CN201589659U - Optical structure of simultaneous polarization imaging detection system - Google Patents
Optical structure of simultaneous polarization imaging detection system Download PDFInfo
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- CN201589659U CN201589659U CN2010200624765U CN201020062476U CN201589659U CN 201589659 U CN201589659 U CN 201589659U CN 2010200624765 U CN2010200624765 U CN 2010200624765U CN 201020062476 U CN201020062476 U CN 201020062476U CN 201589659 U CN201589659 U CN 201589659U
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Abstract
The utility model discloses an optical structure of a simultaneous polarization imaging detection system, which adopts a combination of an amplitude splitting module and a polarization analysis module, shares an optical system and a CCD detector, can simultaneously acquire four polarization images of the same scene by one measurement, and then resolves problems of sequence measurement and space matching measurement. The optical structure without a movable component can increase polarization measurement precision of instruments, is particularly suitable for polarization detection of quick events, high in data acquisition capacity and simple for operation, realizes intelligence, and has wide application prospects on remote sensing and environmental monitoring and the like.
Description
Technical field
The utility model relates to the photodetection field, especially a kind of optical texture of while polarization imaging detection system.
Background technology
The polarization information of target light radiation can in order to obtain this four Stokes parameter information, will obtain four width of cloth polarized radiation images at least with four complete descriptions of Stokes vector.Design and succeeded in developing the stokes parameter imaging detection system of a lot of versions at present according to this principle.
Main polarization imaging detection mode has two kinds-time-ordered measurement method and space coupling measuring method in the prior art, and all there is certain limiting factor in these two kinds of methods, have restricted the application of polarization imaging technology at other field.At least four width of cloth polarized radiation images that the mode that the time-ordered measurement method adopts moving component or modulation is obtained the different polarization direction successively according to sequential obtain the polarization characteristic of the detection of a target.According to the Stokes theory, the measurement of four Stokes parameters of target must be carried out the truly polarization characteristic of reflection measured target under the same conditions, this requirement has determined time-ordered measurement result's correctness to depend on the hypothesis that target and polarization imaging detection system all remain static in the whole measuring process, and the optical radiation environment is constant, therefore the time-ordered measurement method may be brought corresponding error even false polarization information when the polarization that carries out moving target is surveyed.So method is limited to the detection of static atural objects such as vegetation, mineral, building more, seldom have and survey, and all can't eliminate the influence of atmospheric disturbance polarimetry for the Aero-Space detection of ground object target or the ground measurement of extraterrestrial target for dynamic object.
Space coupling measuring method is used many group polarimetries unit and is spatially made up the polarization characteristic that obtains same target, though this method has solved in the time-ordered measurement method because of repeatedly measuring the problem that exists, but each polarization probe unit (optical system, detectors etc.) the inconsistent of performance is the error component that this method can't be eliminated in polarization is surveyed, cause its detection accuracy not high, the method can't be surveyed for weak polarization information target.
The utility model content
The purpose of this utility model is the optical texture that proposes a kind of while polarization imaging detection system, the use of uniting by minute amplitude module and polarization analysis module, a common cover optical system and the ccd detector that use, can obtain four width of cloth polarized radiation images of Same Scene simultaneously by one-shot measurement, and then obtain the Stokes vector by calculating, solved in the prior art since sequential and space coupling measuring method to problems such as the detection accuracy that many requirements brought of probe unit are low.
