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为满足在各种谱线分布下对星敏感器探测能力的高准确度标定,提出了一种基于数字微镜器件的光谱可调星模拟器光源光学系统设计方法,以解决星模拟器与星敏感器观星色温不匹配对星敏感器光信号定标准确度产生的问题.首先,根据设计指标选取Czerny-Turner型光学系统为光源光学系统,对Czerny-Turner型光学系统的彗差和象散进行分析,选取消彗差的Czerny-Turner结构;其次利用MATLAB程序求解Czerny-Turner型光学系统初始结构并应用ZEMAX对其进行优化;最后对光学系统进行公差分析.公差分析结果表明,在400~1 100nm的工作谱段范围内,光学系统的光谱分辨率小于2nm,设计结果满足要求,有效降低了光谱不匹配带来的定标误差.
In order to meet the high accuracy calibration of the star sensor detection ability under various spectral distributions, a design method of the spectral adjustable star simulator light source optical system based on the digital micro-mirror device is proposed to solve the problem that the star simulator and the star Sensor star-point color temperature does not match the accuracy of the satellite sensor calibration signal problems.Firstly, according to the design index selected Czerny-Turner optical system as a light source optical system, Czerny-Turner optical system coma and image Then, the Czerny-Turner structure of Czerny-Turner optical system was solved by MATLAB program and optimized by ZEMAX. Finally, tolerance analysis of the optical system was carried out.Results of tolerance analysis showed that at 400 ~ 1 100nm working spectral range, the optical system spectral resolution of less than 2nm, the design results to meet the requirements, effectively reducing the spectral mismatch calibration error.