CN107589551B - A kind of multiple aperture polarization imaging device and system - Google Patents
A kind of multiple aperture polarization imaging device and system Download PDFInfo
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- CN107589551B CN107589551B CN201710605374.XA CN201710605374A CN107589551B CN 107589551 B CN107589551 B CN 107589551B CN 201710605374 A CN201710605374 A CN 201710605374A CN 107589551 B CN107589551 B CN 107589551B
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Abstract
The invention discloses a kind of multiple aperture polarization imaging devices, comprising: micro lens arrays, including several micro lens are distributed in the first ball-type curved surface, for receiving external object light information；Detector array, positioned at the micro lens arrays rear, including several detectors, the detector is arranged in a one-to-one correspondence with the micro lens, it is distributed in the second ball-type curved surface concentric with the first ball-type curved surface, for being imaged to by the target light information of the micro lens, the first image information is obtained；At least three polarizing films are located in front of the micro lens arrays, are distributed at the micro lens arrays center, micro lens at each corresponding center of the polarizing film, for obtaining second image information in different polarization direction；Wherein, there is micro lens the visual field of estimated rate to be overlapped at two adjacent centers.The device of the invention can accurately obtain target position information, strength information and target materials information.
Description
Technical field
The present invention relates to photodetection field, in particular to a kind of multiple aperture polarization imaging device and system.
Background technique
Current main polarization imaging detection mode has timing method, beam splitter light splitting, multiple aperture large area array method and point aperture
Imaging.Timing method is the imaging technique based on timesharing, before polarizing film is fixed on imaging system by this method, passes through manually/electricity
Dynamic rotatory polarization piece obtains the image of different polarization states to different linear polarizations, and this method is simple and easy, real-time
It is poor, it can not be to the scene of variation or the target imaging of movement.The polarization imaging technology of spectroscope light splitting uses polarization spectro
Target beam is divided into multi beam polarised light by prism or beam splitter and more polarizing films, and to same field by the way of multi-detector
Scape real time imagery, a kind of polarization state of each usual detector measurement scene, but due to being increased by the way of multichannel beam splitting
Optical path loss, and the light energy sharp fall that single channel detects are added, detection difficulty increases.
Patent CN101806959 discloses a kind of real-time small polarization imaging device, and the device is by being placed on lens array
4 polarizing films and a large area array detector after column obtain 4 width polarization figure simultaneously, since the optical axis of 4 lens is not same
On straight line, the image quality of 4 width images is difficult to synchronization when being received with the same large area array detector, also likely sends out
The case where raw image planes overlapping.
Patent CN102944937 discloses one kind point aperture polarized imaging system, which is obtained using polarization chip arrays
The polarization information of target, but telephoto objective, optical filter, field stop, field lens and standard before chip arrays are polarized in above-mentioned patent
Straight module is all made of same optical path, and the segmentation aperture aperture Hou Ge luminous energy is restricted, while the common information of each subgraph is less,
It is difficult to carry out polarization manipulation.
In conclusion prior art image quality is low, polarization manipulation is complicated, cause accurately obtain target position letter
Breath, strength information and target materials information.
Summary of the invention
The invention reside in the above-mentioned deficiency for overcoming the prior art, target position information, strong can accurately be obtained by providing one kind
Spend the multiple aperture polarization imaging device and system of information and target materials information.
In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is that:
A kind of multiple aperture polarization imaging device, comprising:
Micro lens arrays, including several micro lens are distributed in the first ball-type curved surface, for receiving external object light letter
Breath；
Detector array is located at the micro lens arrays rear, including several detectors, the detector and the micro mirror
Head is arranged in a one-to-one correspondence, and is distributed in the second ball-type curved surface concentric with the first ball-type curved surface, for by described micro-
The target light information of camera lens is imaged, and the first image information is obtained；The micro lens arrays and the detector array structure
At micro- camera array；
At least three polarizing films are located in front of the micro lens arrays, are distributed at the micro lens arrays center, often
Micro lens at a corresponding center of the polarizing film, for obtaining second image information in different polarization direction；
Wherein, there is micro- camera lens the visual field of estimated rate to be overlapped at two adjacent centers.
Further, the detector is located at the focal plane of corresponding micro lens.
Further, the detector array is classified as face battle array cmos detector.
Further, further include turntable, connect micro- camera array, for being rotated, be located at target described micro-
Visual field overlapping region at lens array center.
