CN104967775A - Zoom lens imaging apparatus and method - Google Patents
Zoom lens imaging apparatus and method Download PDFInfo
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- CN104967775A CN104967775A CN201510308643.7A CN201510308643A CN104967775A CN 104967775 A CN104967775 A CN 104967775A CN 201510308643 A CN201510308643 A CN 201510308643A CN 104967775 A CN104967775 A CN 104967775A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
Abstract
The invention relates to a zoom lens imaging apparatus and method. The apparatus includes at least two zoom imaging units, a channel selector connected with the zoom imaging units; and a control unit connected with the zoom imaging units and the channel selector. Focal lengths of the zoom imaging units increase progressively in sequence, and the focal lengths of two adjacent zoom imaging units partially overlap. The channel selector is used for selecting and taking signals outputted by at least one zoom imaging units as the output. The control unit is used for controlling the focal length between the zoom imaging unit imaging at the moment and the zoom imaging unit imaging at the next moment to sequentially overlap with focal lengths between each two zoom imaging units within the former focal length, and also for controlling the channel selector to switch from taking the zoom imaging unit imaging at the moment as a signal input end sequentially to taking the zoom imaging unit imaging at the next moment as the signal input end. The zoom lens imaging apparatus and method can be used for reducing the attenuation effects of a zoom lens with a wide-range focal length on the environmental illumination.
Description
Technical field
The present invention relates to video imaging apparatus, more particularly, relate to a kind of device and method of zoom lens imaging.
Background technology
The data analysis display of public safety department, criminal offence usually occurs in the region that illumination is low, illumination condition is poor.From crime time, night, crime was more than daytime, accounted for 79.1%.Therefore, after video image imaging device (hereinafter referred to as video camera) enters security monitoring field, the minimal illumination condition (hereinafter referred to as low-light (level) performance) that video camera can meet basic imaging indicators just becomes the target that user seek assiduously.Meanwhile, in order to improve the service efficiency of video camera, the maximum magnitude (hereinafter referred to as coverage) from the near to the remote that video camera can be seen also becomes the focus that user pays close attention to.
The coverage of video camera is relevant with lens focus, when lens focus (usually says camera lens little f number) by short elongated time (such as, changing to 80mm from 4mm), the scope that video camera can be seen is become far by near, and coverage is increasing.Video camera possesses larger coverage by configuration continuous magnification lens usually.
The coke ratio of the low-light (level) performance of video camera and camera lens (focal length clear aperature ratio, the large F number of camera lens usually said) relevant with the performance of imageing sensor.For the imageing sensor of particular characteristic, when camera lens coke ratio (such as, changes to F1.0 from F5.0) from large to small, clear aperature is changed from small to big, and the low-light (level) performance of video camera is just become better and better.
In addition, the image processor of video camera indispensability, also can improve the low-light (level) performance of video camera to a certain extent.
The video camera with continuous magnification lens all includes a continuous magnification lens, an imageing sensor and an image-signal processor.
Along with the continuous progress of semiconductor technology, the performance of imageing sensor constantly promotes, when can accomplish at present use the camera lens of F1.4 and coordinate image processor, can under the low-light (level) environment of 0.08lux blur-free imaging (by ambient light illumination grade scale, 0.01lux is moon lighting level).
But be subject to the restriction of lens design thought and technology condition, the video camera with continuous magnification lens can not present the existing performance of imageing sensor completely.
Current, the design philosophy of video image imaging device provides with a continuous magnification lens the whole focal range needing to use, and such as, uses the continuous magnification lens that a focal range is 4mm ~ 132mm.In this case, the long-focus of camera lens and the ratio of short focus are 132mm/4mm=33, with existing technology condition, cannot focal length and short Jiao Chu ensure simultaneously camera lens have same little coke ratio (as, F1.0), can only accomplish that in the change procedure of lens focus from 4mm to 132mm, coke ratio changes to F5.0 from F1.6.
Now, case of external ambient light illumination is 100%, then camera lens is 1/ (1.6*1.6)=39% at the light-inletting quantity of short Jiao4mmChu, is 1/ (3.6*3.6)=4% at focal length 132mm place light-inletting quantity.This means in order to allow can the transducer of imaging under 0.08lux ambient light illumination in the imaging of focal length place, ambient light illumination can not lower than 0.08Lux/4%=2lux.In other words, when ambient light illumination 0.08lux, lens focus are positioned at 132mm, the illumination being delivered to imageing sensor only has 0.08*4%=0.0032Lux, far below the minimum imaging illumination requirement of imageing sensor, causes what image all can not see.
