of individual grating structures (J1, J2, J3,...Ji). The optical scanning head may also have additional beam splitters in front of or behind the collimator or a number of simultaneously operated laser diodes of adjacent wavelengths. Combinations are also possible. With the inventive scanning heads, DVDs can be used wherever large quantities of data have to be scanned quickly.
PCT/DE1999/004117 1998-12-22 1999-12-20 Optical scanning head for data storage disks WO2000038183A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998160563 DE19860563C2 (en) 1998-12-22 1998-12-22 Optical scanning head for data storage disks
DE19860563.3 1998-12-22

Publications (2)

Publication Number Publication Date
WO2000038183A2 WO2000038183A2 (en) 2000-06-29
WO2000038183A3 true WO2000038183A3 (en) 2000-11-09

Family

ID=7893015

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/004117 WO2000038183A2 (en) 1998-12-22 1999-12-20 Optical scanning head for data storage disks

Country Status (2)

Country Link
DE (1) DE19860563C2 (en)
WO (1) WO2000038183A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125870B4 (en) * 2001-05-26 2006-09-14 Lutz Dr. Kipp Optical element for imaging objects and / or for focusing electromagnetic radiation or rays of elementary particles and its use
DE10344504A1 (en) 2003-09-24 2005-05-25 Deutsche Thomson-Brandt Gmbh Scanning device for a device for reading or writing optical record carriers
US20100103798A1 (en) * 2006-11-10 2010-04-29 Gore Makarand P Optical data recording and imaging on media using apochromatic lenses and a light separating means
WO2010060460A1 (en) * 2008-11-25 2010-06-03 Institut De Ciències Fotòniques, Fundació Privada Device for multispectral and spatial shaping

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455061A (en) * 1980-07-31 1984-06-19 The Regents Of The University Of Minnesota Multi-faceted holographic optical element and methods of making and using same
US5481407A (en) * 1993-09-14 1996-01-02 Litel Instruments Apparatus and process for using Fresnel zone plate array for processing materials
US5502707A (en) * 1992-02-21 1996-03-26 Matsushita Electric Industrial Co., Ltd. Diffraction grating and optical pickup apparatus with diffracting grating
US5526336A (en) * 1995-01-24 1996-06-11 Samsung Electronics Co., Ltd. Optical pickup for optical disk having multiple recording layers
US5548418A (en) * 1994-01-14 1996-08-20 Dcs Corporation Holographic structured light generator
US5629917A (en) * 1994-12-05 1997-05-13 Kamatani; Yasuo Integrated optical pick-up emits light beams of selective wavelengths to an optical disk with multiple data layers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5838496A (en) * 1995-08-28 1998-11-17 Asahi Kogaku Kogyo Kabushiki Kaisha Diffractive multi-focal objective lens
DE19636595C2 (en) * 1996-09-10 1999-10-07 Fraunhofer Ges Forschung Method and device for reading optical storage media

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455061A (en) * 1980-07-31 1984-06-19 The Regents Of The University Of Minnesota Multi-faceted holographic optical element and methods of making and using same
US5502707A (en) * 1992-02-21 1996-03-26 Matsushita Electric Industrial Co., Ltd. Diffraction grating and optical pickup apparatus with diffracting grating
US5481407A (en) * 1993-09-14 1996-01-02 Litel Instruments Apparatus and process for using Fresnel zone plate array for processing materials
US5548418A (en) * 1994-01-14 1996-08-20 Dcs Corporation Holographic structured light generator
US5629917A (en) * 1994-12-05 1997-05-13 Kamatani; Yasuo Integrated optical pick-up emits light beams of selective wavelengths to an optical disk with multiple data layers
US5526336A (en) * 1995-01-24 1996-06-11 Samsung Electronics Co., Ltd. Optical pickup for optical disk having multiple recording layers

Also Published As

Publication number Publication date
DE19860563C2 (en) 2001-09-06
DE19860563A1 (en) 2000-06-29
WO2000038183A2 (en) 2000-06-29

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