Further, the visual field Duplication of micro- camera lens is 30%-80% at two adjacent centers.
Present invention simultaneously provides a kind of multiple aperture polarized imaging systems, including imaging device of the present invention, further includes:
Micro- camera control module connects the detector array, for controlling each detector acquisition described first
Image information；
Target search module connects micro- camera control module, for according to the first image acquisition of information target
Position；
Polarization module connects micro- camera control module, is used for according to the first image information to visual field
Target in overlapping carries out Polarization and obtains the second image information, is believed according to the second image information acquisition target materials
Breath；
Polarization rebuilds module, connects the Polarization module, is used for according to second image information to visual field weight
Target in folding carries out polarization reconstruction, obtains reconstruction image information.
Further, further includes:
Object judgement module sends the mesh when for judging that the target materials information is consistent with predetermined material information
Cursor position is to target tracking module；
The target tracking module, for being tracked to target.
Further, micro- camera control module is used to control the exposure parameter of each detector.
Further, the exposure parameter includes the time of exposure and/or time for exposure.
Compared with prior art, beneficial effects of the present invention are as follows:
Multiple aperture polarization imaging device of the invention corresponds to multi-detector using multiple optical apertures, when to scene capture,
Single aperture light energy is larger, realizes that big view field imaging and center bore visual field are overlapped using visual field overlapping, realizes small field of view
High-resolution imaging, the accuracy with higher when carrying out wide area target search then can accurately obtain target position letter
Breath, strength information and target materials information.
Detailed description of the invention
Fig. 1 show multiple aperture polarization imaging device functional block diagram of the invention.
Fig. 2 show multiple aperture polarized imaging system module frame chart of the invention.
Fig. 3 show the multiple aperture polarized imaging system module frame chart of another embodiment of the present invention.
Fig. 4 show the index path of a micro lens of center bore of the present invention.
Fig. 5, which is shown, carries out emulation life with a micro lens of the Zemax optical design software to center bore in the present invention
At modulation transfer function curve graph.
Fig. 6 show the index path of a micro lens in edge aperture of the present invention.
Fig. 7, which is shown, carries out emulation generation to one, edge aperture micro lens in the present invention with Zemax optical design software
Modulation transfer function curve graph.
Specific embodiment
The present invention is described in further detail With reference to embodiment.But this should not be interpreted as to the present invention
The range of above-mentioned theme is only limitted to embodiment below, all that model of the invention is belonged to based on the technology that the content of present invention is realized
It encloses.
Embodiment one:
Fig. 1 show multiple aperture polarization imaging device functional block diagram of the invention, comprising:
Micro lens arrays 1, including several micro lens are distributed in the first ball-type curved surface, for receiving external object light
Information；
Detector array 2, is located at the micro lens arrays rear, including several detectors, the detector with it is described micro-
Camera lens is arranged in a one-to-one correspondence, and is distributed in the second ball-type curved surface concentric with the first ball-type curved surface, for described in process
The target light information of micro lens is imaged, and the first image information is obtained；The micro lens arrays and the detector array
Constitute micro- camera array；
At least three polarizing films 3 are located in front of the micro lens arrays, are distributed at the micro lens arrays center,
Micro lens at each corresponding center of the polarizing film, for obtaining second image information in different polarization direction；
Wherein, there is micro- camera lens the visual field of estimated rate to be overlapped at two adjacent centers.
In this embodiment, the polarizing film in different polarization direction is placed in front of the micro lens at center；Detector array row
Be distributed in on another spherical surface of the arranged spherical concentric of micro lens arrays；The light of different visual fields is incident to micro lens from object space
Array is transmitted on detector array through micro lens arrays and is imaged；Each of micro lens arrays micro lens and detector array
Corresponding detector constitutes a sub- optical path in column, and wherein center sub-light routing polarizing film, micro lens and detector are constituted, light
A width subgraph is generated on the detector by each sub-light road, these subgraphs can be made to there is view using micro lens arrays arrangement
Field overlapping, to realize big field range high-resolution imaging.
Multiple aperture polarization imaging device of the invention, simultaneously to scene capture, is overlapped using visual field and is realized using multi-detector
Big view field imaging, and be overlapped using the visual field of center bore, the resolution ratio of small field of view imaging is improved, is searched carrying out wide area target
Accuracy with higher when rope then can accurately obtain target position information, strength information and target materials information.
