CN107589551A - 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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- CN107589551A CN107589551A CN201710605374.XA CN201710605374A CN107589551A CN 107589551 A CN107589551 A CN 107589551A CN 201710605374 A CN201710605374 A CN 201710605374A CN 107589551 A CN107589551 A CN 107589551A
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Abstract
The invention discloses a kind of multiple aperture polarization imaging device, including：Micro lens arrays, including some micro lens, it is distributed in the first ball-type curved surface, for receiving external object light information；Detector array, positioned at the micro lens arrays rear, including some detectors, the detector is corresponded with the micro lens and set, it is distributed in the second ball-type curved surface concentric with the first ball-type curved surface, for to being imaged by the target light information of the micro lens, obtaining the first image information；At least three polarizers, in front of the micro lens arrays, it is distributed at the micro lens arrays center, micro lens at each corresponding center of the polarizer, for obtaining second image information in different polarization direction；Wherein, micro lens has the visual field of estimated rate overlapping at two adjacent centers.The device of the present invention can accurately obtain target position information, strength information and target materials information.
Description
Technical field
The present invention relates to photodetection field, more particularly to a kind of multiple aperture polarization imaging device and system.
Background technology
Polarization imaging detection mode main at present 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 polarizer is fixed on imaging system by this method, manually/electricity
Dynamic rotatory polarization piece is to different linear polarizations to obtain the image of different polarization states, and this method is simple and easy, real-time
It is poor, can not be to the scene of change 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 with more polarizers, 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 is added, and the light energy that single channel detects significantly declines, detection difficulty increase.
Patent CN101806959 discloses a kind of real-time small polarization imaging device, and the device is by being placed on lens array
4 polarizers and a large area array detector after row obtain 4 width polarization figure simultaneously, because 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 same large area array detector, also likely sends out
The overlapping situation of raw image planes.
Patent CN102944937 discloses one kind point aperture polarized imaging system, and patent utilization polarization chip arrays obtain
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 uses same light path, and segmentation aperture Hou Ge apertures luminous energy is restricted, while the common information of each subgraph is less,
It is difficult to polarization manipulation.
In summary, prior art image quality is low, polarization manipulation is complicated, causes accurately obtain target location letter
Breath, strength information and target materials information.
The content of the invention
The invention reside in the above-mentioned deficiency for overcoming prior art, there is provided one kind can accurately obtain target position information, strong
Spend the multiple aperture polarization imaging device and system of information and target materials information.
In order to realize foregoing invention purpose, the technical solution adopted by the present invention is：
A kind of multiple aperture polarization imaging device, including：
Micro lens arrays, including some micro lens, it is distributed in the first ball-type curved surface, for receiving external object light letter
Breath；
Detector array, positioned at the micro lens arrays rear, including some detectors, the detector and the micro mirror
Head, which corresponds, to be set, and it 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 obtains the first image information；The micro lens arrays and the detector array structure
Into micro- camera array；
At least three polarizers, in front of the micro lens arrays, it is distributed at the micro lens arrays center, often
Micro lens at the individual corresponding center of the polarizer, for obtaining second image information in different polarization direction；
Wherein, micro- camera lens have the visual field of estimated rate overlapping 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, in addition to turntable, micro- camera array is connected, for being rotated, makes target positioned at 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 system, including imaging device of the present invention, in addition to：
Micro- camera control module, the detector array is connected, for controlling each detector collection described first
Image information；
Target search module, micro- camera control module is connected, for according to described first image acquisition of information target
Position；
Polarization module, connect micro- camera control module, for according to described 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 rebuild module, connect the Polarization module, for according to second image information to visual field weight
Target in folding carries out polarization reconstruction, obtains reconstruction image information.
Further, in addition to：
Object judgement module, during for judging that the target materials information is consistent with predetermined material information, send the mesh
Cursor position is to target tracking module；
The target tracking module, for being tracked to target.