Calculate as can be seen from above-mentioned citing, the attenuation of large coke ratio to ambient lighting at long-focus place is quite significant, and it plays with significantly affecting the existing performance of transducer.This directly causes low in illumination, that illumination condition is poor region, and video camera possibly cannot see any image, loses the meaning of video frequency graphic monitoring.
In order to reduce this attenuation, the compensating mode usually taked has following several:
1. carry out light filling with visible or infrared light, improve ambient light illumination; This method exposes position and direction of observation, the scope of video camera, and the disguise of video camera is no longer existed.The security monitoring of sensitizing range is made to lose original effect.
2. adopt subversive sensor technology, such as, EMCCD, hundreds and thousands of times of ground improve the sensitivity of transducer, make the attenuation of camera lens to ambient light illumination negligible.But this mode makes the increase of video camera cost thousands of times, camera lens and video camera cost sum under existing technology condition.Cannot use by spread;
3. pair existing transducer continues to improve, and suitably improves the sensitivity of transducer; This improved speed is slow, the lifting usually through just there being two, three times for many years.
Above-mentioned various compensating modes, though respectively have length, not from solving continuous magnification lens to the attenuation problem of ambient light illumination at all, the existing performance of imageing sensor is not still embodied at camera lens focal length place completely.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of device and method of zoom lens imaging, reduces the attenuation of zoom lens to ambient light illumination under making the zoom lens of the burnt section on a large scale.
The technical solution adopted for the present invention to solve the technical problems is: the device constructing a kind of zoom lens imaging, comprises,
At least two varifocal imaging unit, described in each, the burnt section of varifocal imaging unit increases progressively successively, and the burnt section of adjacent two described varifocal imaging unit partially overlaps;
The channel to channel adapter be connected with described at least two varifocal imaging unit, exports as it for selecting the signal that described at least one, varifocal imaging unit inputs;
The control unit communicated to connect with described varifocal imaging unit and described channel to channel adapter respectively;
Described control unit overlaps successively for the varifocal imaging unit of varifocal imaging unit with subsequent time imaging that controls current imaging and the varifocal imaging unit focal length between any two between the varifocal imaging unit and the burnt section of the varifocal imaging unit of described subsequent time imaging of described current imaging, also controls described channel to channel adapter and switches to the varifocal imaging unit of described subsequent time imaging successively as signal input part by the varifocal imaging unit of described current imaging as signal input part.
Preferably, described varifocal imaging unit comprises zoom lens and imageing sensor,
Described zoom lens, for obtaining the optical imagery of video/image, wherein, the burnt section of the described zoom lens that varifocal imaging unit described in each is corresponding increases progressively successively, and the burnt section of adjacent two described zoom lens partially overlaps;
Described imageing sensor, is connected with described zoom lens, for receiving the optical imagery of the video/image of described zoom lens and being converted to initial video/electric image signal output.
Preferably, the device of described zoom lens imaging also comprises image processor,
Described image processor, is connected with described imageing sensor and described channel to channel adapter, for receive described imageing sensor export described initial video/electric image signal and be converted into the video/image standard meeting setting video signal export;
Or described image processor, is connected with described channel to channel adapter, for described initial video/electric image signal of receiving from described channel to channel adapter and the video signal being converted into the video/image standard meeting setting export.
Preferably, the focal length of described zoom lens and the ratio range of short Jiao are 1-5.
Preferably, described control unit comprises varifocal imaging control unit and channel to channel adapter control unit,
Described varifocal imaging control unit, be connected with described varifocal imaging unit and described channel to channel adapter control unit, for the varifocal imaging unit of the varifocal imaging unit and described subsequent time imaging that control described current imaging, and the varifocal imaging unit focal length between any two between the varifocal imaging unit and the burnt section of the varifocal imaging unit of described subsequent time imaging of described current imaging overlaps successively, also export selection and control signal to described channel to channel adapter control unit, using control described channel to channel adapter control unit select by described current imaging varifocal imaging unit as signal input part switch to successively the varifocal imaging unit of described subsequent time imaging as signal input part,
Described channel to channel adapter control unit, be connected with described varifocal imaging control unit and described channel to channel adapter, for receiving the selection control signal from described varifocal imaging control unit, using control described channel to channel adapter select by described current imaging varifocal imaging unit as signal input part switch to successively the varifocal imaging unit of described subsequent time imaging as signal input part.
