CN202974441U - Miniature automatic optical filter rotating wheel multiband polarization imaging system - Google Patents
Miniature automatic optical filter rotating wheel multiband polarization imaging system Download PDFInfo
- Publication number
- CN202974441U CN202974441U CN 201220349311 CN201220349311U CN202974441U CN 202974441 U CN202974441 U CN 202974441U CN 201220349311 CN201220349311 CN 201220349311 CN 201220349311 U CN201220349311 U CN 201220349311U CN 202974441 U CN202974441 U CN 202974441U
- Authority
- CN
- China
- Prior art keywords
- optical filter
- double
- polarization
- image
- ccd cameras
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Studio Devices (AREA)
- Blocking Light For Cameras (AREA)
Abstract
The utility model relates to a miniature automatic optical filter rotating wheel multiband polarization imaging system, which is characterized by comprising a double-layer optical filter rotating wheel, three CCD cameras, a motor system, a laser range finder and a computer. The three CCD cameras are provided with front polarizing plates, the double-layer optical filter rotating wheel is provided between the polarizing plates and a scene being shot, the double-layer optical filter rotating wheel is controlled by the motor system, the three CCD cameras output shot images to the computer for processing, simultaneously, a measured distance signal is output to the computer by the laser range finder, according to the information of the laser range finder, after the polarization multiband is obtained by image geometrical correction and polarization image calculation, the computer sends a signal to the motor system to control the double-layer optical filter rotating wheel to rotate. The motor is controlled to rotate rapidly to obtain images, the system is also provided with image preprocessing, storage and communication functions, thereby stable and reliable work, manpower and cost saving effects are achieved.
Description
Technical field
The present invention relates to a kind of Multi-band Polarization imaging system, particularly a kind of novel optical, mechanical and electronic integration Multi-band Polarization imaging system, integrated circuit control unit hardware module for data acquisition and processing.
Background technology
In the prior art, imaging Intensity modulation at home and abroad existing prototype machine occurs, and also exists certain defective and deficiency on using.Aerospace as state-run in Japan laboratory adopts rotatory polarization electric tuning optical filter technology to obtain the polarization spectrum image, there are imaging system poor reliability, the low precision that gathers image and the problems such as real polarization information that can't obtain same fast-opening target, owing to can't at the polarized component image of same instantaneous acquisition the same band, therefore not obtaining the real polarization spectrum information of target.The AUS laboratory development based on LCVR and polarization electric tuning optical filter, although can improve the speed of polarized component conversion, still have the problems such as the real polarization information that can't obtain same fast-opening target and the polarization spectrum precision of images that obtains be poor.The imaging Intensity modulation based on the plane of polarization array CCD camera that is developing in the USAF laboratory although do not need the rotatory polarization sheet, because the manufacture difficulty of polarization area array CCD is larger, makes this imaging Intensity modulation still be difficult to realize.Though the polarization spectrum image has higher spectral resolution, but need take a large amount of computer resources, this is a kind of burden in actual applications, studies show that carry out on characteristic wave bands target detection, identification can reach higher precision, memory space is obviously little, and required computational resource is also much smaller.Anhui optical precision optical machinery research institute is in the design of polarization imaging device, incident light is divided into three parts with three minutes prisms, the area array CCD imaging of realization under the different polarization angle, this processing mode can make the energy that incides on CCD seldom, cause the CCD imaging affected by noise very large, signal to noise ratio (S/N ratio) is extremely low, is difficult to satisfy the graphical analysis requirement; Although the three-wire array CCD push-scanning type polarization imaging sniffer can well utilize whole energy of incident light, image taking speed is slower, and is the single band polarized imaging system, has the problems such as function singleness, range of application be narrower, is difficult to satisfy complicated multitask requirement.
Summary of the invention
The technical matters that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of small-sized automatic filter runner Multi-band Polarization imaging system, overcomes existing detection means and can only obtain the target surface radiation intensity and maybe can only obtain the defective of specific band polarization image.
