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Centrally obscured optical imaging system background radiation suppression method

An optical imaging system and background radiation technology, which is applied in the field of background radiation suppression of optical imaging systems, can solve problems such as excessive background radiation of optical imaging systems and reduced system sensitivity, and achieve the effects of reducing thermal noise, improving sensitivity, and increasing detection distance

Active Publication Date: 2019-03-01
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0004] The object of the present invention is to provide a method for suppressing the background radiation of the optical imaging system with central occlusion, to solve the problem of reduced system sensitivity due to excessive background radiation of the optical imaging system

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  • Centrally obscured optical imaging system background radiation suppression method
  • Centrally obscured optical imaging system background radiation suppression method
  • Centrally obscured optical imaging system background radiation suppression method

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Embodiment Construction

[0026] A method for suppressing the background radiation of an optical imaging system with a center obscuration, the specific steps are:

[0027] The first step is to build an optical imaging system background radiation suppression simulation system

[0028] Optical imaging system background radiation suppression simulation system, including: ray tracing module, light window distribution module, detector window occlusion module and background radiation analysis module.

[0029] The ray tracing module is used to track the light direction of targets in different fields of view after passing through the optical system.

[0030] The light window distribution module is used to calculate the spatial distribution of the target light incident on the surface of the detector window,

[0031] The detector window occlusion module is used to calculate the area range where the target light does not fall on the surface of the detector window.

[0032] The background radiation analysis module is used to...

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Abstract

The invention discloses a centrally obscured optical imaging system background radiation suppression method comprising specific steps of constructing an optical imaging system background radiation suppression simulation system including a light tracing module, a light window distribution module, a detector window obscuring module and a background radiation analysis module; tracing, by the light tracing module, target light in different fields of view; calculating, by the light window distribution module, the distribution of the target light in the detector window; calculating, by the detectorwindow obscuring module, a region range required to be obscured of a detector; calculating, by the background radiation analysis module, a background radiation suppression ratio before and after the occlusion of the detector window. Thus, the background stray radiation of the centrally obscured optical imaging system is reduced. The method solves the problem that the detection integration time becomes short due to the high background stray radiation of the imaging system, is beneficial to improvement in the detection sensitivity of the system.

Description

Technical field [0001] The invention relates to a method for suppressing background radiation of an optical imaging system, in particular to a method for suppressing background radiation of an optical imaging system with a central obstruction. Background technique [0002] For photoelectric imaging systems, the background radiation of the system affects the noise of the system and the detection integration time of the system. The higher the background radiation of the system, the greater the optical noise, and the detection integration time will be correspondingly shorter. These two factors directly The distance of the system detector is shortened. Therefore, by effectively suppressing the background radiation of the system, the sensitivity and detection range of the system can be effectively improved. [0003] The main way to suppress the background radiation of the system is to limit the aperture of the detector diaphragm, that is, to increase the system f / #; and to cool the the...

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Application Information

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IPC IPC(8): G02B27/00G06F17/50
CPCG02B27/0012G06F30/20
Inventor 甄政王英瑞李昂周军欧文
Owner BEIJING INST OF REMOTE SENSING EQUIP