Preferably, the coke ratio of described zoom lens is less than or equal to F2.8.
Preferably, the coke ratio of described zoom lens different in the device of described zoom lens imaging is identical or not identical.
The present invention also provides a kind of formation method of zoom lens, comprises the steps:
A. judge that channel to channel adapter is selected whether to overlap with the burnt section of the varifocal imaging unit of subsequent time imaging as the current varifocal imaging unit that signal input part is corresponding, if not, then perform step B, if so, then perform step C;
B. the burnt section of the varifocal imaging unit of adjustment and current imaging has and to overlap and burnt section is positioned at the focal length of the intermediate zoom image-generating unit between the varifocal imaging unit of described current imaging and the varifocal imaging unit of described subsequent time imaging, and the focal length of the varifocal imaging unit of described current imaging, described intermediate zoom image-generating unit is overlapped with the focal length of the varifocal imaging unit of described current time imaging, control described channel to channel adapter selects described intermediate zoom image-generating unit as signal input part simultaneously, gets back to steps A;
C. the focal length adjusting the varifocal imaging unit of described current imaging overlaps with the focal length of the varifocal imaging unit of described subsequent time imaging, control unit control channel selector select the varifocal imaging unit of described subsequent time imaging as signal input part.
Preferably, the formation method of described zoom lens also comprises the steps:
The optical imagery of video/image is obtained by zoom lens;
Described imageing sensor obtains the optical imagery of described video/image, is converted to initial video/electric image signal, and exports image processor to;
Described image processor obtains described initial video/electric image signal and is converted into the video signal output of the video/image standard meeting setting.
Preferably, the focal length of described zoom lens and the ratio range of short Jiao are 1-5.
Implement the device and method of zoom lens imaging of the present invention, there is following beneficial effect: use at least plural varifocal imaging unit to carry out capture video or image, the burnt section of varifocal imaging unit increases progressively successively, and the burnt section of adjacent two varifocal imaging unit partially overlaps, thus ensure that the burnt segment limit of the device entirety of zoom lens imaging is enough large, and the long-focus of each varifocal imaging unit and the ratio of short focus less, each varifocal imaging unit can be made under prior art conditions to have little coke ratio, and then reduce the decay of ambient lighting.Control unit controls the varifocal imaging unit of current imaging and the varifocal imaging unit of subsequent time imaging, and the varifocal imaging unit focal length between any two between the varifocal imaging unit of current imaging and the burnt section of the varifocal imaging unit of subsequent time imaging overlaps successively, also control channel selector switches to the varifocal imaging unit of subsequent time imaging as signal input part by the varifocal imaging unit of current imaging successively as signal input part, thus channel to channel adapter can be switched between different varifocal imaging unit, varifocal imaging unit corresponding to required focal length is selected to carry out capture video or image output according to actual needs, thus make the burnt segment limit increasing varifocal imaging unit under the attenuation not increasing zoom lens, the attenuation of zoom lens to ambient light illumination is reduced under that is to say the varifocal imaging unit of the burnt section on a large scale.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of device first embodiment of zoom lens imaging of the present invention;
Fig. 2 is the structural representation of device second embodiment of zoom lens imaging of the present invention.
Embodiment
The device of zoom lens imaging of the present invention comprises at least two varifocal imaging unit, channel to channel adapter, control units.
The burnt section of each varifocal imaging unit increases progressively successively, and the burnt section of adjacent two varifocal imaging unit partially overlaps.
Channel to channel adapter is connected with at least two varifocal imaging unit, exports as it for the signal selecting at least one varifocal imaging unit to input.