Technical scheme
A kind of small-sized automatic filter runner Multi-band Polarization imaging system is characterized in that comprising double-deck optical filter runner, three CCD cameras, electric system, laser range finder and computing machines; The preposition polaroid that is provided with of three CCD cameras is provided with double-deck optical filter runner between polaroid and scene being shot, double-deck optical filter runner is controlled by electric system; Three CCD cameras export the image that absorbs to computing machine and process, laser range finder exports the distance signal that records to computing machine simultaneously, computing machine is according to the information of laser range finder, after the polarization multiband that the geometric correction of imagery and polarization image are calculated, then send a signal to the rotation that electric system is controlled double-deck optical filter runner; Described double-deck optical filter runner is provided with a plurality of circular holes, and a double-deck optical filter is set in each circular hole, and each double-deck optical filter only allows the light of the specific band in white light to pass through; The polarization angle of the preposition polaroid of described three CCD cameras is 0 °, 60 ° and 120 °; Shuttling movement between three CCD cameras, electric system and computing machines are processed closes and is: when the double-deck optical filter runner of electric system control turned for 1/6 week, trigger the CCD camera imaging, when double-deck optical filter runner completed for 1 week, computing machine carried out image rectification and calculates polarization parameter; Image rectification finishes storage to be completed, and the motor of computer control electric system again makes and turns double-deck optical filter runner and turned for 1/6 week, starts next cycle.
Described a plurality of double-deck optical filter is 5 optical filters and 1 neutral sheet, and centre wavelength and the bandwidth of 5 optical filters are respectively 400nm, 10nm; 450nm, 10nm; 550nm, 40nm; 650nm, 10nm; 700nm, 10nm.
Beneficial effect
A kind of small-sized automatic filter runner Multi-band Polarization imaging system that the present invention proposes adopts the CCD camera of three different polarization angles to carry out imaging to Same Scene, controls simultaneously motor automatic rotation optical filter runner and realizes multi-band Polarization Image.Can obtain multi-band image cube information corresponding to goal pels, comprise the important parameter such as pixel radiation intensity, degree of polarization, polarization azimuth of target different-waveband, greatly improve the detectivity of system.
The present invention compared with prior art has the following advantages: adopt mature optical filter runner, optical filter, polaroid and three CCD imaging detectors, can survey according to surveying the self-defined selection optical filter of purpose, three CCD cameras are worked simultaneously, have the advantages such as compact conformation, volume be little, quick; Obtain fast image by controlling electric machine rotation, and system also has image pre-service, storage and communication function, therefore can reach reliable and stable work, save the purpose of manpower and financial resources, its overall performance is as follows:
1) can be according to surveying the purpose requirement, self-defined selection can reach the imaging of 6 wave bands at most;
2) the runner rotation period is less than 150ms in 20ms the camera response time;
3) memory space: can reach 4G, when image reaches memory capacity, can enable communication module and surface work station and carry out view data and shift;
4) communication capacity: can carry out the image transmitting access by request access formula and surface work station;
5) ground resolution GSD (calculating by flying height 2000m): be better than 2m;
6) instantaneous field of view: IFOV=2m/2000m=1mrad;
7) Data Dynamic scope: 14bit/16bit;
8) polarization resolution: can obtain linear polarization component, linear polarization degree component, polarization phase angle component image in the Stokes parameter at each wave band.
