CN103676036A - Multi-field-of-view bionic ommateum low-light-level imaging system based on multi-micro-surface optical fiber faceplate - Google Patents
Multi-field-of-view bionic ommateum low-light-level imaging system based on multi-micro-surface optical fiber faceplate Download PDFInfo
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Abstract
The invention relates to a multi-field-of-view bionic ommateum low-light-level imaging system based on a multi-micro-surface optical fiber faceplate and belongs to the technical field of optical imaging. By designing the multi-micro-surface optical fiber faceplate and a corresponding optical system and coupling the optical fiber faceplate with a CCD/CMOS image device, imaging of multiple sub-field of views can be achieved on the single image device; meanwhile, because all the field of views of the multi-micro-surface light cone/optical fiber faceplate can be partially overlaid, sub-images can be spliced into an image with a large field of view (>=100 degrees), and target three-dimensional information can be acquired through overlapping portions of all the sub-images. The low-light-level night vision imaging observation system is small in size, light in weight and large in field of view (>=100 degrees); the structure of the system is simplified, and the cost of the system is reduced.
Description
Technical field
The present invention relates to a kind of many visual fields bionic compound eyes Low Light Level Imaging System based on many micro-fibre faceplates, belong to optical image technology field.
Background technology
Artificial bionic compound eye technology is conducive to obtain the imaging system of miniaturization, lightweight, large visual field, and can obtain target three dimensional local information, can be widely used in the fields such as large visual field watch-dog, fast target positioning system, has broad application prospects.Therefore, all kinds of artificial bionic compound eye technology are one of focus directions of association area research.
Traditional large view field imaging system generally adopts fish eye lens or adopts multiple cameras.Fish eye lens volume weight is large, and imaging distortion is serious, can not obtain target three dimensional local information; Adopt large visual field observing system complex structure that multiple cameras forms, cost is high, data volume is large.Therefore, adopt artificial compound eye technology on single detector, to obtain a plurality of sub-view field image, be a kind of easy miniaturization, lightweight, low, the simple in structure feasible scheme of cost, and can obtain fast target three-dimensional information, there is boundless application prospect.
In recent years, Japan, Germany, Britain and domestic each research institution are studied artificial compound eye technology.Researchist adopts microlens array structure mostly both at home and abroad, and each lenticule becomes a low resolution subimage on detector, and subimage can adopt super resolution technology to synthesize a panel height image in different resolution.Japanese Jun Tanida in 2000 etc. propose a kind of TOMBO (ThinObservationModuleby BoundOptics) compound eye imaging system based on dragonfly compound eye structural.This system adopts dull and stereotyped microlens array, lenticule with survey that between flat board, to introduce intermediate light separation layer separated to realize each optical channel, be similar to as each passage adds an aperture diaphragm, control areas imaging.All passages are a same part for while object observing almost, and each passage can obtain the image of a low resolution, finally by the Super-resolution Reconstruction of the method realize target pictures such as Super-resolution Image Restoration.2004 Nian Gai research groups, on the basis of TOMBO system, have proposed again the color imaging method of compound eye.
The design concept of the German Research group that DuparreJ. in 2004 leads based on coordination compound eye, proposes and has made bionical coordination compound eye imaging system AACO (ArtificialAppositionCompoundEyeObjective).This system is also based on dull and stereotyped microlens array, structurally similar to TOMBO, and difference is that microlens array and optical confinement layer are produced in the both sides of same glass substrate, and is closely connected with light sensor array.The thickness of this system only has 320 μ m, and visual field can reach 21 °, F=2.6.After this, this group proposes again to replace common even microlens array with the microlens array of warbling, and is guaranteeing, under the prerequisite of image quality, system dimension further to be reduced.Also proposed " bunch eye " structure based on Superposition compound eye design concept the same year, it still adopts planar structure, but in system, has introduced field lens array, thereby obtains the visual field larger than AACO.What above bionic compound eyes adopted is dull and stereotyped microlens array, although structure easily realizes compared with curved surface, visual field is also restricted, generally about 20 ° of left and right.If need further to expand visual field, need after microlens array, add other auxiliary optical component.DuparreJ. wait people to utilize three layer flat plate microlens array to expand visual field to 70 ° * 15 °.Duparre J. in 2007 etc. for curved-surface structure, propose the artificial compound eye imaging system SACE of sphere (ShericalArtificialCompoundEye) coordination compound eye design concept.SACE is mainly by microlens array, relay optics and sensor array form, and for the first time microlens array is used for to curved-surface structure, utilize laser miniature carving technology microlens array 112 * 112 to be engraved in to groove surface or the convex surface of a thin meniscus lens, lenticule is corresponding one by one with sensor, by relay optics by image transfer to sensor array, visual field that each micro mirror is corresponding different, has formed a plurality of optical channels of different directions.SACE can obtain the imaging visual angle larger than AACO, and visual field reaches 38 ° * 38 °.