In one embodiment, the detector is located at the focal plane of corresponding micro lens.Detector position is set
It can guarantee the focus consistency when being imaged in the focal plane of corresponding micro lens, it is ensured that higher image quality.
The detector array is classified as face battle array cmos detector.Cmos sensor has the control of automatic exposure amount, non-homogeneous benefit
It repays, white balance processing, black level control, the functions such as Gamma correction, the higher image of image quality can be collected, in addition, its
With stronger anti-interference capability of resistance to radiation, it can be good at the target acquisition field applied to this programme.
It in one embodiment, further include turntable 4, connecting micro- camera array for being rotated makes target position
The visual field overlapping region at microfacies machine array center.In carrying out target acquisition and tracing process, micro- camera array is needed
Detection target can be followed in real time and is moved, and micro- camera array is rotated by the way that turntable is arranged, it being capable of real-time perfoming target
Tracking improves tracking ability.
Preferably, the visual field Duplication of micro lens is 30%-80% at two adjacent centers.Duplication in principle
The higher the better, and it is bigger can to polarize reconstruction image region.But more high then higher to the equipment requirement and total detection viewing field of Duplication is smaller,
Therefore 40%-60% can generally be chosen.Certainly, remaining aperture micro lens also has certain overlapping, generally can be set to
10%-20%.
Assuming that shooting level field angle is M, vertical field of view angle is N, and central micromirror head visual field is a, edge micro lens visual field
For b, the visual field Duplication of micro lens is w% at two centers, and the two neighboring micro lens in remaining aperture has the visual field of f% to be overlapped,
Total camera number is n, and central camera number is m, then has:Its
Middle symbolExpression rounds up.
When a specific design is implemented, it is assumed that polarizing film there are four settings at micro lens arrays center, and four polarizations
The polarization direction of piece is different, and four polarizing films are placed in front of the micro lens of four, center, and detector array is arranged in and micro lens
On another spherical surface of the arranged spherical concentric of array.The micro lens arrays are designed, are made of n micro lens, four, center is micro-
The sub- visual field of camera lens is 6.45 °, 10.72 ° of the sub- visual field of remaining micro lens；Four, the center two neighboring micro lens in aperture has 40%
Visual field overlapping, the two neighboring micro lens in remaining aperture have 10% visual field overlapping, micro lens number is in addition to center boreWherein M is shooting level field angle, and N is vertical field of view
Angle, symbolExpression rounds up.
Embodiment two:
Present invention simultaneously provides a kind of multiple aperture polarized imaging systems, fill referring to Fig. 2, including imaging of the present invention
It sets, further includes:
Micro- camera control module 5 connects the detector array 2, for controlling each detector acquisition described the
One image information；
Target search module 6 connects micro- camera control module 5, for according to the first image acquisition of information mesh
Cursor position；
Polarization module 7 connects micro- camera control module 5, is used for according to the first image information to view
Target in the overlapping of field carries out Polarization and obtains the second image information, according to the second image information acquisition target materials
Information；
Polarization rebuilds module 8, connects the Polarization module 7, is used for according to second image information to visual field
Target in overlapping carries out polarization reconstruction, the image information after being rebuild.Image resolution ratio after reconstruction is got higher than before.
It in another embodiment, referring to Fig. 3, further include object judgement module 9, for judging the target materials information
When consistent with predetermined material information, the target position is sent to target tracking module 10；
The target tracking module 10, for being tracked to target.
In a specific embodiment, by taking four polarizing films as an example, target search module 6 passes through to detector array 2
Institute's detection image carries out target search to obtain target bearing；Polarization module 7 is overlapped the visual field in four, center aperture
The target in region carries out Polarization to obtain the material information of target, to identify decoy；Polarization rebuilds 8 centering of module
The target of the visual field overlapping region in four apertures of the heart carries out polarization and rebuilds to improve imaging resolution；10 pairs of height of target tracking module
Forthright and sincere target is differentiated to be tracked or implement to hit.
In a specific embodiment, micro- camera control module is used to control the exposure ginseng of each detector
Number.The exposure parameter includes the time of exposure and/or time for exposure.
Micro- camera control module 5, input terminal are connect with detector array 2, and output end and target search module 6 connect
It connects, for controlling the time of exposure, time for exposure of each detector in detector array, to take pictures to scene, and will visit
The result of taking pictures for surveying device is sent to image processing unit progress target and searches element, and obtains its azimuth information.