Further, micro- camera control module is used for the exposure parameter for controlling 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：
The multiple aperture polarization imaging device of the present invention corresponds to multi-detector using multiple optical apertures, during to scene capture,
Single aperture light energy is larger, realizes that big view field imaging and center bore visual field is overlapping using visual field is overlapping, realizes small field of view
High-resolution imaging, when carrying out wide area target search with higher accuracy, it then can accurately obtain target location letter
Breath, strength information and target materials information.
Brief description of the drawings
Fig. 1 show the multiple aperture polarization imaging device theory diagram of the present invention.
Fig. 2 show the multiple aperture polarized imaging system module frame chart of the present 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 is shown carries out emulation life with Zemax optical design softwares to a micro lens of center bore in the present invention
Into modulation transfer function curve map.
Fig. 6 show the index path of a micro lens in edge aperture of the present invention.
Fig. 7 is shown carries out emulation generation with Zemax optical design softwares to one, edge aperture in present invention micro lens
Modulation transfer function curve map.
Embodiment
With reference to embodiment, the present invention is described in further detail.But this should not be interpreted as to the present invention
The scope of above-mentioned theme is only limitted to following embodiment, all models that the present invention is belonged to based on the technology that present invention is realized
Enclose.
Embodiment one：
Fig. 1 show the multiple aperture polarization imaging device theory diagram of the present invention, including：
Micro lens arrays 1, including some micro lens, it is distributed in the first ball-type curved surface, for receiving external object light
Information；
Detector array 2, positioned at the micro lens arrays rear, including some detectors, the detector with it is described micro-
Camera lens, which corresponds, to be set, and it 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 obtains the first image information；The micro lens arrays and the detector array
Form micro- camera array；
At least three polarizers 3, in front of the micro lens arrays, it is distributed at the micro lens arrays center,
Micro lens at each corresponding center of the polarizer, for obtaining second image information in different polarization direction；
Wherein, micro- camera lens have the visual field of estimated rate overlapping at two adjacent centers.
In this embodiment, the polarizer in different polarization direction is placed in before the micro lens at center；Detector array is arranged
It is distributed on another sphere for spherical concentric of being arranged with micro lens arrays；The light of different visual fields is incident to micro lens from object space
Array, it is transmitted on detector array and is imaged through micro lens arrays；Each micro lens and detector array in micro lens arrays
Corresponding detector forms a sub- light path in row, and wherein center sub-light route polarizer, micro lens and detector is formed, light
One width subgraph is generated by each sub-light road on the detector, can exist these subgraphs using micro lens arrays arrangement and regard
Field is overlapping, so as to realize big field range high-resolution imaging.
The multiple aperture polarization imaging device of the present invention, simultaneously to scene capture, utilizes the overlapping realization of visual field using multi-detector
Big view field imaging, and it is overlapping 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
With higher accuracy during rope, target position information, strength information and target materials information then can be accurately obtained.
In one embodiment, the detector is located at the focal plane of corresponding micro lens.Detector position is set
The focus uniformity when focal plane of corresponding micro lens can ensure be imaged, 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
Repay, white balance processing, black level control, the function 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.
In one embodiment, in addition to turntable 4, micro- camera array is connected, for being rotated, makes target position
The visual field overlapping region at the microfacies machine array center., it is necessary to micro- camera array in target acquisition and tracing process is carried out
Detection target can be followed in real time and is moved, and micro- camera array is rotated by setting turntable, can carry out target in real time
Tracking, improve ability of tracking.
Preferably, the visual field Duplication of micro lens is 30%-80% at two adjacent centers.Duplication in principle
It is the higher the better, it is bigger that reconstruction image region can be polarized.But more high then higher to the equipment requirement and total detection viewing field of Duplication is smaller,
Therefore 40%-60% can typically be chosen.Certainly, remaining aperture micro lens also has certain overlapping, typically could be arranged to
10%-20%.