Description of drawings
Fig. 1 is the concrete function that interior signal transfer direction of the small-sized automatic filter runner of the present invention Multi-band Polarization imaging system structural representation and a cycle and circuit control unit various piece realize;
Fig. 2 is the mechanical construction drawing of optical filter runner;
A: front elevation, b: side view;
Fig. 3 is light path travel path and the polarization multi-wavelength data cube schematic diagram of light in imaging device;
A: the light path travel path of light in imaging device, b: polarization multi-wavelength data cube;
Fig. 4 is that the information source of imaging system is to the data flow figure of main control computer;
When Fig. 5 was the platform motion, in the cycle, 0 ° of polarization direction CCD was not becoming the public domain of image in the same time.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
As shown in Figure 1, system comprises the parts such as optical filter runner, three CCD cameras, motor, laser range finder, circuit control unit.As shown in Figure 2, the optical filter runner is positioned at system foremost, only allows the light of the specific band in white light to pass through; And then be the polaroid before camera lens, the light transmission shaft of three polaroids and reference direction are fixed as respectively 0 °, 60 °, 120 °.Put respectively a CCD camera and carry out imaging after each polaroid, this programme is chosen 5 optical filters and 1 neutral sheet, and centre wavelength and the bandwidth of 5 optical filters are respectively 400nm, 10nm; 450nm, 10nm; 550nm, 40nm; 650nm, 10nm; 700nm, 10nm.Rotaring wheel structure as shown in the figure.Optical filter is arranged in each hole of runner.This routine CCD camera is that dimension is looked MV-1300, and the drive motor of runner is the leadshine-1.8/4.0A stepper motor.Laser range finder is east gold torch BF1000 model.
The imaging process of CCD is controlled by circuit control unit.Circuit control unit comprises electric system and computing machine, it is the core component of native system, 1) at first carry out the motor initialization by the control of the motor control module in circuit control unit, coaxial drive between motor and optical filter runner, accurately control electric machine rotation and make the optical filter runner to the tram, even also the hole of optical filter runner between two-layer overlaps fully; 2) then transmission feeds back signal to the CCD camera control module, controls simultaneously three CCD cameras, and imaging is carried out in automatic exposure, carries out the preservation of image after imaging is complete, and this function is completed by the image memory module in circuit control unit; 3) complete after this module send and feed back signal to motor control module, control driven by motor optical filter runner and rotated for 1/6 week; 4) rotate complete after, repeat 2,3 until one-period; 5) all after dates, the feedback signal of image memory module triggers the image calculation module, and the information needed that provides according to laser range finder etc., to comprise image and the unit module that the geometric correction of imagery and polarization image calculate and calculate after the polarization multi-band image storage that obtains, send a signal to motor control module after complete, carry out next cycle, repeat 1,2,3,4,5.Ground sends the request of access signal by the communication module in circuit control unit, can transmit back the polarization multi-band image that computing unit calculates.The photo of control module as:
Due to location difference between three CCD cameras and fixing, also there are some pixel skews in imaging, also namely impact point corresponding to same image coordinate in the image of three CCD cameras there are differences, need the pixel of the same coordinate of the image under the different polarization angle is added Stokes parameter and the polarization parameter that reducing obtains impact point and obtain Stokes and polarization parameter image, thereby need this species diversity is proofreaied and correct.At first we consider platform, the situation that runner is static, suppose that three image centers are respectively A, B, and C is respectively A in the homogeneous coordinates of world coordinate system
w(x
aw, y
aw, z
aw, 1)
T, B
w(x
bw, y
bw, z
bw, 1)
T, C
w(x
cw, y
cw, z
cw, 1)
T, the camera matrix of three CCD is P=K (R, t).A, B, the camera coordinate system between C can make A according to its Relative position determination, B, C is respectively A in the homogeneous coordinates of camera coordinate system
c(x
ac, y
ac, z
ac, 1)
T, B
c(x
ac+ a
1, y
ac+ b
1, z
ac+ c
1, 1)
T, C
c(x
ac+ a
2, y
ac+ b
2, z
ac+ c
2, 1)
T, a wherein
1, b
1, c
1, a
2, b
2, c
2Can accurately measure according to the relative position of three CCD cameras.
The homogeneous coordinates of some X (x, y, z, 1) in three camera images in world coordinate system are:
m
A＝P
1X＝K(R
1,t)X＝KR
1(I,-A)X
m
B＝P
2X＝K(R
2,t)X＝KR
2(I,-B)X
m
C＝P
3X＝K(R
3,t)X＝KR
3(I,-C)X
m
A, m
B, m
CIn the homogeneous coordinates of three CCD as the plane, elimination pixel that can be very easy when obtaining Stokes parameter and polarization parameter according to this geometrical correspondence is offset for same impact point.
