A technical method for integrating stray light influence analysis into opto-mechanical thermal integration analysis
A technology that affects analysis and stray light, applied in measurement devices, instruments, etc., can solve problems such as affecting the detection or identification ability of the system, uneven distribution of stray light on the image surface, and the system being unable to extract targets.
Active Publication Date: 2019-05-03
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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The impact of stray light on space optical instruments, if it is mild, will reduce the signal-to-noise ratio of the target, blur the target image, and reduce the contrast, thus affecting the detection or identification capabilities of the entire system. In the background of astigmatism, the system cannot extract the target, or due to the uneven distribution of stray light on the image plane, false signals are formed on the system detector, which in turn causes the system to detect false targets or even cause the entire system to fail
[0004] Compared with the traditional analysis technology, the optical-mechanical-thermal integration analysis technology has greatly improved, but the analysis of the influence of stray light has not been taken as a part of the analysis technology. Therefore, the current optical-mechanical-thermal integration analysis technology is not perfect.
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[0025] The technical invention selects the optical-mechanical-thermal integration analysis STOP simulation platform as the simulation analysis technology carrier. According to the compatibility of the optical-mechanical-thermal integration analysis platform STOP, the thermal analysis software chooses Thermal Desktop. Like thermal analysis technology, in the process of stray light analysis, the finite element grid node division of CAD model, orbit model, camera heat source, radiation conduction and other attributes are set. The difference is that the grid division is an optical component, and the optical path is visible The structural form of the mechanical components cannot be simplified, and the grid division accuracy is high. In terms of data output, in addition to the thermally concerned temperature field, it is also necessary to output the external heat flow accepted by the focal plane of the detector, and the radiation transfer module calculates the angle coefficient of e...
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The invention discloses a technical method for integrating stray light influence analysis into optical machine thermal integration analysis. The method adopts external heat flux and an angle coefficient in a thermal analysis method, light energy levels of external stray light of a space optical instrument and instrument internal self radiation reaching a detector focal plane are calculated and analyzed, then a shot noise theory is used, and the influence of the stray light on the work performance of the space optical instrument is analyzed, so that the stray light analysis and the thermal analysis are integrated into a same analysis process, and the technical method for integrating the stray light influence analysis into the optical machine thermal integration analysis is achieved.
Description
technical field [0001] The invention belongs to the simulation technology of space optical remote sensing, and specifically relates to a method for integrating the analysis of stray light influence into the existing optical-mechanical-thermal integration analysis technology, which is suitable for the design simulation analysis process of space optical remote sensing instruments, and can effectively reduce the gap between optical analysis and thermal analysis. The number of data iterations in between can save time for design simulation optimization, and the signal-to-noise ratio simulation data at any time when the space optical instrument is working in orbit can be directly obtained. Background technique [0002] With the development of high-precision, quantitative and short-term space optical remote sensing technology, the design and analysis methods of space optical remote sensing instruments are also updated. The most representative one is the simulation analysis of optic...
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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 于清华孙胜利
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI