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为满足对星敏感器在各种谱线分布下对探测能力的高精度标定,提出了一种基于数字微镜的星模拟器光源系统设计方案,在一定程度上解决了由星模拟器与星敏感器观星的色温不匹配对星敏感器光信号定标精度产生的问题。从理论上分析了光谱不匹配影响定标精度的原理,设计了基于数字微镜器件的光谱可调的恒星光谱模拟系统。采用遗传算法作为光谱匹配,通过遗传算法求解不同的光谱构造函数实现对不同光谱的模拟。最后分别对5 nm分辨率和20 nm分辨率的光谱模拟系统在3 900,4 800,6 500 K 3种色温下进行了测试。测试结果表明,该星模拟器的恒星光谱模拟精度在5 nm分辨率下优于2%,在20 nm分辨率下优于5%。
In order to meet the high-precision calibration of the satellite sensor’s detection capability under various spectral distributions, a design scheme of the star simulator light source system based on digital micro-mirror is proposed, which solves the problem that the star simulator and the star Sensor stargazing does not match the color temperature of star sensor optical signal calibration accuracy problems. Theoretical analysis of the spectral mismatch effect on the calibration accuracy of the principle of design based on the digital micro-mirror device adjustable spectrum spectral star spectroscopy system. Using genetic algorithm as spectral matching, different spectral constructors are solved by genetic algorithm to simulate different spectra. Finally, the spectral simulation system with 5 nm resolution and 20 nm resolution was tested at 3 900,4 800,6 500 K 3 color temperature. The test results show that the star simulator’s star spectral simulation accuracy is better than 2% at 5 nm resolution and better than 5% at 20 nm resolution.