The Zhang Hongxin of applied optics National Key Laboratory of Changchun Inst. of Optics and Fine Mechanics, Chinese Academy of Sciences in 2006 etc. have designed a kind of plyability bionic compound eyes structure, the public same detector array of a plurality of ommatidiums, and a plurality of ommatidiums all have contribution to the brightness value of single pixel on detector.In this research, researchist uses Zemax to carry out trace to light path, and system has been carried out to initial analysis.
Within 2010, Sichuan University adopts and the similar structure of SACE, and the plano-convex BK7 glass of take is substrate, has designed spherical micro mirror array system.System is mainly comprised of plano-convex micro mirror array, separating layer and sensor array, not only visual field is expanded to 60 °, and the system of being convenient to is installed.In addition, system is without additional relay optical element, can direct imaging on flat surface sensor; The separating layer that system is introduced can limit areas imaging better, makes each visual field independence imaging.
The people such as the advanced Research of Integration Di Si of institute in Chinese Academy of Sciences Shenzhen in 2010 have carried out improving design to above-mentioned optical microlens array structure, propose to make the design proposal of non-homogeneous microlens array in curved surface substrate.The focal length of lens changes with the difference of its present position, to guarantee that each lens all can obtain good image quality on photo-detector.Ray tracing result shows, this scheme has obviously been improved the image quality of visual field, edge.
Adopt in the bionic compound eyes imaging system of microlens array realization, each aperture of lens is very little, some is even in micron dimension, the restriction that is subject to optics microfabrication precision and debugs level, add that supporting with it detector array also needs special processing, therefore this compound eye system also rarely practical application at present.
In recent years, also there is domestic certain company to propose to adopt the compound eye system architecture (patent publication No.: CN102819053A) of ball end face light cone fit lens array, but in this system architecture, lens numbers is many, size is little, be difficult to lay diaphragm between each lens, to guarantee that the light between each lens can isolate mutually, the unlikely image quality that affects.
Summary of the invention
The object of the invention is processing conditions restriction and image quality deficiency for existing bionic compound eyes system, propose a kind of many visual fields bionic compound eyes Low Light Level Imaging System based on many micro-fibre faceplates.
The design concept of bionic compound eyes imaging system of the present invention is: many micro-the optical fiber panel structures of design and corresponding optical system, fibre faceplate and CCD/CMOS image device are coupled, realization is carried out imaging to a plurality of sub-visual fields on single image device, simultaneously each visual field of many micro-light cone/fibre faceplates is can generating portion overlapping, make subimage can piece into the large visual field of width (>=100 °) image together, and can utilize the overlapping part of each number of sub images to obtain target three-dimensional information.
Many visual fields bionic compound eyes imaging system based on many micro-fibre faceplates, its composition comprises multiple aperture optical system, many micro-fibre faceplates, image intensifying CCD/CMOS, three-dimensional focus adjusting mechanism and image acquisition and processing plate.Wherein, image intensifying CCD/CMOS comprises image intensifier, coupled system and video camera; Image acquisition and processing plate comprises that image capture module, image piece module and target three-positional fix module together.
The annexation of above-mentioned each ingredient is: multiple aperture optical system is positioned at many micro-fibre faceplate upper ends, many micro-fibre faceplates are connected with the image intensifier direct-coupling of image intensifying CCD/CMOS, the image on a plurality of micro-via fibre optic image transmission to image intensifier cathode plane; Wherein, the image intensifier of image intensifying CCD/CMOS, coupled system and video camera are connected from top to bottom in turn; The image of video camera output reaches image processing board through video line.
