CN102707452B - Double separation wollaston prism high-resolution simultaneous polarization-imaging system - Google Patents
Double separation wollaston prism high-resolution simultaneous polarization-imaging system Download PDFInfo
- Publication number
- CN102707452B CN102707452B CN201210227934.XA CN201210227934A CN102707452B CN 102707452 B CN102707452 B CN 102707452B CN 201210227934 A CN201210227934 A CN 201210227934A CN 102707452 B CN102707452 B CN 102707452B
- Authority
- CN
- China
- Prior art keywords
- wollaston prism
- prism
- wollaston
- polarization
- wave plate
- 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.)
- Active
Links
Abstract
The invention relates to a double separation wollaston prism high-resolution simultaneous polarization-imaging system, comprising a pre-position telescopic system, an amplitude-splitting module, an aperture separating module and two large-planar-array CCDs (Charge Coupled Devices), wherein a target object radiates through the pre-position telescopic system to obtain a compression collimated light beam, and the compression collimated light beam is irradiated into the amplitude-splitting module and is divided into two vertically emitted paths, wherein one path passes through the aperture separating module consisting of a half-wave plate with an azimuth angle of 0 DEG and the wollaston prism and then is divided into two paths with different polarization states, the two paths are emitted in the form of an included angle, two parts of target object images are displayed on one of the two large-planar-array CCDs; the other path passes through the aperture separating module consisting of the half-wave plate and the wollaston prism to be divided into two paths of a polarization state, the two paths are emitted in the form of an included angle, two different parts of target object images are displayed on the other large-planar-array CCD, and finally the synchronous imaging of four polarization states is realized on the two large-planar-array CCDs through one exposure. The invention solves the limitation in application that the energy utilization ratio of amplitude-splitting synchronous polarization imaging is low, four sets of optical systems respond inconsistently and the like.
Description
Technical field
The present invention relates to photoelectronic imaging field, especially a kind of two separated wollaston prism high resolution are polarized imaging system simultaneously.
Background technology
Stokes vector can be described light wave intensity and polarization state completely, in order to obtain four Stokes parameters of target light radiation, at least needs to obtain four width different polarization states images of same target.According to this principle, both at home and abroad development and design a lot of polarized imaging systems.
In technology, main polarization imaging mode has two kinds now---and timesharing polarization imaging and simultaneously polarization imaging, there is certain limiting factor in these two kinds of methods, has restricted the application of polarization imaging technology.The mode that timesharing measuring method adopts rotating optical element or postpones variable fixedly wave plate gathers four width images of different polarization states successively according to sequential, for calculating the polarization characteristic of detected target.According to Stokes theory, the measurement of four Stokes parameters of target light radiation must be to identical target, in identical illumination and identical parameter detector, the polarization characteristic that gathers the true reflection of ability detected target under condition is set, this requirement has determined that the hungry correctness of timesharing measuring method depends in the gatherer process of four width different polarization states images, detected target is relative with polarized imaging system static, surround lighting radiation is constant, camera parameter setting is constant, while therefore using timesharing polarization imaging method to carry out polarization imaging detection to motion/variation targets, may be because false polarization information is introduced in the motion/variation of target.So timesharing polarization imaging method is used for the polarization imaging of the static atural objects such as surface vegetation, buildings, mining deposits, survey, the polarization imaging that is not suitable for dynamic object is surveyed.
Polarization imaging method obtains four width different polarization states images of target by single exposure simultaneously, movement-less part, and system reliability and good stability, solved the problem that in timesharing polarization imaging, repeatedly timesharing measurement exists.Polarization imaging mainly contains a minute amplitude, minute three kinds of He Fen focal planes, aperture polarization imaging mode simultaneously.Minute amplitude simultaneously polarization imaging adopts four CCD, quadruplet optical system, and capacity usage ratio is low, and the response heterogeneity of four CCD be, the inconsistency of quadruplet Performance of Optical System all can be introduced polarimetry deviation, and system bulk weight is large.The example of minute aperture polarization imaging adopts gummed folding wedge angle wollaston prism to realize a minute aperture, gathers four width polarization images on a CCD simultaneously, but domesticly can not produce the gummed folding wedge angle wollaston prism meeting the demands.Minute focal plane is polarization imaging simultaneously, by integrated micro-polaroid on focus planardetector or microwave chip arrays, realizes polarization imaging simultaneously, and domestic still do not possess this manufacturing process.