Control unit communicates to connect with varifocal imaging unit and channel to channel adapter respectively.Control unit overlaps successively for the varifocal imaging unit of varifocal imaging unit with subsequent time imaging that controls current imaging and the varifocal imaging unit focal length between any two between the varifocal imaging unit of current imaging and the burnt section of the varifocal imaging unit of subsequent time imaging, and also control channel selector switches to the varifocal imaging unit of subsequent time imaging as signal input part by the varifocal imaging unit of current imaging successively as signal input part.
Varifocal imaging unit comprises zoom lens and imageing sensor.Zoom lens is for obtaining the optical imagery of video/image, and wherein, the burnt section of the zoom lens that each varifocal imaging unit is corresponding increases progressively successively, and the burnt section of adjacent two zoom lens partially overlaps.Imageing sensor is connected with zoom lens, for receiving the optical imagery of the video/image of zoom lens and being converted to initial video/electric image signal output.Wherein, the focal length of zoom lens and the ratio range of short Jiao are 1-5; The coke ratio of zoom lens is less than or equal to F2.8.The coke ratio of zoom lens different in the device of zoom lens imaging is identical or not identical.
The device of zoom lens imaging also comprises image processor.Image processor is connected with imageing sensor and channel to channel adapter, for receive imageing sensor export initial video/electric image signal and be converted into the video image standard meeting setting video signal export.Or image processor is connected with channel to channel adapter, for initial video/electric image signal of receiving from channel to channel adapter and the video signal being converted into the video image standard meeting setting export.
Control unit comprises varifocal imaging control unit and channel to channel adapter control unit.Varifocal imaging control unit is connected with varifocal imaging unit and channel to channel adapter control unit, for the varifocal imaging unit of the varifocal imaging unit and subsequent time imaging that control current imaging, and the varifocal imaging unit focal length between any two between the varifocal imaging unit of current imaging and the burnt section of the varifocal imaging unit of subsequent time imaging overlaps successively, also export selection and control signal to channel to channel adapter control unit, using control channel selector control unit select by current imaging varifocal imaging unit as signal input part switch to successively the varifocal imaging unit of subsequent time imaging as signal input part.
Channel to channel adapter control unit is connected with varifocal imaging control unit and channel to channel adapter, for receiving the selection control signal from varifocal imaging control unit, using control channel selector select by current imaging varifocal imaging unit as signal input part switch to successively the varifocal imaging unit of subsequent time imaging as signal input part.
In the first embodiment of the device of zoom lens imaging of the present invention, the device of zoom lens imaging comprises at least two varifocal imaging unit, varifocal imaging unit is 3 in the present embodiment, such as the first varifocal imaging unit 11, second varifocal imaging unit 12 and the 3rd varifocal imaging unit 13, the device of zoom lens imaging also comprises channel to channel adapter 2 and control unit 3.
First, second, and third varifocal imaging unit 11,12, the burnt section of 13 increases progressively successively, and the burnt section of the first adjacent varifocal imaging unit 11 and the second varifocal imaging unit 12 partially overlaps, and the second varifocal imaging unit 12 and the burnt section of the 3rd varifocal imaging unit 13 partially overlap.First, second, and third varifocal imaging unit 11,12,13 respectively correspondence comprises first, second, third zoom lens 111,121,131, first, second, third imageing sensor 112,122,132, with first, second, third image processor 113,123,133.First zoom lens 111, first imageing sensor 112 is connected successively with the first image processor 113, second zoom lens 121, second imageing sensor 122 is connected successively with the second image processor 123, and the 3rd zoom lens 131, the 3rd imageing sensor 132 are connected successively with the 3rd image processor 133.
First, second, and third zoom lens 111,121,131 for obtaining the optical imagery of video/image, wherein, and first, second, and third zoom lens 111,121, the burnt section of 131 increases progressively successively, and first, second zoom lens 111, the burnt section between 121 partially overlaps, and second, third zoom lens 121, the burnt section between 131 partially overlaps.The focal length of first, second, and third zoom lens 111,121,131 and the ratio range of short Jiao are 1-5, and coke ratio is less than or equal to F2.8, and first, second, and third zoom lens 111,121, the coke ratio of 131 is identical or not identical.
The burnt section of the first zoom lens 111 is 4-15mm, and the burnt section of the second zoom lens 121 is 14mm-48mm, and the burnt section of the 3rd zoom lens 131 is 44mm-132mm.Here, the burnt section of zoom lens increases progressively the short focus that refers to burnt section and the equal correspondence of long-focus increases progressively.