Described multiple aperture optical system comprises n non-spherical lens, a plurality of diaphragm, a lens case support, and wherein lens case support adopts spherical lens bracket or turtleback shape lens bracket.N lens are for optical imagery, n lens are fixed on support, wherein, consider that in many micro-fibre faceplates, each micro-normal direction is different from shaft axis of optic fibre angular separation, n non-spherical lens focal length is identical, bore is different, for micro-the less less lens of employing bore of angle, for micro-the larger larger lens of employing bore of angle, the size of bore makes the imaging uniform-illumination on each micro-; Between adjacent two lens, use diaphragm interval, avoid image that each lens become to interfere with each other.
Described many micro-fibre faceplates are on ordinary optic fibre panel end face, to process n micro-, and micro-quantity is consistent with lens numbers.Requirement on machining accuracy is lower than ± 0.05mm.Lens in the corresponding multiple aperture optical system in each micro-position, realize imaging function jointly.The image that many micro-fibre faceplates obtain is optical system coupled or couple directly on image intensifier cathode plane by multiple aperture, by image intensifier, image is strengthened, and on image intensifier video screen, gets a distinct image.
Described image intensifying CCD/CMOS band fibre faceplate window, fibre faceplate window is positioned at image intensifier cathode plane position.Image exports coupled system to from image intensifier video screen, coupled system adopts optical coupling system or light cone coupled system, under the unconfined conditions such as system bulk, length, video screen output intensity, adopt optical coupled, system bulk, length, video screen output intensity are being required to adopt light cone to be coupled under more harsh condition.Video camera adopts ccd video camera or cmos camera.
Described image acquisition and processing plate comprises image processing algorithm, completes image acquisition, image is pieced together and target three-positional fix function.
Beneficial effect
The present invention realizes the lll night vision imaging system of a kind of miniaturization, lightweight, large visual field (>=100 °), and on single image device, realize the imaging of a plurality of sub-eye pattern pictures, and can utilize the overlapping part of each number of sub images to obtain target three-dimensional information, simplify system architecture, reduced system cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention is based on many visual fields bionic compound eyes Low Light Level Imaging System of many micro-fibre faceplates;
Fig. 2 is many micro-fibre faceplate Machine Design figure in embodiment; Wherein, (a) being side view, is (b) front elevation;
Fig. 3 is the structural representation of many micro-light cones in embodiment; Wherein, wherein, (a) being side view, is (b) front elevation;
Many micro-the fibre faceplates of label declaration: 1-, 2-multiple aperture optical system, 3-image intensifier, 4-CCD/CMOS video camera, the 5-light cone that be coupled, 6-three-dimensional focus adjusting mechanism, 7-optical mount, 8-camera lens mounting hole, 9-diaphragm.
Embodiment
In order to further illustrate object of the present invention, design proposal and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Specific implementation method described in the present embodiment and accompanying drawing are exemplary, only for explaining the present invention, rather than limitation of the present invention.
As shown in Figure 1, for of the present invention a kind of based on many many visual fields of micro-light cone/fibre faceplate, the embodiment of the simultaneous type that partly overlaps bionic compound eyes imaging system mainly by multiple aperture optical system, many micro-fibre faceplates, image intensifying CCD/CMOS, three-dimensional focus adjusting mechanism and image acquisition and processing plate, formed.
In the present embodiment, in described multiple aperture optical system, adopt 9 lens for optical imagery, 9 lens are fixed on a spherical lens bracket or Polyhedral lens bracket, each lens of optical system are directly with the diaphragm interval (as shown in Figure 2) that is installed on optical lens internal stent, in order to avoid each sub-eye pattern picture interferes with each other in imaging process.
Described many micro-fibre faceplate end faces are processed to 9 micro-, as shown in Figure 3.Each micro-with multiple aperture optical system in 9 lens corresponding matching form 9 son eyes, realize imaging function.
9 sub-eye pattern pictures pass picture to single CCD/CMOS image device through fibre faceplate, produce 9 little images in compound eye visual field on single imager part.9 sub-eye patterns look like to exist part overlapping, utilize overlapping part 9 number of sub images can be pieced into together to the large view field image of a width, and utilize the overlapping part of each sub-eye pattern picture, can realize binocular/multi-view stereo vision, and target location is judged.
