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Polarization imaging system

A polarization imaging and superpixel technology, applied in the field of photoelectric detection, can solve the problems of single imaging mode, optical crosstalk, etc., achieve high spatial resolution, meet detection requirements, and high degree of freedom.

Inactive Publication Date: 2021-01-19
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The invention aims to solve the technical problems of optical crosstalk and single imaging mode in the traditional polarization imaging system, and provides a multi-mode common-aperture polarization imaging system, which uses the conjugate relationship of the double telecentric optical path to expand the unit size area of ​​the filter element , to reduce the optical crosstalk between the pixels of the filter element, while maintaining the same spatial resolution and improving the imaging quality of the system

Method used

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0027] The polarization imaging system provided by the embodiments of the present invention will be described in detail below.

[0028] The polarization imaging system provided by the embodiment of the present invention includes: a front mirror group, a filter element, a relay mirror group and a photodetector, the front mirror group and the filter element are respectively located on the object side of the relay mirror group, and the photoelectric detection The filter is located at the image side of the relay lens group, the image plane of the front mirror group coincides with the front...

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Abstract

The invention provides a polarization imaging system. The polarization imaging system comprises a front lens group, a filter element, a relay lens group and a photoelectric detector, wherein the relaylens group adopts a double-telecentric optical path, the front lens group and the filter element are respectively located at the object side of the relay lens group, the photoelectric detector is located at the image side of the relay lens group, the image plane of the front lens group coincides with the front focal plane of the relay lens group, and the filter element is located at the image plane position of the front lens group; and the target light is focused to the front focal plane of the relay lens group through the front lens group for primary imaging to form a first image, and the first image is subjected to secondary imaging at the photoelectric detector through twice Fourier transform of the relay lens group after invalid information of the first image is filtered by the lightfiltering element. According to the invention, the optical crosstalk can be reduced to a reasonable level, the energy concentration ratio of the target is improved, and the method has the characteristics of high signal-to-noise ratio, high degree of freedom and high spatial resolution. And meanwhile, the filters with different functions are switched at the image plane position of the front lens group, so that imaging in multiple modes can be realized.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a multi-mode and common-aperture polarization imaging system. Background technique [0002] The polarization imaging system can provide multi-dimensional target information and effectively improve the detection and recognition capabilities of stealth and camouflaged targets. It is widely used in the field of airborne photoelectric load detection and can make up for the shortcomings of traditional remote sensing technology in target detection. The polarization imaging system divides the frequency spectrum of the target image through polarizing elements, captures all polarization modulation components through polarizing elements with different polarization characteristics, and obtains the polarization state of the target light source through calculation, so as to distinguish between artificial targets and natural scenery, and to achieve the goal in the cluttered back...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/447G01N21/21G01J3/02G02B13/22G02B26/02G02B27/28
CPCG01J3/447G01N21/21G01J3/0224G02B13/22G02B27/28G02B26/023
Inventor 王德江孙雪倩孙翯陈成
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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