First, second, third imageing sensor 112,122,132 and first, second, third corresponding zoom lens 111,121,131 connect, for obtaining first, second, third corresponding zoom lens 111, the optical imagery of 121,131 is also converted to initial video/electric image signal and exports.
First, second, third image processor 113,123,133, for receiving corresponding first, second, third imageing sensor 112,122,132 export initial video/electric image signal and be converted into the video/image standard meeting setting video signal export.
Channel to channel adapter 2 and first, second, and third varifocal imaging unit 11,12, first, second, third image processor 113 corresponding in 13,123,133 connect, for selecting first, second, third image processor 113,123, the signal that in 133, at least one inputs exports as it, and according to actual needs, channel to channel adapter 2 can select first, second, and third varifocal imaging unit 11 simultaneously, 12, first, second, third image processor 113,123 corresponding in 13, multiple the inputted signal in 133 exports as it.
Control unit 3 communicates to connect with first, second, and third varifocal imaging unit 11,12,13 and channel to channel adapter 2 respectively.Control unit 3 overlaps successively for the varifocal imaging unit of varifocal imaging unit with subsequent time imaging that controls current imaging and the varifocal imaging unit focal length between any two between the varifocal imaging unit of current imaging and the burnt section of the varifocal imaging unit of subsequent time imaging, and also control channel selector switches to the varifocal imaging unit of subsequent time imaging as signal input part by the varifocal imaging unit of current imaging successively as signal input part.
Control unit 3 comprises varifocal imaging control unit 31 and channel to channel adapter control unit 32.
Varifocal imaging control unit 31 and first, second and the 3rd varifocal imaging unit 11, 12, connect in 13, and be connected with channel to channel adapter control unit 32, for the varifocal imaging unit of the varifocal imaging unit and subsequent time imaging that control current imaging, and the varifocal imaging unit focal length between any two between the varifocal imaging unit of current imaging and the burnt section of the varifocal imaging unit of subsequent time imaging overlaps successively, also export selection and control signal to channel to channel adapter control unit 32, using control channel selector 2 select by the varifocal imaging unit of current imaging as signal input part switch to successively the varifocal imaging unit of subsequent time imaging as signal input part.
Channel to channel adapter control unit 32 is connected with varifocal imaging control unit 31 and channel to channel adapter 2, for receiving the selection control signal from varifocal imaging control unit 31, using control channel selector 2 select by the varifocal imaging unit of current imaging as signal input part switch to successively the varifocal imaging unit of subsequent time imaging as signal input part.
The workflow of the device of zoom lens imaging is as follows:
The device of current time zoom lens imaging needs at the position of 4mm focal length capture video/image, then varifocal imaging control unit 31 controls the first zoom lens 111 and carries out video/image optical imagery, first imageing sensor 112 obtain this optical imagery and be converted to initial video/electric image signal export to the first image processor 113, first image processor 113 receive this initial video/electric image signal and be converted into the video/image standard meeting setting video signal export.The first image processor 113 in first varifocal imaging unit 11 as signal input part, is received the video signal of the first image processor 113 output and exports by channel to channel adapter control unit 32 control channel selector 2.
If need at the position of 30mm focal length capture video/image at the device of subsequent time zoom lens imaging, then varifocal imaging control unit 31 controls the first zoom lens 111 to corresponding long-focus 15mm place zoom, control the second zoom lens 121 to short focus 14mm place zoom simultaneously, when the focal length of the first zoom lens 111 and the second zoom lens 121 overlaps, channel to channel adapter control unit 32 control channel selector 2 selects the second image processor 123 as signal input part, control the second zoom lens 112 simultaneously and video/image optical imagery is carried out in Focussing to the position of 30mm, second imageing sensor 122 obtains optical imagery and is converted to initial video/electric image signal and exports the second image processor 123 to, second image processor 123 will receive this initial video/electric image signal and be converted into the video signal output of the video image standard meeting setting, the video signal that channel to channel adapter 2 selects reception second image processor 123 to export.