Summary of the invention
The object of the invention is to propose a kind of two separated wollaston prism high resolution polarized imaging system simultaneously, solve the application restric-tions such as minute amplitude while polarization imaging capacity usage ratio is low, quadruplet optical system non_uniform response, overcome the requirement of polarization imaging to manufacturing technology level simultaneously of minute He Fen focal plane, aperture.
In order to achieve the above object, technical scheme of the present invention is:
Two separated wollaston prism high resolution are polarized imaging system simultaneously, comprise preposition telescopic system, divide amplitude module, divide aperture module and 2 large area array CCDs, within described minute, aperture module comprises two half-wave plates and two cube wollaston prisms, described preposition telescopic system front end is set as optical radiation incident end, rear end is optical radiation exit end, object radiation obtains compressing collimated light beam by preposition telescopic system, incide the two-way that is divided into vertical outgoing after minute amplitude module, wherein the one group half-wave plate of a road in the module of undue aperture is divided into the two-way that polarization state is different after wollaston prism, two-way is with the outgoing of angle form, and on one of them the large area array CCD in described 2 large area array CCDs, demonstrate the object image at two positions, another road another group half-wave plate in the module of undue aperture is also divided into into the two-way that polarization state is different after wollaston prism, two-way is with the outgoing of angle form, and on another large area array CCD, demonstrate the object image of two different parts, final disposable exposure realizes the imaging simultaneously of four polarization states on two large area array CCDs.
Described preposition telescopic system front end is set as optical radiation incident end, rear end is optical radiation exit end, monochromatic filter is placed on the rear end face position near described preposition telescopic system, described preposition telescopic system is inner near placing respectively lens combination in front and rear end, lens combination near rear end face is relative with described monochromatic filter, between former and later two lens combination, the back focal plane place of front lens group places adjustable field stop, former and later two lens combination and field stop form collimated light path.
Within described minute, amplitude module comprises a depolarization Amici prism, and the right angle end face of depolarization Amici prism is beam incident surface, and the inclined-plane of depolarization Amici prism is light splitting surface, and two other right angle end face of depolarization Amici prism is light beam exit facet.
The right angle end face of described wollaston prism is relative with two right angle light beam exit facets of depolarization Amici prism respectively, for light entrance face, between the right angle light beam exit facet of one of them wollaston prism and described depolarization Amici prism, place position angle and be the half-wave plate of 22.5 °, light path for balance two-way, between the right angle light beam exit facet of another wollaston prism and described depolarization Amici prism, place position angle and be the half-wave plate of 0 °, described two phase retardations differ half-wave plate and two wollaston prisms formation minute aperture modules of 22.5 °, the optical radiation of target is through collimated light path collimation in preposition telescopic system, monochromatic filter incides described depolarization Amici prism after filtering, part light is from the inclined-plane of described depolarization Amici prism, after right angle face transmission, incide position angle and be half-wave plate and the wollaston prism of 0 °, another part light by after the inclined-plane of described depolarization Amici prism reflection from right angle face transmission, incide position angle and be half-wave plate and the wollaston prism of 22.5 °, light beam outgoing after the birefringence effect of wollaston prism.
Described two large area array CCD detectors are accepted respectively the different polarization states light beam from two wollaston prism outgoing, described two CCD are large area array CCD, have offset the resolving power loss that minute aperture module is brought.
Described preposition telescopic system is near the lens combination of front end face, and its relative aperture F and focal distance f are along with image-forming range is not all adjustable.
Between the image planes of described ccd detector and described wollaston prism, place respectively imaging len.
Beneficial effect of the present invention: (1) movement-less part of the present invention, compact conformation, system stability is good, reliability is high, and polarization imaging is little simultaneously compared with dividing amplitude for volume weight.(2) single exposure of the present invention obtains four width different polarization states images, speed of detection is fast, can be for the polarization imaging of rapid movement/variation targets, as the polarization imaging of the water surface ripple gradient detects, water surface ripple is irregular variation in time, therefore need to measure four different polarization states of water surface ripple simultaneously, use two separated wollaston prisms while polarization imagings to realize.(3) the present invention is not subject to the impact of detector and target relative motion, therefore can be used for the polarization imaging observation of moving target.(4) detection mode of the present invention determines four different polarization states imagings simultaneously, so environmental radiation energy variation can polarisation-affecting measurement result.