Turntable 4 rotates the device of the invention according to target bearing information, and target is made to be located at multiple aperture polarization imaging optical system
In the visual field overlapping region in 4, system center aperture.
The Polarization module 7 polarizes figure to the multiframe of the overlapping of presence acquired in the optical aperture of four, center
Picture, obtains the Stokes vector of scene, and then acquires polarization degree information and polarization angle information, by dividing target polarization characteristic
Analysis, differentiates true and false target.
Polarization rebuilds module 8, to the multiframe polarization image of the overlapping of presence acquired in the optical aperture of four, center, according to field
The difference of target and backscatter optical frequency spectrum information in scape establishes the degeneration mould of image under the complicated weather condition such as haze, sand and dust
Type designs polarization image algorithm for reconstructing, promotes image resolution ratio.
In another embodiment, the center bore micro lens from edge aperture micro lens of micro- camera array are using different
Lens are constituted, and referring to table 1- table 2, such as center bore micro lens is made of five lens, and focal length 50mm, structural parameters are such as
Table 1, the index path of the camera lens is as shown in figure 4, furthermore the present invention is also micro- to center bore one by Zemax optical design software
Camera lens carries out the modulation transfer function curve graph of emulation generation, as shown in Figure 5, it is known that Image Acquisition stability of the invention
It is higher.
| Radius of curvature | Thickness | Glass material | |
| Object plane | Infinity | Infinity | Air |
| First lens | 54.668 | 6.500 | ZF2 |
| -98.896 | 5.800 | Air | |
| Second lens | 20.067 | 5.500 | H-BAK8 |
| -36.095 | 5.300 | ZF7L | |
| 16.738 | 1.900 | Air | |
| Diaphragm face | Infinity | 2.131 | Air |
| The third lens | -12.114 | 5.000 | H-BAK8 |
| -6.868 | 1.300 | ZF6 | |
| -12.062 | 1.600 | Air | |
| 4th lens | -427.391 | 2.000 | ZF7L |
| -14.561 | 1.500 | Air | |
| 5th lens | -13.418 | 3.300 | ZF1 |
| -49.229 | 25.240 | Air |
Table 1
Edge aperture micro lens is made of five lens, focal length 30mm, structural parameters such as table 2, the optical path of the camera lens
Figure is as shown in fig. 6, furthermore the present invention also carries out emulation generation to one micro lens of edge hole diameter by Zemax optical design software
Modulation transfer function curve graph, referring to Fig. 7.
| Radius of curvature | Thickness | Glass material | |
| Object plane | Infinity | Infinity | Air |
| First lens | 48.914 | 6.500 | ZF2 |
| -96.827 | 5.800 | Air | |
| Second lens | 14.745 | 5.500 | H-BAK8 |
| -20.826 | 5.300 | ZF7L | |
| 13.814 | 1.900 | Air | |
| Diaphragm face | Infinity | 0.800 | Air |
| The third lens | -25.104 | 5.000 | H-BAK8 |
| -6.150 | 1.300 | ZF6 | |
| -11.411 | 1.600 | Air | |
| 4th lens | 18.632 | 2.000 | ZF7L |
| -16.572 | 1.500 | Air | |
| 5th lens | -11.276 | 3.300 | ZF1 |
| 15.889 | 6.304 | Air |
Table 2
Modulation transfer function curve, abscissa representation space frequency, ordinate indicate modulation transfer function
Size, curve therein are the mtf values of the meridian (T) and sagittal ray (S) under different field angles, and the MTF curve of Fig. 5 is in space
The MTF curve for reaching 0.4 or so, Fig. 7 at frequency 200lp/mm, which reaches 0.5 or so and approached at spatial frequency 200lp/mm, to spread out
Emitter-base bandgap grading limit illustrates that the present invention has preferable optical property.
Multiple aperture polarized imaging system of the invention, simultaneously to scene capture, is overlapped using visual field and is realized using multi-detector
Big view field imaging, and small field of view high-resolution imaging is realized using the overlapping of the visual field of center bore, with existing target-seeking device
It compares, has the advantages that integrate the search of target wide area accurately identifies with small field of view.Using before the optical aperture of four, center
The mode for adding polarizing film obtains the target image in four different polarization directions, by the reconstruction to four width polarization images, improves
The resolution ratio of multiple aperture polarized imaging system under original small field of view.The present invention is using to acquired in the optical aperture of four, center simultaneously
Polarization image carry out Polarization, differentiation of the multiple aperture polarized imaging system to true and false target may be implemented.