If need at the position of 130mm focal length capture video/image at the device of subsequent time zoom lens imaging, then select the second image processor 123 after signal input part channel to channel adapter 2 according to said process, varifocal imaging control unit 31 controls the second zoom lens 121 to corresponding long-focus 48mm place zoom, control the 3rd zoom lens 131 to short focus 44mm place zoom simultaneously, when the focal length of the second zoom lens 121 and the 3rd zoom lens 131 overlaps, channel to channel adapter control unit 32 control channel selector 2 selects the 3rd image processor 133 as signal input part, control the 3rd zoom lens 132 simultaneously and video/image optical imagery is carried out in Focussing to the position of 130mm, 3rd imageing sensor 132 obtains this optical imagery and is converted to initial video/electric image signal and exports the 3rd image processor 133 to, 3rd image processor 133 will receive this initial video/electric image signal and be converted into the video/image signal output of the video image standard meeting setting, the video signal that channel to channel adapter 2 selects reception the 3rd image processor 133 to export.
By the above-mentioned operating mechanism of the device of above-mentioned zoom lens imaging, for video image observer, it is seen that the video image of continuous vari-focus exports, its output video image is not distinguished with the device being equipped with single continuous magnification lens imaging.The burnt section configuration of each zoom lens in this device can realize optimal design under current technological conditions.Be F1.0 ~ F1.0 in the present embodiment, thus the attenuation of camera lens to illumination is dropped to minimum.In this implementation example, the logical light quantity at short Jiao Chu and focal length place can reach 1/ (1*1)=100%, that is loses without any illumination.In this case, the excellent low-light (level) performance that imageing sensor has had can be embodied completely.
Certainly, consider the factors such as such as implementation cost, device volume, the technical conditions of producer own, also can implement accommodation design as various in F1.0 ~ F1.2, F1.2 ~ F1.2, F1.0 ~ F1.4 etc.
In device second embodiment of the zoom lens imaging of the present invention shown in Fig. 2, be with the difference of above-mentioned first embodiment, first, second, and third varifocal imaging unit 11,12, first, second, and third image processor 113 is not comprised in 13,123,133, and connect image processor 4 at the output of channel to channel adapter 2.First, second, and third imageing sensor 112 in channel to channel adapter 2 and first, second, and third varifocal imaging unit, 122,132 connect, select first, second, and third imageing sensor 112,122, in 132, at least one is as signal input part, and channel to channel adapter 2 receives from first, second, and third imageing sensor 112,122, the initial video/electric image signal in 132 also exports image processor 4 to and is converted into video signal.
Certainly, according to the actual needs, the number of varifocal imaging unit also can be 2,4,5 ...
The present invention also provides a kind of formation method of zoom lens, comprises the steps:
S1. judge that channel to channel adapter 2 selects the current varifocal imaging unit as signal input part is corresponding whether to overlap with the burnt section of the varifocal imaging unit of subsequent time imaging, if not, then perform step S2, if so, then perform step S3.Such as, current imaging be the first varifocal imaging unit 11, subsequent time imaging be the second varifocal imaging unit 12, then judge that the first varifocal imaging unit 11 overlaps with the burnt section of the second varifocal imaging unit 12, if subsequent time imaging is the 3rd varifocal imaging unit 13, then judge that between the first image-generating unit 11 with the 3rd image-generating unit 13, burnt section does not overlap.
S2. the burnt section of the varifocal imaging unit of adjustment and current imaging has and to overlap and burnt section is positioned at the focal length of the intermediate zoom image-generating unit between the varifocal imaging unit of current imaging and the varifocal imaging unit of subsequent time imaging, and the focal length of the varifocal imaging unit of current imaging, intermediate zoom image-generating unit is overlapped with the focal length of the varifocal imaging unit of current time imaging, control channel selector selects intermediate zoom image-generating unit as signal input part simultaneously, gets back to step S1.Such as, the burnt section first adjusting the first varifocal imaging unit 11 overlaps with the burnt section of the second varifocal imaging unit 12, control channel selector 2 switches to selection second varifocal imaging unit 12 as signal input part by selection first varifocal imaging unit 11 as signal input part again, after getting back to step S1, judge that the burnt section of the second varifocal imaging unit 12 overlaps with the burnt section of the 3rd varifocal imaging unit 13, then perform step S3.