When platform motion and optical filter runner also rotated, at first we found out 1 group of 18 width doubling of the image public domain of acquisition.In one week of optical filter runner work, the relation between three CCD imagings and polarization angle, wave band is as shown in table 1: can draw from table, optical filter rotates a week, can obtain respectively 18 width images, the image under 3 different polarization angles of corresponding 6 wave bands.The public part of the 6 width images of all after date correspondences 0 ° of polarization directions finding out is rotated in braces in accompanying drawing 4 zone for optical filter; Secondly the public part of image of each polarization direction being found out is proofreaied and correct according to top method.
Table 1 runner rotates the different polarization angle multi-band image that a week obtains
Thereby for one-period, be also that the optical filter runner rotates a circle, when considering platform mobile, at first we need to seek in the cycle common region in a CCD camera; Due to the position difference that exists between three CCD cameras, still there be the non-in full accord of scene between 3 CCD cameras common region separately that the searching that causes goes out, this moment, we proofreaied and correct according to the relative physics position difference between three CCD cameras.
Claims (2)
1. a small-sized automatic filter runner Multi-band Polarization imaging system, is characterized in that comprising double-deck optical filter runner, three CCD cameras, electric system, laser range finder and computing machines; The preposition polaroid that is provided with of three CCD cameras is provided with double-deck optical filter runner between polaroid and scene being shot, double-deck optical filter runner is controlled by electric system; Three CCD cameras export the image that absorbs to computing machine and process, laser range finder exports the distance signal that records to computing machine simultaneously, computing machine is according to the information of laser range finder, after the polarization multiband that the geometric correction of imagery and polarization image are calculated, then send a signal to the rotation that electric system is controlled double-deck optical filter runner; Described double-deck optical filter runner is provided with a plurality of circular holes, and a double-deck optical filter is set in each circular hole, and each double-deck optical filter only allows the light of the specific band in white light to pass through; The polarization angle of the preposition polaroid of described three CCD cameras is 0 °, 60 ° and 120 °; Shuttling movement between three CCD cameras, electric system and computing machines are processed closes and is: when the double-deck optical filter runner of electric system control turned for 1/6 week, trigger the CCD camera imaging, when double-deck optical filter runner completed for 1 week, computing machine carried out image rectification and calculates polarization parameter; Image rectification finishes storage to be completed, and the motor of computer control electric system again makes and turns double-deck optical filter runner and turned for 1/6 week, starts next cycle.
2. small-sized automatic filter runner Multi-band Polarization imaging system according to claim 1, it is characterized in that: described a plurality of double-deck optical filters are 5 optical filters and 1 neutral sheet, and centre wavelength and the bandwidth of 5 optical filters are respectively 400nm, 10nm; 450nm, 10nm; 550nm, 40nm; 650nm, 10nm; 700nm, 10nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220349311 CN202974441U (en) | 2012-07-18 | 2012-07-18 | Miniature automatic optical filter rotating wheel multiband polarization imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220349311 CN202974441U (en) | 2012-07-18 | 2012-07-18 | Miniature automatic optical filter rotating wheel multiband polarization imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202974441U true CN202974441U (en) | 2013-06-05 |
Family
ID=48515500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220349311 Withdrawn - After Issue CN202974441U (en) | 2012-07-18 | 2012-07-18 | Miniature automatic optical filter rotating wheel multiband polarization imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202974441U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809431A (en) * | 2012-07-18 | 2012-12-05 | 西北工业大学 | Small multiband polarization imaging system with automatic filter wheel |