In order to achieve the above object, the technical solution adopted in the utility model is:
The optical texture of while polarization imaging detection system, include preposition telescope, it is characterized in that: described preposition telescope front end is a light inputting end, the rear end is the bright dipping end, there is spectral filter to be arranged near described preposition telescopical back-end location, be respectively arranged with the convex lens group near front and back ends in the described preposition telescope, convex lens group near the rear end is relative with described spectral filtering sheet, the focus place that is positioned at the convex lens group of described close front end between the two convex lens groups is provided with field stop, and described convex lens group, field stop constitute collimated light path; Described preposition telescope is outside equipped with branch amplitude module, and the amplitude module comprised the right angle trigonometry beam splitter prism in described minute, and the inclined-plane of described right angle trigonometry beam splitter prism is relative with the convex lens group of close rear end in the described preposition telescope; Right angle face near the outgoing of described right angle trigonometry beam splitter prism light is provided with the polarization analysis module, described polarization analysis module comprises the wollaston prism of two cubics, the right angle face with the light outgoing of described right angle trigonometry beam splitter prism is relative separately respectively for minute surface of described wollaston prism, be incidence surface, also be provided with 1/2 wave plate between the right angle face of one of them wollaston prism and the outgoing of described right angle trigonometry beam splitter prism light, described two wollaston prisms and 1/2 wave plate constitute the polarization analysis module, the radiant light of target is through collimated light path collimation in the preposition telescope, be incident to described right angle trigonometry beam splitter prism after the filtering of spectral filtering sheet, the inclined-plane of described right angle trigonometry beam splitter prism is crossed in part transmittance, be incident to one of them wollaston prism behind the right angle face, another part light is reflected successively by two hypotenuses on described right angle trigonometry beam splitter prism inclined-plane, pass the right angle face of right angle trigonometry beam splitter prism again, be incident to another wollaston prism behind 1/2 wave plate, the incident light in the wollaston prism is outgoing after the birefringence in wollaston prism; Also include ccd detector, the target surface of described ccd detector is aimed at described wollaston prism, receives respectively the birefringent light from two wollaston prism outgoing.
The optical texture of described while polarization imaging detection system is characterized in that: its relative aperture of convex lens group near front end in the described preposition telescope is F=1/2.5, and focal length is f=250mm.
The optical texture of described while polarization imaging detection system is characterized in that: be provided with the convex lens group between the target surface of described ccd detector and the described wollaston prism.
In the utility model, use a cover optical system and a ccd detector, can obtain four width of cloth polarized radiation images of Same Scene simultaneously by one-shot measurement, and then obtain the Stokes vector, eliminate the problem that exists in the coupling mensuration of time-ordered measurement method and space by calculating.The utility model comprises preposition telescope, divides polarization module, polarization analysis module, ccd detector.Its principle of work is: target emanation light is at first converged at focus by the convex lens group near front end in the preposition telescope, place field stop at the focus place, light beam is through behind the diaphragm, by another convex lens group collimation, spectral filter filtering becomes two bundle parallel beams, again through undue polarization mode piece, after the polarization analysis module, image on the target surface of ccd detector.Owing between one of them wollaston prism of polarization analysis module and right angle trigonometry beam splitter prism, be provided with 1/2 wave plate, so the polarization angle of the birefringent light of two wollaston prisms that receive on the target surface of ccd detector differs 45 °.As shown in Figure 2, wherein the image of 0 ° and 90 ° is produced by the wollaston prism that does not have that road light beam of 1/2nd wave plates, and the image of 45 ° and 135 ° is by the wollaston prism generation that road light beam of 1/2nd wave plates is arranged.Ccd detector is converted to electric signal with light signal.In order to compensate the reduction of energy after the light beam beam splitting, preposition telescopical primary mirror relative aperture is F=1/2.5, focal distance f=250mm.
The advantage that the utility model is used is: (1) the utility model movement-less part, and compact conformation, volume is little, and the reliability and stability of system are good; (2) the utility model is not moved by the detection of a target and system self and the influence of external environment disturbance mutually, polarimetry precision height, the method can be used for the detection of weak polarization effect target, very remote such as some extraterrestrial target distance, its luminosity is very faint, the photometry detection means can't separate them from the space, and polarimetry can address this problem; (3) the utility model can obtain the polarization characteristic of the detection of a target by one-shot measurement, and speed of detection is fast, can be used for taking place fast the observation of incident, such as the dynamically detection of military target; (4) characteristics of the present utility model and detection mode have determined it can eliminate the influence of atmospheric disturbance in to the detection process of ground and extraterrestrial target.
Description of drawings
Fig. 1 is the utility model light channel structure figure.
Fig. 2 is the received image synoptic diagram of ccd detector in the utility model.
Embodiment
As shown in Figure 1 and Figure 2.The optical texture of while polarization imaging detection system, include the preposition telescope 1 of receiving target radiant light, the front end of preposition telescope 1 is a light inputting end, the rear end is the bright dipping end, spectral filter 5 is arranged near preposition telescope 1 back-end location, is respectively arranged with convex lens group 2,3 near front and back ends in the preposition telescope, and is relative with spectral filtering sheet 5 near the convex lens group 3 of rear end, convex lens group 2 its relative apertures near front end are F=1/2.5, and focal length is f=250mm.The focus place that is positioned at preposition telescope Inner Front End convex lens group 2 between the two convex lens groups 2,3 is provided with field stop 4, and convex lens group 2,3, field stop 4 constitute collimated light path; The spectral filter 5 of preposition telescope 1 is outside equipped with branch amplitude module, divides the amplitude module to comprise right angle trigonometry beam splitter prism 8, and the inclined-plane of right angle trigonometry beam splitter prism 6 is relative with preposition telescope rear end; Right angle face near the 6 smooth outgoing of right angle trigonometry beam splitter prism is provided with the polarization analysis module, the polarization analysis module comprises the wollaston prism 8 of two cubics, 9, the right angle face with the 6 smooth outgoing of right angle trigonometry beam splitter prism is relative separately respectively for a minute surface of wollaston prism, be incidence surface, also be provided with 1/2 wave plate 7 between the right angle face of one of them wollaston prism 9 and the 6 smooth outgoing of right angle trigonometry beam splitter prism, two wollaston prisms 8,9 and 1/2 wave plate 7 constitutes the polarization analysis module, filtering was incident to right angle trigonometry beam splitter prism 6 through the spectral filtering sheet after the radiant light of target collimated through preposition telescope 1 collimated light path, the inclined-plane of right angle trigonometry beam splitter prism 6 is crossed in part transmittance, be incident to one of them wollaston prism 8 behind the right angle face, another part light is reflected successively by two hypotenuses on right angle trigonometry beam splitter prism 6 inclined-planes, pass the right angle face of right angle trigonometry beam splitter prism 6 again, be incident to another wollaston prism 9 behind 1/2 wave plate 7, the incident light in the wollaston prism is outgoing after the birefringence in wollaston prism; Also include ccd detector 11, be provided with convex lens group 10 between the target surface of ccd detector 11 and the wollaston prism 8,9, the target surface of ccd detector 11 is aimed at wollaston prism 8,9, receives respectively from birefringent light 8,9 outgoing of two wollaston prisms and process convex lens group 10.
Claims (3)
1. the optical texture of polarization imaging detection system simultaneously, include preposition telescope, it is characterized in that: described preposition telescope front end is a light inputting end, the rear end is the bright dipping end, there is spectral filter to be arranged near described preposition telescopical back-end location, be respectively arranged with the convex lens group near front and back ends in the described preposition telescope, convex lens group near the rear end is relative with described spectral filtering sheet, the focus place that is positioned at the convex lens group of described close front end between the two convex lens groups is provided with field stop, and described convex lens group, field stop constitute collimated light path; Described preposition telescope is outside equipped with branch amplitude module, and the amplitude module comprised the right angle trigonometry beam splitter prism in described minute, and the inclined-plane of described right angle trigonometry beam splitter prism is relative with the convex lens group of close rear end in the described preposition telescope; Right angle face near the outgoing of described right angle trigonometry beam splitter prism light is provided with the polarization analysis module, described polarization analysis module comprises the wollaston prism of two cubics, the right angle face with the light outgoing of described right angle trigonometry beam splitter prism is relative separately respectively for minute surface of described wollaston prism, be incidence surface, also be provided with 1/2 wave plate between the right angle face of one of them wollaston prism and the outgoing of described right angle trigonometry beam splitter prism light, described two wollaston prisms and 1/2 wave plate constitute the polarization analysis module, the radiant light of target is through collimated light path collimation in the preposition telescope, be incident to described right angle trigonometry beam splitter prism after the filtering of spectral filtering sheet, the inclined-plane of described right angle trigonometry beam splitter prism is crossed in part transmittance, be incident to one of them wollaston prism behind the right angle face, another part light is reflected successively by two hypotenuses on described right angle trigonometry beam splitter prism inclined-plane, pass the right angle face of right angle trigonometry beam splitter prism again, be incident to another wollaston prism behind 1/2 wave plate, the incident light in the wollaston prism is outgoing after the birefringence in wollaston prism; Also include ccd detector, the target surface of described ccd detector is aimed at described wollaston prism, receives respectively the birefringent light from two wollaston prism outgoing.
2. according to the optical texture of polarization imaging detection system of described while of claim 1, it is characterized in that: near the convex lens group of front end, its relative aperture is F=1/2.5 in the described preposition telescope, and focal length is f=250mm.
3. according to the optical texture of polarization imaging detection system of described while of claim 1, it is characterized in that: be provided with the convex lens group between the target surface of described ccd detector and the described wollaston prism.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279052A (en) * | 2011-06-21 | 2011-12-14 | 中国科学院上海技术物理研究所 | Method for measuring characteristics of polarized light in real time |
| CN102288294A (en) * | 2011-05-09 | 2011-12-21 | 浙江大学 | Amplitude division measuring instrument and measuring method for polarization Stokes parameters |
| CN102707452A (en) * | 2012-07-02 | 2012-10-03 | 北京理工大学 | Double separation wollaston prism high-resolution simultaneous polarization-imaging system |
| 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 |
| CN104749788A (en) * | 2013-12-25 | 2015-07-01 | 南京理工大学 | Beam splitter for realizing full-Strokes polarization imaging |
| CN107340546A (en) * | 2017-07-24 | 2017-11-10 | 南京信息工程大学 | A kind of undersea detection divides the double CCD real-time polarizations imaging devices in aperture and method |
| CN107862272A (en) * | 2017-10-31 | 2018-03-30 | 上海市格致中学 | Burglarproof peep hole |
| CN110207823A (en) * | 2019-03-19 | 2019-09-06 | 天津大学 | Four polarization state of medium-wave infrared while imaging optical system |
| CN113280922A (en) * | 2021-05-24 | 2021-08-20 | 中国科学院云南天文台 | Synchronous polarization observation device and observation method |
-
2010
- 2010-01-13 CN CN2010200624765U patent/CN201589659U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288294A (en) * | 2011-05-09 | 2011-12-21 | 浙江大学 | Amplitude division measuring instrument and measuring method for polarization Stokes parameters |
| CN102279052A (en) * | 2011-06-21 | 2011-12-14 | 中国科学院上海技术物理研究所 | Method for measuring characteristics of polarized light in real time |
| CN102707452A (en) * | 2012-07-02 | 2012-10-03 | 北京理工大学 | Double separation wollaston prism high-resolution simultaneous polarization-imaging system |
| CN102707452B (en) * | 2012-07-02 | 2014-07-16 | 北京理工大学 | Double separation wollaston prism high-resolution simultaneous polarization-imaging system |
| 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 |
| CN104749788A (en) * | 2013-12-25 | 2015-07-01 | 南京理工大学 | Beam splitter for realizing full-Strokes polarization imaging |
| CN107340546A (en) * | 2017-07-24 | 2017-11-10 | 南京信息工程大学 | A kind of undersea detection divides the double CCD real-time polarizations imaging devices in aperture and method |
| 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 |
| CN107862272A (en) * | 2017-10-31 | 2018-03-30 | 上海市格致中学 | Burglarproof peep hole |
| CN110207823A (en) * | 2019-03-19 | 2019-09-06 | 天津大学 | Four polarization state of medium-wave infrared while imaging optical system |
| CN113280922A (en) * | 2021-05-24 | 2021-08-20 | 中国科学院云南天文台 | Synchronous polarization observation device and observation method |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20110113 |