Assuming that the shooting level angle of visual field 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 that f% visual field is overlapping,
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 four polarizers, and four polarizations are provided with micro lens arrays center
The polarization direction of piece is different, and four polarizers are placed in before the micro lens of four, center, and detector array is arranged in and micro lens
Array arrange spherical concentric another sphere on.The micro lens arrays are designed, are made up 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 it is overlapping, the two neighboring micro lens in remaining aperture has 10% visual field overlapping, and micro lens number is in addition to center boreWherein M is the shooting level angle of visual field, and N is vertical field of view
Angle, symbolExpression rounds up.
Embodiment two：
Present invention simultaneously provides a kind of multiple aperture polarized imaging system, referring to Fig. 2, including imaging dress of the present invention
Put, in addition to：
Micro- camera control module 5, the detector array 2 is connected, for controlling each detector collection described the
One image information；
Target search module 6, micro- camera control module 5 is connected, for according to described first image acquisition of information mesh
Cursor position；
Polarization module 7, connect micro- camera control module 5, for according to described first image information to regarding
Target in field is overlapping carries out Polarization and obtains the second image information, according to the second image information acquisition target materials
Information；
Polarization rebuild module 8, connect the Polarization module 7, 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 uprises than before.
In another embodiment, referring to Fig. 3, in addition to object judgement module 9, for judging the target materials information
When consistent with predetermined material information, the target location is sent to target tracking module 10；
The target tracking module 10, for being tracked to target.
In a detailed embodiment, by taking four polarizers 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 overlapping to the visual field in four apertures in center
The target in region carries out Polarization to obtain the material information of target, so as to identify decoy；Polarization rebuilds the centering of module 8
The target of the visual field overlapping region in four apertures of the heart carries out polarization and rebuild to improve imaging resolution；Target tracking module 10 is to height
Differentiate forthright and sincere target and be tracked or implement strike.
In a detailed embodiment, micro- camera control module is used to control the exposure of each detector to join
Number.The exposure parameter includes the time of exposure and/or time for exposure.
Micro- camera control module 5, its input are connected with detector array 2, and its output end connects with target search module 6
Connect, for controlling the time of exposure of each detector, time for exposure in detector array, to be taken pictures to scene, and will visit
The result of taking pictures of survey device is sent to graphics processing unit progress target and searches element, and obtains its azimuth information.
Turntable 4 rotates the device of the present invention according to target bearing information, target is located at multiple aperture polarization imaging optical system
In the visual field overlapping region in 4, system center aperture.
The Polarization module 7, its multiframe polarization figure overlapping to the presence acquired in the optical aperture of four, center
Picture, obtains the Stokes vectors of scene, and then tries to achieve polarization degree information and polarization angle information, by dividing target polarization characteristic
Analysis, differentiates true and false target.
Polarization rebuilds module 8, the multiframe polarization image overlapping to the presence acquired in the optical aperture of four, center, according to field
Target and the difference of backscatter optical frequency spectrum information in scape, establish the degeneration mould of the complicated weather condition hypograph such as haze, sand and dust
Type, polarization image algorithm for reconstructing is designed, lift image resolution ratio.
In another embodiment, the center bore micro lens of micro- camera array uses different from edge aperture micro lens
Lens are formed, and referring to table 1- tables 2, such as center bore micro lens is made up of five lens, and focal length 50mm, its structural parameters is such as
Table 1, the index path of the camera lens is as shown in figure 4, the present invention is also micro- to center bore one by Zemax optical design softwares in addition
Camera lens emulate the modulation transfer function curve map of generation, as shown in Figure 5, it is known that IMAQ 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 |
| 3rd 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 up of five lens, focal length 30mm, its structural parameters such as table 2, the light path of the camera lens
Figure is as shown in fig. 6, the present invention also carries out emulation generation by Zemax optical design softwares to one, edge hole footpath micro lens in addition
Modulation transfer function curve map, 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 |
| 3rd 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, its abscissa representation space frequency, ordinate represent modulation transfer function
Size, curve therein are the mtf values of the meridian (T) and sagittal ray (S) under the different angles of visual field, and Fig. 5 MTF curve is in space
The MTF curve for reaching 0.4 or so, Fig. 7 at frequency 200lp/mm reaches 0.5 or so and close to spreading out at spatial frequency 200lp/mm
Emitter-base bandgap grading limits, and illustrates that the present invention has preferable optical property.