S3. adjust the focal length of the varifocal imaging unit of current imaging to overlap with the focal length of the varifocal imaging unit of subsequent time imaging, control unit control channel selector select the varifocal imaging unit of subsequent time imaging as signal input part.If current imaging is the first varifocal imaging unit 11, subsequent time imaging be the second varifocal imaging unit 12, then control channel selector 2 switches to selection second varifocal imaging unit 12 as signal input part by selection first varifocal imaging unit 11 as signal input part.If subsequent time imaging is the 3rd varifocal imaging unit 13, then control channel selector 2 switches to selection the 3rd varifocal imaging unit 13 as signal input part by selection second varifocal imaging unit 12 as signal input part.
The formation method of zoom lens also comprises the steps:
Select by first, second, third varifocal imaging unit 11,12 according to required focal length, first, second, third zoom lens 111,112 corresponding in 13, a zoom lens in 113 carries out video/image optical imagery.
Imageing sensor obtains this optical imagery and is converted to initial video/electric image signal and exports corresponding image processor to.
Image processor obtains this initial video/electric image signal and is converted into the video signal output of the video image standard meeting setting.
In another embodiment, also can obtain optical imagery by imageing sensor and be converted to initial video/electric image signal and export channel to channel adapter 2 to, export initialize signal to image processor 4 by channel to channel adapter 2 again, by image processor 4 initial video/electric image signal be converted into the video signal of the video image standard meeting setting and export.
In sum, at least plural varifocal imaging unit is used to carry out capture video or image, the burnt section of varifocal imaging unit increases progressively successively, and the burnt section of adjacent two varifocal imaging unit partially overlaps, thus ensure that the burnt segment limit of the device entirety of zoom lens imaging is enough large, and the long-focus of each varifocal imaging unit and the ratio of short focus less, each varifocal imaging unit can be made under prior art conditions to have little coke ratio, and then reduce the decay of ambient lighting.
Control unit controls the varifocal imaging unit of current imaging and the varifocal imaging unit of subsequent time imaging, and the varifocal imaging unit focal length between any two between the varifocal imaging unit of current imaging and the burnt section of the varifocal imaging unit of subsequent time imaging overlaps successively, also the varifocal imaging unit of the current imaging of control channel selector control unit switches to the varifocal imaging unit of subsequent time imaging as signal input part successively as signal input part, thus channel to channel adapter can be switched between different varifocal imaging unit, exported by channel to channel adapter again after selecting varifocal imaging unit corresponding to required focal length to carry out capture video image according to actual needs, make the burnt segment limit increasing varifocal imaging unit under the attenuation not increasing zoom lens, the attenuation of zoom lens to ambient light illumination is reduced under that is to say the varifocal imaging unit of the burnt section on a large scale, and the existing performance of imageing sensor can be realized at each focal length of above-mentioned zoom lens.
Understandable, above embodiment only have expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention; It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can carry out independent assortment to above-mentioned technical characterstic, can also make some distortion and improvement, these all belong to protection scope of the present invention; Therefore, all equivalents of doing with the claims in the present invention scope and modification, all should belong to the covering scope of the claims in the present invention.
Claims (10)
1. a device for zoom lens imaging, is characterized in that, comprises,
At least two varifocal imaging unit, described in each, the burnt section of varifocal imaging unit increases progressively successively, and the burnt section of adjacent two described varifocal imaging unit partially overlaps;
The channel to channel adapter be connected with described at least two varifocal imaging unit, exports as it for selecting the signal that described at least one, varifocal imaging unit inputs;
The control unit communicated to connect with described varifocal imaging unit and described channel to channel adapter respectively;
Described control unit overlaps successively for the varifocal imaging unit of varifocal imaging unit with subsequent time imaging that controls current imaging and the varifocal imaging unit focal length between any two between the varifocal imaging unit and the burnt section of the varifocal imaging unit of described subsequent time imaging of described current imaging, also controls described channel to channel adapter and switches to the varifocal imaging unit of described subsequent time imaging successively as signal input part by the varifocal imaging unit of described current imaging as signal input part.
2. the device of zoom lens imaging according to claim 1, is characterized in that, described varifocal imaging unit comprises zoom lens and imageing sensor,
Described zoom lens, for obtaining the optical imagery of video/image, wherein, the burnt section of the described zoom lens that varifocal imaging unit described in each is corresponding increases progressively successively, and the burnt section of adjacent two described zoom lens partially overlaps;
Described imageing sensor, is connected with described zoom lens, for receiving the optical imagery of the video/image of described zoom lens and being converted to initial video/electric image signal output.