A specific embodiment of the invention is described in detail above in conjunction with attached drawing, but the present invention is not restricted to
Embodiment is stated, in the spirit and scope for not departing from claims hereof, those skilled in the art can make
Various modifications or remodeling out.
Claims (9)
1. a kind of multiple aperture polarization imaging device characterized by comprising
Micro lens arrays, including several micro lens are distributed in the first ball-type curved surface, for receiving external object light information；
Detector array is located at the micro lens arrays rear, including several detectors, the detector and the micro lens one
One is correspondingly arranged, and is distributed in the second ball-type curved surface concentric with the first ball-type curved surface, for by the micro lens
Target light information be imaged, obtain the first image information；The micro lens arrays constitute micro- with the detector array
Camera array；
At least three polarizing films are located in front of the micro lens arrays, are distributed at the micro lens arrays center, Mei Gesuo
Micro lens at the corresponding center of polarizing film is stated, for obtaining second image information in different polarization direction；
Wherein, there is micro- camera lens the visual field of estimated rate to be overlapped at two adjacent centers, it is assumed that shooting level view
Rink corner is M, and vertical field of view angle is N, and central micromirror head visual field is a, and edge micro lens visual field is b, micro lens at two centers
Visual field Duplication be w%, the two neighboring micro lens in remaining aperture have f% visual field be overlapped, total micro lens number n with it is micro- at center
Quantitative relation between camera lens number m are as follows:Wherein symbol
Expression rounds up.
2. multiple aperture polarization imaging device according to claim 1, which is characterized in that the detector is located at corresponding
Micro lens focal plane.
3. multiple aperture polarization imaging device according to claim 1, which is characterized in that the detector array is classified as face battle array
Cmos detector.
4. multiple aperture polarization imaging device according to claim 1, which is characterized in that further include turntable, connect described micro-
Camera array makes target be located at visual field overlapping region at microfacies machine array center for being rotated.
5. multiple aperture polarization imaging device according to claim 1, which is characterized in that micro- at two adjacent centers
The visual field Duplication of camera lens is 30%-80%.
6. a kind of multiple aperture polarized imaging system, which is characterized in that filled including imaging as described in any one in claim 1-5
It sets, further includes:
Micro- camera control module connects the detector array, for controlling the detector acquisition the first image information；
Target search module connects micro- camera control module, for according to the first image acquisition of information target position；
Polarization module connects micro- camera control module, for being overlapped according to the first image information to visual field
Interior target carries out Polarization and obtains the second image information, according to the second image information acquisition target materials information；
Polarization rebuilds module, connects the Polarization module, is used for according to second image information in visual field overlapping
Target carry out polarization reconstruction, obtain reconstruction image information.
7. multiple aperture polarized imaging system according to claim 6, which is characterized in that further include:
Object judgement module when for judging that the target materials information is consistent with predetermined material information, sends the target position
Set target tracking module；
The target tracking module, for being tracked to target.
8. multiple aperture polarized imaging system according to claim 6, which is characterized in that micro- camera control module is used for
Control the exposure parameter of the detector.
9. multiple aperture polarized imaging system according to claim 8, which is characterized in that when the exposure parameter includes exposure
Quarter and/or time for exposure.
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| CN110824454B (en) * | 2018-08-08 | 2023-11-03 | 宁波舜宇车载光学技术有限公司 | Lens system and construction method thereof |
| CN109164463B (en) * | 2018-09-25 | 2023-04-18 | 北京理工大学 | Multi-aperture view field partially-overlapped polarization thermal imaging method and device |
| CN110595625B (en) * | 2019-09-17 | 2021-02-02 | 北京理工大学 | Cross-shaped five-aperture view field partially-overlapped bionic thermal imaging system |
| CN111240033A (en) * | 2020-02-18 | 2020-06-05 | 中国人民解放军陆军工程大学 | Multi-aperture single-detector cross view field imaging system |
| CN111405269B (en) * | 2020-03-12 | 2021-09-28 | 深圳臻像科技有限公司 | Method for adjusting view field overlapping rate of multi-view camera acquisition system |
| CN112511762A (en) * | 2020-11-17 | 2021-03-16 | 西安工业大学 | Small target large visual field detection and identification device |
| CN115200711B (en) * | 2022-06-02 | 2023-07-11 | 哈尔滨理工大学 | Monte Carlo algorithm for vector beam transmission in complex environment and polarization imaging method |
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