| CN104535187A (en) * | 2014-12-26 | 2015-04-22 | 中国人民解放军理工大学 | Automatic device for compact multi-band and full-polarization imaging |
| CN105092028A (en) * | 2014-05-06 | 2015-11-25 | 杭州远方光电信息股份有限公司 | Image spectrum measuring device |
| CN107588931A (en) * | 2017-08-29 | 2018-01-16 | 上海复光竞成科技有限公司 | More scene glare tester methods |
| CN107843343A (en) * | 2017-11-23 | 2018-03-27 | 长光卫星技术有限公司 | Polarization multi-spectrum aerial surveying camera based on monolithic face battle array cmos detector |
-
2012
- 2012-07-18 CN CN 201220349311 patent/CN202974441U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809431A (en) * | 2012-07-18 | 2012-12-05 | 西北工业大学 | Small multiband polarization imaging system with automatic filter wheel |
| CN105092028A (en) * | 2014-05-06 | 2015-11-25 | 杭州远方光电信息股份有限公司 | Image spectrum measuring device |
| CN104535187A (en) * | 2014-12-26 | 2015-04-22 | 中国人民解放军理工大学 | Automatic device for compact multi-band and full-polarization imaging |
| CN104535187B (en) * | 2014-12-26 | 2016-05-04 | 中国人民解放军理工大学 | A kind of automation equipment of compact multiband full polarization imaging |
| CN107588931A (en) * | 2017-08-29 | 2018-01-16 | 上海复光竞成科技有限公司 | More scene glare tester methods |
| CN107843343A (en) * | 2017-11-23 | 2018-03-27 | 长光卫星技术有限公司 | Polarization multi-spectrum aerial surveying camera based on monolithic face battle array cmos detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202974441U (en) | Miniature automatic optical filter rotating wheel multiband polarization imaging system | |
| CN103471715B (en) | A kind of light path combined type light field spectrum imaging method and device altogether | |
| CN104154997B (en) | A kind of UAV system small-sized self-stabilization aviation multi-optical spectrum imaging system | |
| CN104266605B (en) | Imaging method for three-dimensional laser scanning imager | |
| CN103472592B (en) | A kind of fast high-throughout polarization imaging method of illuminated and polarization imager | |
| RU2734018C2 (en) | Method and device for generating data representing a light field | |
| CN102722183B (en) | Image tracking system and image tracking algorithm for double-cylinder multi-FOV (field of view) sun photometer | |
| CN102707452B (en) | Double separation wollaston prism high-resolution simultaneous polarization-imaging system | |
| BR102015001708A2 (en) | method for determining a polarization of a scene, and system for acquiring images of a scene | |
| CN102809431B (en) | Small multiband polarization imaging system with automatic filter wheel | |
| CN102692214A (en) | Narrow space binocular vision measuring and positioning device and method | |
| CN103439001B (en) | A kind of measurement and assessment method of non-homogeneous vector polarized light and device | |
| US20210329217A1 (en) | Method and an apparatus for generating data representative of a pixel beam | |
| CN104535187A (en) | Automatic device for compact multi-band and full-polarization imaging | |
| CN204373782U (en) | A kind of automation equipment of compact multiband full polarization imaging | |
| EP3398161B1 (en) | A method and an apparatus for generating data representative of a pixel beam | |
| CN102507006B (en) | Acousto-optic tunable filter-based infrared differential hyperspectral imaging device | |
| CN102053475A (en) | Single camera based omnibearing stereo vision system | |
| CN107830928B (en) | A kind of heliograph for cirrus optical characteristic measurement | |
| CN103226005B (en) | System and method for measuring weight of stacked objects by mesh-surface structure light | |
| CN202614380U (en) | Static spectrum polarization imager | |
| CN106840197A (en) | Intersect scaling system in high precision on a kind of star | |
| CN109186770A (en) | A kind of multi-functional hemisphere sky polarized imaging system | |
| CN103134664B (en) | A kind of camera of optical satellite in-orbit MTF measuring method based on convex reflecting mirror | |
| US10909704B2 (en) | Apparatus and a method for generating data representing a pixel beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20140820 |
|
| RGAV | Abandon patent right to avoid regrant |