3. the device of zoom lens imaging according to claim 2, is characterized in that, the device of described zoom lens imaging also comprises image processor,
Described image processor, is connected with described imageing sensor and described channel to channel adapter, for receive described imageing sensor export described initial video/electric image signal and be converted into the video/image standard meeting setting video signal export;
Or described image processor, is connected with described channel to channel adapter, for described initial video/electric image signal of receiving from described channel to channel adapter and the video signal being converted into the video/image standard meeting setting export.
4. the device of the zoom lens imaging according to Claims 2 or 3, is characterized in that, the focal length of described zoom lens and the ratio range of short Jiao are 1-5.
5. the device of zoom lens imaging according to claim 4, is characterized in that, described control unit comprises varifocal imaging control unit and channel to channel adapter control unit,
Described varifocal imaging control unit, be connected with described varifocal imaging unit and described channel to channel adapter control unit, for the varifocal imaging unit of the varifocal imaging unit and described subsequent time imaging that control described current imaging, and the varifocal imaging unit focal length between any two between the varifocal imaging unit and the burnt section of the varifocal imaging unit of described subsequent time imaging of described current imaging overlaps successively, also export selection and control signal to described channel to channel adapter control unit, using control described channel to channel adapter control unit select by described current imaging varifocal imaging unit as signal input part switch to successively the varifocal imaging unit of described subsequent time imaging as signal input part,
Described channel to channel adapter control unit, be connected with described varifocal imaging control unit and described channel to channel adapter, for receiving the selection control signal from described varifocal imaging control unit, using control described channel to channel adapter select by described current imaging varifocal imaging unit as signal input part switch to successively the varifocal imaging unit of described subsequent time imaging as signal input part.
6. the device of zoom lens imaging according to claim 4, is characterized in that, the coke ratio of described zoom lens is less than or equal to F2.8.
7. the device of zoom lens imaging according to claim 4, is characterized in that, the coke ratio of described zoom lens different in the device of described zoom lens imaging is identical or not identical.
8. a formation method for zoom lens, is characterized in that, comprises the steps:
A. judge that channel to channel adapter is selected whether to overlap with the burnt section of the varifocal imaging unit of subsequent time imaging as the current varifocal imaging unit that signal input part is corresponding, if not, then perform step B, if so, then perform step C;
B. the burnt section of the varifocal imaging unit of adjustment and current imaging has and to overlap and burnt section is positioned at the focal length of the intermediate zoom image-generating unit between the varifocal imaging unit of described current imaging and the varifocal imaging unit of described subsequent time imaging, and the focal length of the varifocal imaging unit of described current imaging, described intermediate zoom image-generating unit is overlapped with the focal length of the varifocal imaging unit of described current time imaging, control described channel to channel adapter selects described intermediate zoom image-generating unit as signal input part simultaneously, gets back to steps A;
C. the focal length adjusting the varifocal imaging unit of described current imaging overlaps with the focal length of the varifocal imaging unit of described subsequent time imaging, control unit control channel selector select the varifocal imaging unit of described subsequent time imaging as signal input part.
9. the formation method of zoom lens according to claim 8, is characterized in that, the formation method of described zoom lens also comprises the steps:
The optical imagery of video/image is obtained by zoom lens;
Described imageing sensor obtains the optical imagery of described video/image, is converted to initial video/electric image signal, and exports image processor to;
Described image processor obtains described initial video/electric image signal and is converted into the video signal output of the video/image standard meeting setting.
10. the formation method of zoom lens according to claim 9, is characterized in that, the focal length of described zoom lens and the ratio range of short Jiao are 1-5.
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| CN201510308643.7A CN104967775B (en) | 2015-06-05 | 2015-06-05 | A kind of device and method of zoom lens imaging |
| PCT/CN2016/084308 WO2016192627A1 (en) | 2015-06-05 | 2016-06-01 | Imaging device and method of zoom lens |
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| CN201510308643.7A CN104967775B (en) | 2015-06-05 | 2015-06-05 | A kind of device and method of zoom lens imaging |
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| WO2016192627A1 (en) | 2016-12-08 |
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