Above-described specific descriptions; object, technical scheme and beneficial effect to invention further describe; institute is understood that; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the many visual fields bionic compound eyes Low Light Level Imaging System based on many micro-fibre faceplates, is characterized in that: comprise multiple aperture optical system, many micro-fibre faceplates, image intensifying CCD/CMOS, three-dimensional focus adjusting mechanism and image acquisition and processing plate; Wherein, image intensifying CCD/CMOS comprises image intensifier, coupled system and video camera;
The annexation of above-mentioned each ingredient is: multiple aperture optical system is positioned at many micro-fibre faceplate upper ends, many micro-fibre faceplates are connected with the image intensifier direct-coupling of image intensifying CCD/CMOS, the image on a plurality of micro-via fibre optic image transmission to image intensifier cathode plane; Wherein, the image intensifier of image intensifying CCD/CMOS, coupled system and video camera are connected from top to bottom in turn; The image of video camera output reaches image processing board through video line;
Described multiple aperture optical system comprises n non-spherical lens, a plurality of diaphragm, a lens case support, and wherein lens case support adopts spherical lens bracket or turtleback shape lens bracket; N non-spherical lens is fixed on support, wherein, in many micro-fibre faceplates, each micro-normal direction is different from shaft axis of optic fibre angular separation, n non-spherical lens focal length is identical, bore is different, for micro-the less less lens of employing bore of angle, for micro-the larger larger lens of employing bore of angle, the size of bore makes the imaging uniform-illumination on each micro-; Between adjacent two lens, use diaphragm interval;
Described many micro-fibre faceplates are on ordinary optic fibre panel end face, to process n micro-, and micro-quantity is consistent with lens numbers; The corresponding multiple aperture optical system lens in each micro-position, common imaging; The image that many micro-fibre faceplates obtain is optical system coupled or couple directly on image intensifier cathode plane by multiple aperture, by image intensifier, image is strengthened, and on image intensifier video screen, gets a distinct image;
Described image intensifying CCD/CMOS band fibre faceplate window, fibre faceplate window is positioned at image intensifier cathode plane position; Image exports coupled system to from image intensifier video screen, and coupled system adopts optical coupling system or light cone coupled system;
Described image acquisition and processing plate comprises image processing algorithm, completes image acquisition, image is pieced together and target three-positional fix function.
2. the many visual fields bionic compound eyes Low Light Level Imaging System based on many micro-fibre faceplates according to claim 1, is characterized in that: micro-requirement on machining accuracy is lower than ± 0.05mm.
3. the many visual fields bionic compound eyes Low Light Level Imaging System based on many micro-fibre faceplates according to claim 1, it is characterized in that: under the unconfined conditions such as system bulk, length, video screen output intensity, adopt optical coupled, system bulk, length, video screen output intensity are being required to adopt light cone to be coupled under more harsh condition; Video camera adopts ccd video camera or cmos camera.
4. the many visual fields bionic compound eyes Low Light Level Imaging System based on many micro-fibre faceplates according to claim 1, is characterized in that: each visual field of many micro-fibre faceplates is can generating portion overlapping, pieces into the image of width visual field >=100 ° together.
