A Dual-Detector Dynamic Local Polarization Imaging System
A polarized imaging and dual-detector technology, applied in the field of optical imaging, can solve the problems of increased cost and low transmittance of polarizers, and achieve cost-saving effects
Active Publication Date: 2021-06-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0003] In view of this, the purpose of the present invention is to provide a dual-detector dynamic partial polarization imaging system, which can solve the problems of low transmittance of polarizers and obvious increase in cost as the aperture increases in polarization imaging
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[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0020] A dual-detector dynamic partial polarization imaging optical system, comprising:
[0021] Aperture stop 1, objective lens 2, beam splitting plate 3, first relay lens 4, first detector 5, pinhole field stop 6, polarizer wheel 7, second relay lens 8 and second detector 9, of which:
[0022] Aperture diaphragm 1 is used to limit the aperture angle of the plane light emitted by the point on the axis of the system;
[0023] Objective lens 2 is used to form an intermediate image of the target;
[0024] The beam splitting plate 3 is used to divide the optical signal transmitted by the objective lens 2 into two parts, the reflected light path and the transmitted light path;
[0025] The first relay lens 4 is used for focusing and imaging the optical signal reflected by the light splitter plate 3, that is, the intermediate image formed by the objective le...
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The invention discloses a dual-detector dynamic partial polarization imaging optical system. A beam splitter is used to divide the light beam into two paths, the reflected light path forms an intensity image of the full field of view, and the transmitted light path passes through the scanning small hole field of view diaphragm. The region of interest forms a local polarization image; the present invention uses a spectroscopic flat plate (3) to separate the target light one way, and obtains the target intensity image under the full field of view without loss of transmittance; The aperture (6) and the polarizer wheel (7) that moves with it realize the dynamic scanning of the region of interest and obtain the polarization image of the region of interest, so the use of a polarizer with a large aperture can be avoided, which can greatly save costs; at the same time, The present invention adopts dual-detector imaging, which can make the refresh frequencies of the dual detectors different, thereby obtaining images with different refresh rates.
Description
technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to a dual-detector dynamic partial polarization imaging system. Background technique [0002] With the continuous development of imaging technology, the importance of target polarization information in target detection and recognition is increasing day by day. The polarization characteristics of the target can provide information such as surface roughness, texture orientation, surface orientation, electrical conductivity, and physical and chemical properties of the material. By observing the polarization characteristics of the target, the existence or state of the target can be determined. Using polarization technology, according to the difference between its polarization state and background, it can be effectively identified and observed, which undoubtedly has extremely high application value in the military field. The use of polarization technology can also r...
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IPC IPC(8): G01J4/00
CPCG01J4/00G01J4/04
Inventor 常军刘鑫宋大林沈本兰张泽霞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY