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Aperture-divided compact broadband polarization simultaneous imaging device and system

An imaging device and compact technology, applied in optical components, optics, instruments, etc., can solve problems such as real-time detection and identification of difficult targets, and achieve real-time response, high reliability, and good sensitivity and real-time performance.

Active Publication Date: 2021-04-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the technical problem that the existing polarization imaging system is difficult to realize real-time detection and identification of targets, especially high-speed moving targets, under complex backgrounds such as low contrast or target camouflage, and to provide a compact wide-band polarizer with sub-aperture Simultaneous imaging device and system

Method used

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  • Aperture-divided compact broadband polarization simultaneous imaging device and system
  • Aperture-divided compact broadband polarization simultaneous imaging device and system
  • Aperture-divided compact broadband polarization simultaneous imaging device and system

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Embodiment

[0081] The technical indicators are as follows:

[0082] Total length of optical system TTL : 830mm;

[0083] The total focal length of the system ƒ: 2000mm;

[0084] Afocal system angular magnification :6;

[0085] Optical system aperture FNO: 10;

[0086] Optical system field of view: 0.42°;

[0087] The optical system uses the wavelength range: 450nm~850nm.

[0088] Structural parameters of each lens in the split-aperture compact broadband polarization simultaneous imaging device:

[0089]

[0090] In the table, Mirror is a reflector, and SILICA_SPECIAL is fused silica. Figure 4 to Figure 6 It is the arrow indication diagram of the 25 lens surfaces in Table 1 above, where the ninth surface is a virtual surface (a surface that does not exist in reality, so it is not shown in the figure);

[0091] Figure 7 It is the MTF (modulation transfer function) curve of the simulated 0° polarized light channel working in the wavelength range of 450nm~850nm, indicating th...

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Abstract

The invention relates to an aperture-divided compact broadband polarization simultaneous imaging device and system. The objective of the invention is to solve the technical problem that real-time detection and identification of a target, especially a high-speed moving target, are difficult to realize under the complex background of low contrast or target camouflage and the like in the existing polarization imaging system. A first reflector, a first lens group, a second lens group, a third reflector and a fourth reflector of the device are sequentially arranged along an optical axis; the second reflecting mirror is located between the first reflecting mirror and the third reflecting mirror, and light through holes a are formed in the centers of the second reflecting mirror and the third reflecting mirror. The first lens group and the second lens group are arranged at the light through hole a in the second reflector; the reflecting surfaces of the first reflecting mirror and the second reflecting mirror are opposite, and the reflecting surfaces of the third reflecting mirror and the fourth reflecting mirror are opposite. The telescope objective lens unit and the focus-reducing collimator objective lens unit form an afocal system; the entrance pupil planes of the four imaging objective lens units are all located on the exit pupil plane of the afocal system.

Description

technical field [0001] The invention relates to a polarization simultaneous imaging device and system, in particular to a split-aperture compact wide-band polarization simultaneous imaging device and system. Background technique [0002] The existing target detection imaging methods mainly include photometric imaging, spectral imaging and polarization imaging. [0003] Photometric imaging is difficult to recognize the target when the target light intensity is similar to the background light intensity. With the development of new special (camouflage and concealment) materials and their application on targets, the camouflage and concealment performance of targets has been greatly improved, and photometric imaging is gradually difficult to do. However, spectral imaging is easily disturbed, has poor stability, and has a short spectral range, making it difficult to adapt to complex application environments such as diverse targets. Therefore, in complex backgrounds such as low c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G02B17/08G02B27/00
Inventor 任志广李旭阳王炜袁灏马子轩褚楠清姚睿
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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