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Cited By (16)
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| CN104165626A (en) * | 2014-06-18 | 2014-11-26 | 长春理工大学 | Bionic facetted eye imaging target positioning system |
| CN104599322A (en) * | 2015-02-16 | 2015-05-06 | 杭州清渠科技有限公司 | Super-resolution three-dimensional image reconstruction method based on fly-eye lens |
| CN104601871A (en) * | 2015-02-16 | 2015-05-06 | 杭州清渠科技有限公司 | Image acquiring method based on fly-eye lens |
| CN105578003A (en) * | 2015-12-17 | 2016-05-11 | 沈阳理工大学 | Multichannel large-visual-angle bionic compound eye imaging detection apparatus |
| CN105911640A (en) * | 2016-06-01 | 2016-08-31 | 浙江工商大学 | All-fiber bionic compound eye imaging system |
| CN106526606A (en) * | 2016-10-13 | 2017-03-22 | 中国科学院上海技术物理研究所 | Double-channel smart quantum dot laser space trajectory detection system based on bionic compound eyes |
| CN106546994A (en) * | 2016-10-13 | 2017-03-29 | 中国科学院上海技术物理研究所 | Airbound target detection method based on two-way alertness quantum dot compound eye system |
| CN104375270B (en) * | 2014-09-22 | 2017-05-17 | 北京理工大学 | Design method of multi-aperture partial overlapping bionic compound eye imaging optical system |
| CN107302695A (en) * | 2017-05-31 | 2017-10-27 | 天津大学 | A kind of electronics compound eye system based on bionic visual mechanism |
| CN108181666A (en) * | 2017-12-26 | 2018-06-19 | 中国科学院上海技术物理研究所 | A kind of wide area covering narrow multiple spot emphasis scouts detection technique |
| CN108965678A (en) * | 2018-09-04 | 2018-12-07 | 北京理工大学 | A kind of multiple aperture becomes the bionical thermal imaging method of spatial resolution and device |
| CN109870805A (en) * | 2019-04-12 | 2019-06-11 | 吉林大学 | A kind of Conformal Optical System and its design method based on multiple aperture |
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| CN114559983A (en) * | 2020-11-27 | 2022-05-31 | 南京拓控信息科技股份有限公司 | Omnibearing dynamic three-dimensional image detection device for subway train body |
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| CN104165626A (en) * | 2014-06-18 | 2014-11-26 | 长春理工大学 | Bionic facetted eye imaging target positioning system |
| CN104165626B (en) * | 2014-06-18 | 2019-08-13 | 长春理工大学 | Bionic compound eyes imageable target positioning system |
| CN104375270B (en) * | 2014-09-22 | 2017-05-17 | 北京理工大学 | Design method of multi-aperture partial overlapping bionic compound eye imaging optical system |
| CN104599322A (en) * | 2015-02-16 | 2015-05-06 | 杭州清渠科技有限公司 | Super-resolution three-dimensional image reconstruction method based on fly-eye lens |
| CN104601871A (en) * | 2015-02-16 | 2015-05-06 | 杭州清渠科技有限公司 | Image acquiring method based on fly-eye lens |
| CN109874334A (en) * | 2015-07-17 | 2019-06-11 | 生物辐射实验室股份有限公司 | Contact imaging device for fluorescent applications |
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| CN105911640A (en) * | 2016-06-01 | 2016-08-31 | 浙江工商大学 | All-fiber bionic compound eye imaging system |
| CN106526606A (en) * | 2016-10-13 | 2017-03-22 | 中国科学院上海技术物理研究所 | Double-channel smart quantum dot laser space trajectory detection system based on bionic compound eyes |
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| CN106546994B (en) * | 2016-10-13 | 2019-03-01 | 中国科学院上海技术物理研究所 | Airbound target detection method based on two-way alertness quantum dot compound eye system |
| CN106546994A (en) * | 2016-10-13 | 2017-03-29 | 中国科学院上海技术物理研究所 | Airbound target detection method based on two-way alertness quantum dot compound eye system |
| CN107302695A (en) * | 2017-05-31 | 2017-10-27 | 天津大学 | A kind of electronics compound eye system based on bionic visual mechanism |
| CN108181666A (en) * | 2017-12-26 | 2018-06-19 | 中国科学院上海技术物理研究所 | A kind of wide area covering narrow multiple spot emphasis scouts detection technique |
| CN108965678A (en) * | 2018-09-04 | 2018-12-07 | 北京理工大学 | A kind of multiple aperture becomes the bionical thermal imaging method of spatial resolution and device |
| CN109870805A (en) * | 2019-04-12 | 2019-06-11 | 吉林大学 | A kind of Conformal Optical System and its design method based on multiple aperture |
| CN110595625A (en) * | 2019-09-17 | 2019-12-20 | 北京理工大学 | Cross-shaped five-aperture view field partially-overlapped bionic thermal imaging system |
| CN110769135A (en) * | 2019-10-17 | 2020-02-07 | 天津大学 | Bionic compound eye image acquisition device |
| CN114559983A (en) * | 2020-11-27 | 2022-05-31 | 南京拓控信息科技股份有限公司 | Omnibearing dynamic three-dimensional image detection device for subway train body |
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