Accompanying drawing explanation
Fig. 1 is light channel structure figure of the present invention.
Embodiment
As shown in Figure 1.Two separated wollaston prism high resolution are polarization imaging method simultaneously, the preposition telescopic system 1 that comprises receiving target optical radiation, the front end of preposition telescopic system 1 is light incident section, rear end is light exit side, preposition telescopic system 1 is interior near placing respectively lens combination 2,4 in front and rear end, monochromatic filter 5 is placed in the position of the back lens group 4 of close preposition telescopic system 1, lens combination 4 is relative with monochromatic filter 5, and the relative aperture F of the lens combination 2 of close front end, focal distance f are not both adjustable with measurement target distance.Field stop 3 is placed at the place, focal plane that is positioned at the front lens group 2 of preposition telescopic system 1 between two lens combination 2,4, and lens combination 2,4 and field stop 3 form collimated light path, the rear placement of monochromatic filter 5 of preposition telescopic system 1 divides amplitude module, and a minute amplitude module consists of depolarization Amici prism 6, and a right angle end face of depolarization Amici prism is the plane of incidence, and inclined-plane is light splitting surface, and two other right angle end face is light beam exit facet, two right angle end faces near the 6 smooth outgoing of depolarization Amici prism are placed respectively a minute aperture module, minute aperture module comprises two separated wollaston prisms 8, 12 and two half-wave plates 7, 11, the optical radiation of target is incided depolarization Amici prism 6 after preposition telescopic system 1 collimated light path collimation after monochromatic filter 5 filtering, the inclined-plane of part light transmission depolarization Amici prism 6, the half-wave plate 7 that is 0 ° through position angle after right angle face incides wollaston prism 8, after wollaston prism 8 birefringences, be divided into 0 ° of polarization angle, the two-beam of 90 ° is with certain angle outgoing, another part light is reflected by the inclined-plane of depolarization Amici prism 6, again from the right angle face outgoing of depolarization Amici prism 6, half-wave plate 11 through 22.5 °, position angle incides wollaston prism 12, after wollaston prism 12 birefringences, be divided into the two-beam of 45 ° of deflection angles and 135 ° with certain angle outgoing, also comprise imaging len 9,13 and ccd detector 10,14, lens 9 are imaged on two orthogonal polarisation state light beams of wollaston prism 8 outgoing respectively two parts up and down of ccd detector 10, and lens 13 are imaged on two orthogonal polarisation state light beams of wollaston prism 11 outgoing respectively left and right two parts of ccd detector 14.The four width different polarization states images that ccd detector 10 and ccd detector 14 gather are simultaneously sent into computing machine 15 and are processed, and obtain the Stokes parameter information of measured target.
Principle of work of the present invention: the present invention uses a set of telescopic system, two imaging lens, two CCD, by single exposure, obtain four width different polarization states images of same target simultaneously, further by calculating the Stokes parameter of target light radiation, solved timesharing polarization imaging and minute amplitude application restric-tion of polarization imaging simultaneously, and the requirement of polarization imaging to manufacturing technology level simultaneously of minute He Fen focal plane, aperture.First target light radiation is converged to its focal plane by the lens combination of close front end in preposition telescopic system and locates, in focal plane, field stop is placed at place, light beam is after diaphragm, by back lens group, collimate, monochromatic filter filters, become parallel beam, through undue amplitude mode piece, be divided into polarization state more identical, the two bundle directional lights that the direction of propagation is vertical, wherein light beam is the half-wave plate of 0 ° through position angle, wollaston prism, be divided into polarization angle and be the two-beam of 0 ° and 90 ° with certain angle outgoing, the imaging respectively of two parts up and down by imaging len at CCD, another light beam is through the half-wave plate at 22.5 °, position angle, wollaston prism, be divided into polarization angle and be the two-beam of 45 ° and 135 ° with certain angle outgoing, the imaging respectively of two parts up and down by imaging len at CCD.
