基于数字微镜的光谱可调星模拟器光源系统
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摘要
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 satisfy the high precision calibration of the detection capability of the star sensor under various spectral distribution,a design method of star simulator light source system based on digital micro-mirror device was proposed,and the issue of star sensor optical signal calibration precision caused by the mismatching between star simulator's color temperature and star sensor's detecting color temperature was partly solved. The principle of how color temperatures mismatching affected the calibration accuracy was analyzed,and a spectral tunable stellar spectrum simulation system based on digital micro-mirror device was designed. The genetic algorithm was used to perform spectral matching,and different spectral constructors were solved by the genetic algorithm to achieve the simulation of different spectra. Finally,the simulation system was simulated by three kinds of color temperature of 3 900,4 800 and 6 500 K at the spectral resolution of 5 nm and 20 nm. The simulation results show that the accuracy of the star spectrum is better than 2% at the spectral resolution of 5 nm and better than 5% at the spectral resolution of 20 nm.
In order to satisfy the high precision calibration of the detection capability of the star sensor under various spectral distribution,a design method of star simulator light source system based on digital micro-mirror device was proposed,and the issue of star sensor optical signal calibration precision caused by the mismatching between star simulator's color temperature and star sensor's detecting color temperature was partly solved. The principle of how color temperatures mismatching affected the calibration accuracy was analyzed,and a spectral tunable stellar spectrum simulation system based on digital micro-mirror device was designed. The genetic algorithm was used to perform spectral matching,and different spectral constructors were solved by the genetic algorithm to achieve the simulation of different spectra. Finally,the simulation system was simulated by three kinds of color temperature of 3 900,4 800 and 6 500 K at the spectral resolution of 5 nm and 20 nm. The simulation results show that the accuracy of the star spectrum is better than 2% at the spectral resolution of 5 nm and better than 5% at the spectral resolution of 20 nm.
引文
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[2]UMAMAHESWARAN S,NAGENDRA S.Microcontroller based multi-star using controller area network(CAN)[J].IEEE,2009:139-145.
[3]孙高飞,张国玉,刘石,等.星敏感器光谱探测能力用地面模拟测试系统设计[J].空间科学学报,2014,34(6):887-893.SUN G F,ZHANG G Y,LIU S,et al..Star position correction of dynamic star simulator based on distortion effect[J].Chin.J.Space Sci.,2014,34(6):887-893.(in Chinese)
[4]张晓娟,张国玉,孙高飞,等.基于混合光源的星模拟器光谱研究[J].光子学报,2014,43(2):0222001.ZHANG X J,ZHANG G Y,SUN G F,et al..Spectral study for simulator on hybrid light source[J].Acta Photon.Sinica,2014,43(2):0222001.(in Chinese)
[5]陈风,郑小兵.光谱非匹配对光学遥感器定标精度的影响[J].光学精密工程,2008,16(3):415-419.CHEN F,ZHENG X B.Influence of spectrum not-matching on calibration precision of remote sensor[J].Opt.Precision Eng.,2008,16(3):415-419.(in Chinese)
[6]李晓妮,吴璀罡,赵昕,等.自动标定型光谱可调星模拟器光源系统[J].光子学报,2015,44(5):173-178.LI X N,WU C G,ZHAO X,et al..The research of the light source for star simulator with automatic calibration and adjustable spectrum[J].Acta Photon.Sinica,2015,44(5):173-178.(in Chinese)
[7]WALL C F,HANSON A R,TAYLOR J A F.Construction of a programmable light source for use as a display calibration artifact[J].SPIE,2001,4295:259-266.
[8]刘洪兴,任建伟,刘则洵,等.基于LED的多色温多星等单星模拟器[J].光学学报,2015,35(2):179-186.LIU H X,REN J W,LIU Z X,et al..LED-based single star simulator with multi-color-temperatue and multi-star-magnitude output[J].Acta Opt.Sinica,2015,35(2):179-186.(in Chinese)
[9]刘洪兴,刘则洵,李葆勇,等.基于多光源的光谱分布可调谐光源系统[J].光学精密工程,2014,22(9):2345-2351.LIU H X,LIU Z X,LI B Y,et al..Spectrum-tunable light source based on mulit-sources[J].Opt.Precision Eng.,2014,22(9):2345-2351.(in Chinese)
[10]万志,李葆勇,李宪圣,等.积分球光源分布温度对宽波段光学遥感绝对辐射定标的影响及其校正[J].发光学报,2010,33(8):863-868.WAN Z,LI B Y,LI X S,et al..Influence of integrating sphere source’s distribution temperature on broadband optical remote sensor’s absolute radiometric calibration and correcting methods[J].Chin.J.Lumin.,2010,33(8):863-868.(in Chinese)
[11]HOLLAND J.Adaption in Natural and Artificial Systems:An Introductory Analysis with Applications to Biology,Controland Artificial Intelligence[M].Cambridge:MIT Press,1992.
[12]郑少林,王霞,金伟其,等.基于遗传算法的夜天光光谱匹配方法研究[J].光子学报,2016,45(3):133-137.ZHENG S L,WANG X,JING Q W,et al..Research of night sky radiation spectral matching method based on genetic algorithm[J].Acta Photon.Sinica,2016,45(3):133-137.(in Chinese)
[13]汪定伟,王俊伟,王洪峰,等.智能优化算法[M].北京:高等教育出版社,2007.WANG D W,WANG J W,WANG H F,et al..Intelligent Optimization Methods[M].Beijing:Higher Education Press,2007.(in Chinese)
[14]陈风.基于LED的光谱分布可调光源系统的研制及应用[D].合肥:中国科学院合肥物质科学研究院,2008.CHEN F.Development and Application of The Spectrally Tunable Source Based on LED[D].Hefei:Hefei Institutes of Physical Science,Chinese Academy of Sciences,2008.(in Chinese)
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