Optimization Design Research Of Backward Stray Light Inhibition For Space High-precision Optical System

As the space optical technology and many kinds of photoelectric detector technology‘s fast development,inhibition of miscellaneous light and analysis was increased to an important position.The strong noise radiation through aperture diffraction in optical system,and the structure and the scattering on the surface of the optical parts,form of mixed light reach system on the surface. The success of the system of mixed light inhibition or not,even the "bottleneck" in a certain space environment to further improve the optical performance of the system.Therefore the generation and transmission and calculate to the noise light of the system,the use of the parasitic light braking measure and the design of the shading system,material surface BRDF and image plane illumination system is analyzed.Subject according to the actual task requirements,make an optical design and stray light analysis to the high precision optical system to meet the specific needs of the space. Among them, the optical design is divided into card plug green system, with branch, thick with branch, and branch, branch and launch branch and other optical design of communication. And integrated card plug green system,respectlyanalysises the stray light for branch, thick with branch, and branch, branch and launch branch of communication. Through the analysis of the stray light,improve the system to make the whole system signal-to-noise ratio reach 50.72 dB.Finally, analyze the off-axis aberration of the system.The total effective energy below 3.667 e-008 W in the Incident system front-end and the minimum threshold of the detector is 0.5 nW. The simulation results till now,the extinction ratio must be greater than 10 e.So it is perfect to the inhibition effect of off-axis miscellaneous lightin this system.Itcan meet the requirement of working with the sun Angle is 3 °.