Claims (4)
1. pair separated wollaston prism high resolution polarized imaging system simultaneously, comprise preposition telescopic system, divide amplitude module, divide aperture module and 2 large area array CCDs, it is characterized in that: within described minute, aperture module comprises two half-wave plates and two cube wollaston prisms, described preposition telescopic system front end is set as optical radiation incident end, rear end is optical radiation exit end, object radiation obtains compressing collimated light beam by preposition telescopic system, incide the two-way that is divided into vertical outgoing after minute amplitude module, wherein the one group half-wave plate of a road in the module of undue aperture is divided into the two-way that polarization state is different after wollaston prism, two-way is with the outgoing of angle form, and on a large area array CCD in described 2 large area array CCDs, demonstrate the object image at two positions, another road another group half-wave plate in the module of undue aperture is also divided into into the two-way that polarization state is different after wollaston prism, two-way is with the outgoing of angle form, and on another described large area array CCD, demonstrate the object image of two different parts, final disposable exposure realizes the imaging simultaneously of four polarization states on two large area array CCDs,
Further, within described minute, amplitude module comprises a depolarization Amici prism, and the right angle end face of depolarization Amici prism is beam incident surface, and the inclined-plane of depolarization Amici prism is light splitting surface, and two other right angle end face of depolarization Amici prism is light beam exit facet;
The right angle end face of described wollaston prism is relative with two right angle light beam exit facets of depolarization Amici prism respectively, for light entrance face, between the right angle light beam exit facet of one of them wollaston prism and described depolarization Amici prism, place position angle and be the half-wave plate of 22.5 °, light path for balance two-way, between the right angle light beam exit facet of another wollaston prism and described depolarization Amici prism, place position angle and be the half-wave plate of 0 °, described two phase retardations differ half-wave plate and two wollaston prisms formation minute aperture modules of 22.5 °, the optical radiation of target is through collimated light path collimation in preposition telescopic system, monochromatic filter incides described depolarization Amici prism after filtering, part light is from the inclined-plane of described depolarization Amici prism, after right angle face transmission, incide position angle and be half-wave plate and the wollaston prism of 0 °, another part light by after the inclined-plane of described depolarization Amici prism reflection from right angle face transmission, incide position angle and be half-wave plate and the wollaston prism of 22.5 °, light beam outgoing after the birefringence effect of wollaston prism,
Described two large area array CCD detectors are accepted respectively the different polarization states light beam from two wollaston prism outgoing, reduce the resolving power loss that minute aperture module is brought.
2. two separated wollaston prism high resolution as claimed in claim 1 polarized imaging system simultaneously, it is characterized in that: monochromatic filter is placed on the rear end face position near described preposition telescopic system, described preposition telescopic system is inner near placing respectively lens combination in front and rear end, lens combination near rear end face is relative with described monochromatic filter, between former and later two lens combination, the back focal plane place of front lens group places adjustable field stop, former and later two lens combination and field stop form collimated light path.
3. two separated wollaston prism high resolution while polarized imaging system as claimed in claim 1 or 2, is characterized in that: described preposition telescopic system is near the lens combination of front end face, and its relative aperture F and focal distance f are along with image-forming range is not all adjustable.
4. two separated wollaston prism high resolution while polarized imaging system as claimed in claim 1 or 2, is characterized in that: between the image planes of described ccd detector and described wollaston prism, place respectively imaging len.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227934.XA CN102707452B (en) | 2012-07-02 | 2012-07-02 | Double separation wollaston prism high-resolution simultaneous polarization-imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227934.XA CN102707452B (en) | 2012-07-02 | 2012-07-02 | Double separation wollaston prism high-resolution simultaneous polarization-imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102707452A CN102707452A (en) | 2012-10-03 |
| CN102707452B true CN102707452B (en) | 2014-07-16 |
Family
ID=46900366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210227934.XA Active CN102707452B (en) | 2012-07-02 | 2012-07-02 | Double separation wollaston prism high-resolution simultaneous polarization-imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102707452B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197403B (en) * | 2013-04-26 | 2015-01-21 | 苏州大学 | Aperture-divided optical lens for polarization imager |