The multiple aperture polarized imaging system of the present invention, simultaneously to scene capture, utilizes the overlapping realization of visual field using multi-detector
Big view field imaging, and using center bore visual field it is overlapping realize small field of view high-resolution imaging, with existing target-seeking device
Compare, have and integrate the advantages of search of target wide area accurately identifies with small field of view.Using before the optical aperture of four, center
Add the mode of polarizer, obtain the target image in four different polarization directions, by the reconstruction to four width polarization images, improve
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, it is possible to achieve differentiation of the multiple aperture polarized imaging system to true and false target.
The embodiment of the present invention is described in detail above in conjunction with accompanying drawing, but the present invention is not restricted to
Embodiment is stated, in the case of the spirit and scope of claims hereof are not departed from, those skilled in the art can make
Go out various modifications or remodeling.
Claims (9)
- A kind of 1. multiple aperture polarization imaging device, it is characterised in that including：Micro lens arrays, including some micro lens, it is distributed in the first ball-type curved surface, for receiving external object light information；Detector array, positioned at the micro lens arrays rear, including some detectors, the detector and the micro lens one One is correspondingly arranged, and it is distributed in the second ball-type curved surface concentric with the first ball-type curved surface, for passing through the micro lens Target light information be imaged, obtain the first image information；The micro lens arrays form micro- with the detector array Camera array；At least three polarizers, in front of the micro lens arrays, it is distributed at the micro lens arrays center, Mei Gesuo Micro lens at the corresponding center of polarizer is stated, for obtaining second image information in different polarization direction；Wherein, micro- camera lens have the visual field of estimated rate overlapping at two adjacent centers.
- 2. multiple aperture polarization imaging device according to claim 1, it is characterised in that the detector is positioned at corresponding Micro lens focal plane.
- 3. multiple aperture polarization imaging device according to claim 1, it is characterised in that the detector array is classified as face battle array Cmos detector.
- 4. multiple aperture polarization imaging device according to claim 1, it is characterised in that also described micro- including turntable, connection Camera array, for being rotated, target is set to be located at visual field overlapping region at the microfacies machine array center.
- 5. multiple aperture polarization imaging device according to claim 1, it is characterised 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, it is characterised in that including the imaging dress as described in claim any one of 1-5 Put, in addition to：Micro- camera control module, the detector array is connected, for controlling the detector collection described first image information；Target search module, micro- camera control module is connected, for according to described first image acquisition of information target location；Polarization module, micro- camera control module is connected, for overlapping to visual field according to described first image information Interior target carries out Polarization and obtains the second image information, according to the second image information acquisition target materials information；Polarization rebuild module, connect the Polarization module, for according to second image information it is overlapping to visual field in Target carry out polarization reconstruction, obtain reconstruction image information.
- 7. multiple aperture polarized imaging system according to claim 6, it is characterised in that also include：Object judgement module, during for judging that the target materials information is consistent with predetermined material information, send the target position Put target tracking module；The target tracking module, for being tracked to target.
- 8. multiple aperture polarized imaging system according to claim 6, it is characterised 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, it is characterised in that when the exposure parameter includes exposure Quarter and/or time for exposure.
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| CN115200711A (en) * | 2022-06-02 | 2022-10-18 | 哈尔滨理工大学 | Monte Carlo algorithm and polarization imaging method for vector beam transmission in complex environment |
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