CN204258928U - Optical field imaging system - Google Patents
Optical field imaging system Download PDFInfo
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- CN204258928U CN204258928U CN201420648037.0U CN201420648037U CN204258928U CN 204258928 U CN204258928 U CN 204258928U CN 201420648037 U CN201420648037 U CN 201420648037U CN 204258928 U CN204258928 U CN 204258928U
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Abstract
The utility model provides a kind of optical field imaging system, comprising: microlens array, light beam guidance unit, image-generating unit and graphics processing unit, wherein microlens array, comprises multiple lenticule unit, for focused beam; Light beam guidance unit, for being guided by the light beam by described microlens array imaging, makes the light that angle is larger between the optical axis of described optical field imaging system be transmitted on described image-generating unit by described microlens array; Image-generating unit, is arranged on the focal plane of described microlens array, carrys out photosensitive imaging for receiving by the light of microlens array transmission; Graphics processing unit, processes for the signal of telecommunication collected by described image-generating unit.According to optical field imaging system of the present utility model, structure is simple, can be optical field imaging collection light with great visual angle, thus effectively expand the angle of visual field of optical field imaging system.
Description
Technical field
The utility model relates to optical field imaging technical field, particularly a kind of optical field imaging system with Large visual angle angle.
Background technology
The imaging process of traditional cameras, it is mode three dimensions scenery being taken to two-dimensional projection, just the intensity of light is added up on detector pixel, that is only considered the spatial distribution in picture plane of object, and discarded the direction of propagation information of light, and limit the remoldability of image.
Compare, optical field imaging technology then remains the possibility reinvented image, can obtain the image information of flexibility, diversification more, has application prospect widely.As by the digital refocusing technology to light field picture, the two dimensional image of focusing at different depth can be calculated, realize the function of " first take pictures and focus afterwards "; Improve focusing power, break away from out of focus, the burnt puzzlement of race; Increase the flexibility to picture processing; 3D display is realized by light field data synthesis multi-view image; By the inverting to light field data, digitlization correcting optical system aberration, reduces Optical System Design and difficulty of processing etc.Can say, optical field imaging technology can extend to all fields being applied to optical imagery at present, expands the amount of information that existing optical image technology can obtain.
For optical field imaging system, the size of the angle of visual field determines the field range of optical field imaging system, and the angle of visual field is larger, and the visual field is larger, can photograph more image.At present, have the camera of such as 4*4 300,000 pixels to be combined into an optical field imaging system, the resolution of finally total optical field imaging system only has 350,000, and it is repetition that each camera photographs a large amount of information.
Therefore, need a kind of angle of visual field that effectively can expand optical field imaging system to put forward high-resolution apparatus and method.
Utility model content
According to an aspect of the present utility model, provide a kind of optical field imaging system, comprising: microlens array, light beam guidance unit, image-generating unit and graphics processing unit, wherein: microlens array, comprise multiple lenticule unit, for focused beam; Light beam guidance unit, for being guided by the light beam by described microlens array imaging, makes the light that angle is larger between the optical axis of described optical field imaging system be transmitted on described image-generating unit by described microlens array; Image-generating unit, is arranged on the focal plane of described microlens array, carrys out photosensitive imaging for receiving by the light of microlens array transmission; Graphics processing unit, processes for the signal of telecommunication collected by described image-generating unit.
Preferably, described light beam guidance unit comprises shade, and described shade, between described microlens array and described image-generating unit, comprises the sub-shade of multiple tubular structures be made up of light-proof material, for guiding and filtered beam; Each lenticule unit in described microlens array one of them tubular structure all corresponding, the opening of described shade one end is connected with the edge seal of lenticule unit, and other end opening is connected on the corresponding region of described image-generating unit.
Preferably, described sub-shade is far away apart from described imaging optical axis, and the angle between the central axis of described sub-shade and described imaging optical axis is larger.
Preferably, described light beam guidance unit comprises anaclasis unit, and described anaclasis unit is positioned at the opposite side of described microlens array relative to described image-generating unit, for entering after the light refraction within the scope of greater angle in described microlens array.
Preferably, described anaclasis unit is selected from the combination of at least one or more in plano-concave lens, biconcave lens, meniscus, broken-line type lens or deviation prism array.
Preferably, described anaclasis unit is a lateral section is the multistage broken line composite type broken-line type lens recessed from edge to center.
Preferably, each section of broken line of described broken-line type lens is designed to correspondingly arrange with one of the lenticule unit in described microlens array or a part and design its deflection angle to form wide-angle image.
Preferably, also comprise image repetition unit, described image repetition unit according to the deflection angle of every sub-prism in deviation prism array come corresponding reappear each sub-image-generating unit become the home position of each light in image.
Preferably, the deflection angle of each sub-prism in described deviation prism array is reduced to center gradually by edge, and each discrete being arranged to of sub-prism is arranged corresponding in the sub-lens in microlens array or a part and design its deflection angle to form wide-angle image.
Preferably, described system is also included in the diaphragm unit arranged between described microlens array and described image-generating unit, the lenticule unit one_to_one corresponding in each diaphragm of described diaphragm unit and described microlens array.
According to the optical field imaging system of improvement of the present utility model, Large visual angle angle light field image can be obtained.
Accompanying drawing explanation
With reference to the accompanying drawing of enclosing, the following description by the utility model execution mode is illustrated by the more object of the utility model, function and advantage, wherein:
Fig. 1 (a)-Fig. 1 (b) schematically shows optical system structure according to the optical field imaging system of the utility model embodiment and imaging schematic diagram;
Fig. 1 (c) shows the imaging schematic diagram of the optical field imaging system with anaclasis unit according to another embodiment of the utility model;
Fig. 1 (d) shows the imaging schematic diagram of the optical field imaging system with anaclasis unit and shade according to the another embodiment of the utility model;
Fig. 2 (a)-Fig. 2 (b) illustrates without light beam guidance unit and the optical field imaging system imaging light path comparison diagram being furnished with light beam guidance unit;
Fig. 3 schematically shows the structural representation of several execution modes of anaclasis unit;
Fig. 4 schematically shows the structural representation of diaphragm unit.
Embodiment
By reference to one exemplary embodiment, the purpose of this utility model and function and the method for realizing these objects and function will be illustrated.But the utility model is not limited to following disclosed one exemplary embodiment; Can be realized it by multi-form.The essence of specification is only help various equivalent modifications Integrated Understanding detail of the present utility model.
Hereinafter, embodiment of the present utility model will be described with reference to the drawings.In the accompanying drawings, identical Reference numeral represents same or similar parts, or same or similar step.
Comprise microlens array, light beam guidance unit, image-generating unit and graphics processing unit according to optical field imaging system of the present utility model, wherein microlens array comprises multiple lenticule unit, for focused beam; Light beam guidance unit is used for the light beam by described microlens array imaging to guide, and makes the light that angle is larger between the optical axis of described optical field imaging system be transmitted on described image-generating unit by described microlens array; Image-generating unit, is arranged on the focal plane of described microlens array, carrys out photosensitive imaging for receiving by the light of microlens array transmission; Graphics processing unit, processes for the signal of telecommunication collected by described image-generating unit.Several specific embodiments referring to Fig. 1 are described all parts.
See Fig. 1 (a), the optical field imaging system 100 according to the utility model embodiment comprises successively along imaging direction of principal axis: microlens array 101, shade 103 and image-generating unit 102, and graphics processing unit 104.Object 106 under the irradiation of light source 107, by microlens array 101, imaging on image-generating unit 102 under the guiding of shade 103.In the present embodiment, light beam guidance unit realizes in the mode of shade 103.
Microlens array 101, comprises multiple lenticule unit, and for focused beam, lenticular shape can be circular or square.According to an embodiment of the present utility model, the focal length of each lenticule unit of microlens array 101 can be arranged to identical, also can be different, can collect the optical information for imaging of different distance.
Image-generating unit 102, is arranged on the focal plane of microlens array 101, carrys out photosensitive imaging for receiving by the light of microlens array transmission.The transducer of image-generating unit 102 can be such as CCD or CMOS, for receiving imaging light intensity signal, changing the signal of telecommunication into and storing.According to an embodiment of the present utility model, image-generating unit 102 is preferably made up of multiple sub-image-generating unit.Each imaging subelement is arranged respectively to each lenticule unit corresponding to microlens array 101.
Shade 103, comprises the sub-shade of multiple tubular structures be made up of light-proof material, between described microlens array 101 and described image-generating unit 102, for guiding the trend of light beam.The sub-shade of each tubular structure corresponds to a lenticule unit of microlens array 101.Fig. 1 (b) schematically shows the stereochemical structure of shade 103.Wherein illustrate only the sub-shade 103 of four tubular structures of four lenticule unit 101 and corresponding shade, and image-generating unit 102.As shown in Fig. 1 (b), shade 103 is equivalent to an optical channel, mutually disturbs, serve the effect of filtering and guiding between the light beam after using described shade 103 can prevent contiguous microlens unit from focusing on.The sub-shade of one of them tubular structure of all corresponding shade 103 of each lenticule unit, the shape at its two ends and lenticular mating shapes, one end is connected with the edge seal of lenticule unit, and other end opening is connected on the corresponding region of image-generating unit 102.