| CN103592808A (en) * | 2013-11-18 | 2014-02-19 | 苏州精创光学仪器有限公司 | Compact polarization imaging camera wide in field of view |
| CN104793343B (en) * | 2015-04-13 | 2017-04-12 | 西安电子科技大学 | Three-channel and single-Wollaston prism polarization imaging device and polarization information detecting method |
| CN105352603B (en) * | 2015-11-13 | 2017-08-25 | 中国科学院西安光学精密机械研究所 | Polarization imaging system and method for simultaneous detection of full polarization state of aperture-dividing confocal plane |
| CN105511096A (en) * | 2015-12-09 | 2016-04-20 | 大连理工大学 | Single input four-camera in real-time polarization imaging system |
| CN105467609B (en) * | 2016-01-15 | 2017-12-15 | 南开大学 | A kind of the reference light beam-splitting method and its special purpose device of the spatially angular multiplexing holography based on Wollaston prism |
| CN105911072B (en) * | 2016-06-08 | 2018-09-07 | 浙江工业大学 | A kind of optics device for fast detecting of spherome surface slight flaws |
| CN107991784A (en) * | 2016-10-27 | 2018-05-04 | 北京遥感设备研究所 | A kind of imaging optical system that polarization spectro is carried out using wollaston prism |
| CN107340546B (en) * | 2017-07-24 | 2023-05-05 | 南京信息工程大学 | Underwater detection sub-aperture double CCD real-time polarization imaging device and method |
| 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 |
| CN109798980A (en) * | 2019-01-02 | 2019-05-24 | 中国电子科技集团公司第十一研究所 | REAL TIME INFRARED THERMAL IMAGE based on Wollaston prism polarizes double separate imaging optical systems |
| CN115052091B (en) * | 2022-06-14 | 2023-05-09 | 北京理工大学 | Transmission type double-channel compression imaging method and system based on crystal line polarizer |
| CN115826255B (en) * | 2023-02-16 | 2023-04-28 | 长春理工大学 | Airborne sea surface visual search device based on active polarization illumination and use method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201589659U (en) * | 2010-01-13 | 2010-09-22 | 中国科学院安徽光学精密机械研究所 | Optical structure of simultaneous polarization imaging detection system |
| CN102175189A (en) * | 2011-02-14 | 2011-09-07 | 中国科学院光电技术研究所 | Double-beam interference lens center error measuring system |
-
2012
- 2012-07-02 CN CN201210227934.XA patent/CN102707452B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201589659U (en) * | 2010-01-13 | 2010-09-22 | 中国科学院安徽光学精密机械研究所 | Optical structure of simultaneous polarization imaging detection system |
| CN102175189A (en) * | 2011-02-14 | 2011-09-07 | 中国科学院光电技术研究所 | Double-beam interference lens center error measuring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102707452A (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102707452B (en) | Double separation wollaston prism high-resolution simultaneous polarization-imaging system | |
| CN103471715B (en) | A kind of light path combined type light field spectrum imaging method and device altogether | |
| CN201622345U (en) | Laser distance measurement device | |
| CN101614593B (en) | Reflective pyramid wave-front sensor | |
| CN201589659U (en) | Optical structure of simultaneous polarization imaging detection system | |
| CN102564575B (en) | Laser far-field focal spot measuring method based on orthogonal optical wedge light splitting characteristics and focal spot reconstruction algorithm | |
| CN102679907B (en) | High-precision differential interference measuring system and method based on LED light source | |
| CN101876709A (en) | Stripe pipe laser infrared radar imaging detection system | |
| CN106443643A (en) | Optical axis monitoring method and device for high-precision active/ passive detection system | |
| CN102679912A (en) | Auto-collimator based on differential comparison principle | |
| CN102519848A (en) | System and method for measuring three-dimensional volume scattering function of microparticle in water | |
| CN105785389A (en) | Three-dimensional imaging laser radar system | |
| CN109270551A (en) | A kind of planar array scanning formula laser far-distance three-dimension measuring system | |
| CN109870294A (en) | A kind of a wide range of expanding plain shaft parallelism detection device | |
| CN102226718A (en) | Sound light polarization spectrum camera | |
| CN105547480A (en) | High-throughput birefringence interference imaging spectrum device | |
| CN104535184A (en) | Light path structure of prism-grating imaging spectrometer | |
| CN112213737A (en) | Long-distance photon counting three-dimensional laser radar imaging system and method thereof | |
| CN101059370A (en) | High flux, high detection sensitivity minitype polarization interference imaging spectrometer | |
| CN106128514B (en) | Laser fusion target states of matter information multiaxis measuring system | |
| CN104792415A (en) | Complete-polarization high-spectral imaging unit | |
| CN103630118A (en) | Three-dimensional hyperspectral imaging device | |
| CN103197403B (en) | Aperture-divided optical lens for polarization imager | |
| CN109029744A (en) | A kind of detection method of vortex beams topological charge number | |
| CN104931141A (en) | White-light dual-Sagnac polarization imaging method for full Stokes parameter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |