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Dynamic local polarization imaging system of dual detector

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: 2019-02-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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  • Dynamic local polarization imaging system of dual detector

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Embodiment Construction

[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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Abstract

The invention discloses a dynamic local polarization imaging system of a dual detector. A beam splitter is used to split a beam into two paths, and a reflected light path is a full field of view intensity image. A local polarization image is formed on the region of interest after a transmitted light path passes through a scanning aperture field diaphragm. The invention utilizes a spectroscopic sheet 3 to separate a target light, and obtains a target intensity image under the full field of view without loss of transmittance. The use of a large aperture polarizer can be avoided, thereby saving alot of cost since the scanning aperture field diaphragm 6 and a following polarizing wheel 7 are used to realize dynamic scanning of the region of interest so as to obtain a polarization image of theregion of interest. The refresh rates of the dual detector can become different by adopting the dual detector imaging, so that different images with different refresh rates can be obtained.

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...

Claims

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Application Information

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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