According to an embodiment of the present utility model, the shape of shade 103 can amass identical tubular or the different taper of two ends area for both ends of the surface.Such as, the aperture area of shade 103 one end be connected with lenticule unit can be greater than the area of other end opening.If lenticule unit is circular, the shape of shade 103 is the inconsistent cylinder of both ends open area; If lenticule unit is square, the collision of shade 103 is the inconsistent square tube of both ends open area.
According to an embodiment of the present utility model, the sub-shade of multiple tubular structures of shade 103 tilts certain angular array respectively.Such as, as shown in Fig. 1 (a), when shade 103 axis and optical axis coincidence, this shade 103 does not have angle of inclination relative to optical axis, and shade 103 and optical axis from must more away from, the angle of inclination of shade 103 is larger.According to an embodiment of the present utility model, angle of inclination (angle namely between shade 103 and the optical axis) minimum angles of shade 103 be 0 degree (i.e. shade 103 now and optical axis coincidence), and the angle of inclination of shade 103 (and the angle between optical axis) is maximum reaches 60 degree.
Graphics processing unit 104, processes for the signal of telecommunication collected by image-generating unit 102, to present required image.
Fig. 1 (c) shows the imaging schematic diagram of the optical field imaging system according to another embodiment of the utility model.In this embodiment, light beam guidance unit realizes in the mode of anaclasis unit 108.As shown in Fig. 1 (c), described anaclasis unit 108 is positioned at the opposite side of microlens array 101 relative to described image-generating unit 102.Described anaclasis unit 108 is arranged with the central microlens unit common optical axis of described microlens array 101.Light storage within the scope of greater angle is come in by refractive Iy by anaclasis unit 108, and by the imaging on image-generating unit 102 of described microlens array 102.Object 106, under the irradiation of light source 107, passes through anaclasis unit 108 and microlens array 101, imaging on image-generating unit 102 successively.
Fig. 1 (d) shows the imaging schematic diagram of the optical field imaging system according to the another embodiment of the utility model.In this embodiment, the mode that light beam guidance unit combines with anaclasis unit 108 and shade 103 realizes.As shown in Fig. 1 (d), described anaclasis unit 108 is positioned at the opposite side of microlens array 101 relative to described image-generating unit 102.Described anaclasis unit 108 is arranged with the central microlens unit common optical axis of described microlens array 101.Light storage within the scope of greater angle is come in by refractive Iy by anaclasis unit 108, and by the imaging on image-generating unit 102 of described microlens array 102.Described shade 103 is between described microlens array 101 and described image-generating unit 102.The embodiment that the concrete configuration of shade 103 and the above-mentioned Fig. 1 (a) of structural reference describe with Fig. 1 (b).Object 106, under the irradiation of light source 107, passes through anaclasis unit 108 and microlens array 101, imaging on image-generating unit 102 successively.
Fig. 2 (a)-Fig. 2 (b) illustrates respectively without light beam guidance unit and the imaging optical path comparison diagram of optical field imaging system being furnished with light beam guidance unit.As Fig. 2 (a), if do not arrange light beam guidance unit, the angle of visual field of whole optical field imaging system 100 is θ
1, after edge-light incidence, do not form image by microlens array 101 at image-generating unit 102.Compare, as Fig. 2 (b), if arrange light beam guidance unit in the light path of microlens array 101, anaclasis unit 108 is passed through to center deviation after edge-light oblique incidence, or incide on microlens array 101 by the guiding of shade 103, and focus on image-generating unit 102 and form image, ambient light within the scope of greater angle can be come in by refractive Iy storage like this and by microlens array 101 imaging, now the angle of visual field of whole optical field imaging system 100 expands as θ
2, θ
2> θ
1, thus improve the angle of visual field of optical field imaging system 100.Wherein θ 2 can reach about 150-180 degree.
Now, known see Fig. 2 (a)-Fig. 2 (b), PO is each lenticule scene image without obtaining during light beam guidance unit, PO as visible in Fig. 2 (a) is overlapping, each lenticule scene image that PN obtains when being and being furnished with light beam guidance unit, PN as visible in Fig. 2 (a) is that dispersion is nonoverlapping.The known size by design light beam guidance unit of those skilled in the art can make each lenticule imaging reduce the overlap of captured picture as far as possible, ensures panoramic imagery, without omitting imaging within the scope of the whole angle of visual field simultaneously.
Fig. 3 schematically shows several embodiments of preposition anaclasis unit 108, such as single plano-concave lens (A in Fig. 3), biconcave lens (B in Fig. 3), meniscus (C in Fig. 3), broken-line type lens (D in Fig. 3) or deviation prism array (E and F in Fig. 3); But be not limited to these form, as long as medium or the structure of incident light anaclasis function can be realized.
It is emphasized that, the similar above-mentioned plano-concave of broken-line type lens of the D indication in Fig. 3, concave-concave or concave-convex lens, just the cross section of the recessed or convex surface of its both sides is the combination of the multistage broken line be recessed into gradually to center from edge, and each section of broken line is designed to in the lenticule unit in microlens array or a part is corresponding arranges, and design the deflection angle of every section of broken line lens according to the imaging requirements forming more Large visual angle angle image.According to the utility model, also comprise an image repetition unit in addition, image repetition unit also needs the home position carrying out corresponding each light conversed in become image according to the deflection angle of every section of broken line lens when the image of each sub-image-generating unit of extraction image-generating unit, to obtain real scene image.
Same, deviation prism array in E and F in Fig. 3 is arranged by multiple discrete sub-prism array, wherein the deflection angle of each sub-prism is reduced to center gradually by edge, and each discrete being arranged to of sub-prism corresponds in the sub-lens in microlens array 101 or the corresponding layout of a part, and design the deflection angle of every section of broken line lens according to the imaging requirements forming more Large visual angle angle image.According to the utility model, also comprise an image repetition unit in addition, image repetition unit also needs the home position carrying out corresponding each light conversed in become image according to the deflection angle of every sub-prism when the image of each sub-image-generating unit of extraction image-generating unit, to obtain real scene image.
Those skilled in the art can according to the above-mentioned deflection angle of normal optical method designed, designed, as long as image can reduce overlap and without omitting imaging in whole visual field as far as possible.
So, according to optical field imaging system 100 of the present utility model, there is the larger angle of visual field, more scene image can be gathered, in addition, owing to have employed anaclasis unit, do not need the assembly optical system in conventional optical field imaging system, volume and the thickness of whole device can be reduced.
According to another embodiment of the present utility model, diaphragm unit 109 can be placed between anaclasis unit 108 and microlens array 101, as shown in Figure 4.Diaphragm unit 109 is orifice plates, and each hole is corresponding with the single lenticular position of microlens array 101, reduces the light interference of contiguous microlens unit, improves image quality.Aperture need not particularly circular port, such as, can be the polygonal shapes such as hexagon.
Element of the present utility model is simply described in the accompanying drawings, and the distance between the size of these key elements, shape and key element not necessarily reflects actual situation.
According to optical field imaging system of the present utility model, structure is simple, can be optical field imaging collection light with great visual angle, thus effectively expand the angle of visual field of optical field imaging system.
Should be appreciated that description and the follow-up detailed description of aforementioned cardinal principle are exemplary illustration and explanation, should not be used as the restriction to the claimed content of the utility model.
In conjunction with the explanation of the present utility model disclosed here and practice, other embodiments of the present utility model are all easy to expect and understand for those skilled in the art.Illustrate and embodiment be only considered to exemplary, true scope of the present utility model and purport limited by claim.
Claims (10)
1. an optical field imaging system, comprising: microlens array, light beam guidance unit, image-generating unit and graphics processing unit, wherein:
Microlens array, comprises multiple lenticule unit, for focused beam;
Light beam guidance unit, for being guided by the light beam by described microlens array imaging, makes the light that angle is larger between the optical axis of described optical field imaging system be transmitted on described image-generating unit by described microlens array;
Image-generating unit, is arranged on the focal plane of described microlens array, carrys out photosensitive imaging for receiving by the light of microlens array transmission;
Graphics processing unit, processes for the signal of telecommunication collected by described image-generating unit.
2. optical field imaging system according to claim 1, it is characterized in that: described light beam guidance unit comprises shade, described shade, between described microlens array and described image-generating unit, comprises the sub-shade of multiple tubular structures be made up of light-proof material, for guiding and filtered beam; Each lenticule unit in described microlens array one of them tubular structure all corresponding, the opening of described shade one end is connected with the edge seal of lenticule unit, and other end opening is connected on the corresponding region of described image-generating unit.
3. optical field imaging system according to claim 2, is characterized in that: described sub-shade is far away apart from described imaging optical axis, and the angle between the central axis of described sub-shade and described imaging optical axis is larger.
4. optical field imaging system according to claim 1 and 2, it is characterized in that: described light beam guidance unit comprises anaclasis unit, described anaclasis unit is positioned at the opposite side of described microlens array relative to described image-generating unit, for entering after the light refraction within the scope of greater angle in described microlens array.
5. optical field imaging system according to claim 4, is characterized in that: described anaclasis unit is selected from the combination of at least one or more in plano-concave lens, biconcave lens, meniscus, broken-line type lens or deviation prism array.
6. optical field imaging system according to claim 4, is characterized in that: described anaclasis unit is a lateral section is the multistage broken line composite type broken-line type lens recessed from edge to center.
7. optical field imaging system according to claim 6, is characterized in that: each section of broken line of described broken-line type lens is designed to and one of the lenticule unit in described microlens array or a part is corresponding arranges and design its deflection angle to form wide-angle image.
8. optical field imaging system according to claim 5, it is characterized in that: also comprise image repetition unit, described image repetition unit according to the deflection angle of every sub-prism in deviation prism array come corresponding reappear each sub-image-generating unit become the home position of each light in image.
9. optical field imaging system according to claim 5, it is characterized in that: the deflection angle of each sub-prism in described deviation prism array is reduced to center gradually by edge, and each discrete being arranged to of sub-prism is arranged corresponding in the sub-lens in microlens array or a part and designs its deflection angle to form wide-angle image.
10. optical field imaging system according to claim 1, it is characterized in that: described system is also included in the diaphragm unit arranged between described microlens array and described image-generating unit, the lenticule unit one_to_one corresponding in each diaphragm of described diaphragm unit and described microlens array.
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| CN201420648037.0U CN204258928U (en) | 2014-11-03 | 2014-11-03 | Optical field imaging system |
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| CN201420648037.0U CN204258928U (en) | 2014-11-03 | 2014-11-03 | Optical field imaging system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106254859A (en) * | 2016-01-18 | 2016-12-21 | 北京智谷睿拓技术服务有限公司 | Light field display control method and device, light field display device |
| CN106254858A (en) * | 2015-12-31 | 2016-12-21 | 北京智谷睿拓技术服务有限公司 | Light field display control method and device, light field display device |
| CN106375648A (en) * | 2015-08-31 | 2017-02-01 | 北京智谷睿拓技术服务有限公司 | Image collection control method and device |
| US10348947B2 (en) | 2016-09-07 | 2019-07-09 | Interdigital Ce Patent Holdings | Plenoptic imaging device equipped with an enhanced optical system |
| CN111856853A (en) * | 2020-08-17 | 2020-10-30 | 广东烨嘉光电科技股份有限公司 | Micro-lens array projection system of composite micro-prism |
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2014
- 2014-11-03 CN CN201420648037.0U patent/CN204258928U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106375648A (en) * | 2015-08-31 | 2017-02-01 | 北京智谷睿拓技术服务有限公司 | Image collection control method and device |
| CN106375648B (en) * | 2015-08-31 | 2019-05-21 | 北京智谷睿拓技术服务有限公司 | Image Acquisition control method and device |
| CN106254858A (en) * | 2015-12-31 | 2016-12-21 | 北京智谷睿拓技术服务有限公司 | Light field display control method and device, light field display device |
| CN106254858B (en) * | 2015-12-31 | 2018-05-04 | 北京智谷睿拓技术服务有限公司 | Light field display control method and device, light field display device |
| CN106254859A (en) * | 2016-01-18 | 2016-12-21 | 北京智谷睿拓技术服务有限公司 | Light field display control method and device, light field display device |
| US10197808B2 (en) | 2016-01-18 | 2019-02-05 | Beijing Zhigu Rui Tuo Tech Co., Ltd. | Light field display control method and apparatus, and light field display device |
| US10348947B2 (en) | 2016-09-07 | 2019-07-09 | Interdigital Ce Patent Holdings | Plenoptic imaging device equipped with an enhanced optical system |
| CN111856853A (en) * | 2020-08-17 | 2020-10-30 | 广东烨嘉光电科技股份有限公司 | Micro-lens array projection system of composite micro-prism |
| CN111856853B (en) * | 2020-08-17 | 2021-03-02 | 广东烨嘉光电科技股份有限公司 | Micro-lens array projection system of composite micro-prism |
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