光谱连续可调星敏感器地面标定系统设计
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摘要
为解决由于色温不匹配对星敏感器光信号定标精度产生的影响,提出一种光谱连续可调星敏感器地面标定系统设计方案.该高精度准直光学系统的光谱范围为500~800 nm,像质测试结果表明,全视场畸变小于0.08%,MTF在60 1p·mm~(-1)处大于0.6.基于DMD光源系统的组成和工作原理,对光谱分辨率和光谱曲线模拟精度进行分析,设计了一套光谱分辨率全谱段优于2nm的Czerny-Turner分光系统.测试结果表明,星点位置精度优于7″;光谱分辨率为10 nm和20 nm时光谱曲线模拟精度分别优于2%和5%,有效降低了由于色温不匹配对星敏感器标定精度的影响.
In order to reduce the effect on calibration precision of star sensor's optical signal caused by the mismatching color temperature, a design of star sensor's ground calibration system with adjustable spectrum is presented. The spectrum range of the high-precision collimating optical system is from 500 nm to 800 nm, and the image quality evaluation shows that the distortion is less than 0.08% and the Modulation Transfer Function(MTF) is greater than 0.6 at 601p·mm~(-1). The composition and working principle of the DMD-based light source system are described, the spectrum resolution and the simulation accuracy are analyzed, and a set of Czerny-Turner light splitting optical system which spectrum resolution is better than 2 nm is designed. The test result of the star sensor's ground calibration system shows that the accuracy of the star position is better than 7″, and the accuracy of the star spectrum is better than 2% as the spectrum resolution is 10 nm and better than 5% as the spectrum resolution is 20 nm, the calibration error caused by the mismatching color temperature is significantly reduced.
In order to reduce the effect on calibration precision of star sensor's optical signal caused by the mismatching color temperature, a design of star sensor's ground calibration system with adjustable spectrum is presented. The spectrum range of the high-precision collimating optical system is from 500 nm to 800 nm, and the image quality evaluation shows that the distortion is less than 0.08% and the Modulation Transfer Function(MTF) is greater than 0.6 at 601p·mm~(-1). The composition and working principle of the DMD-based light source system are described, the spectrum resolution and the simulation accuracy are analyzed, and a set of Czerny-Turner light splitting optical system which spectrum resolution is better than 2 nm is designed. The test result of the star sensor's ground calibration system shows that the accuracy of the star position is better than 7″, and the accuracy of the star spectrum is better than 2% as the spectrum resolution is 10 nm and better than 5% as the spectrum resolution is 20 nm, the calibration error caused by the mismatching color temperature is significantly reduced.
引文
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[11]LIU Jianpeng,TANG Yi,HUANG Gang,et al.Design method of optical system of improved czerny-turner imaging spectrometer[J].Acta Opt.Sin.,2012,32(3):0322007(刘健鹏,唐义,黄刚,等.改进型Czerny-Turner成像光谱仪光学系统设计方法[J].光学学报,2012,32(3):0322007)
[12]CHEN Feng,ZHENG Xiaobing.Influence of spectrum not-matching on calibration precision of remote sensor[J].Opt.Precision Eng.,2008,16(3):415-419(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)
[2]UMAMAHESWARAN S,NAGENDRA S.Microcontroller based multi-star simulator using controller area network(CAN)[C]//Proceedings of the IEEE 2009 National Aerospace&Electronics Conference(NAECON).Dayton,OH:IEEE,2009:139-145
[3]SUN Gaofei,ZHANG Guoyu,LIU Shi,et al.Star position correction of dynamic star simulator based on distortion effect[J].Chin.J.Space Sci.,2014,34(6):887-893(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)
[4]FRYC I,BROWN S W,EPPELDAUER G P,et al.Ledbased spectrally tunable source for radiometric,photometric,and colorimetric applications[J].Opt.Eng.,2005,44(11):111309
[5]ZHU Jiyi,REN Jianwei,LI Baoyong,et al.Synthesis of spectral distribution for LED-based source with tunable spectra[J].Chin.J.Lumin.,2010,31(6):882-887(朱继亦,任建伟,李葆勇,等.基于LED的光谱可调光源的光谱分布合成[J].发光学报,2010,31(6):882-887)
[6]WALL C F,HANSON A R,TAYLOR J A F.Construction of a programmable light source for use as a display calibration artifact[C]//Proceedings of SPIE 4295,Flat Panel Display Technology and Display Metrology II.San Jose,CA:SPIE,2001:259-266
[7]LIU Hongxing,REN Jianwei,LI Baoyong,et al.Spectrum-tunable distribution and spectral matching for integrating sphere light source based on bromine tungsten lamps and LEDs[J].Chin.J.Lumin.,2011,32(10):1074-1080(刘洪兴,任建伟,李葆勇,等.基于溴钨灯和LED积分球光源的可调谐光谱分布及光谱匹配[J].发光学报,2011,32(10):1074-1080)
[8]LI Xiaoni,WU Cuigang,ZHAO Xin,et al.The research of the light source for star simulator with automatic calibration and adjustable spectrum[J].Acta Photon.Sin.,2015,44(5):0522003(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):0522003)
[9]BEUTLER H G.The theory of the concave grating[J].J.Opt.Soc.Am.,1945,35(5):0212003
[10]LIU Hongxing,REN Jianwei,LIU Zexun,et al.LEDbased single star simulator with multi-color-temperature and multi-star-magnitude output[J].Acta Opt.Sin.,2015,35(2):0212003(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):0212003)
[11]LIU Jianpeng,TANG Yi,HUANG Gang,et al.Design method of optical system of improved czerny-turner imaging spectrometer[J].Acta Opt.Sin.,2012,32(3):0322007(刘健鹏,唐义,黄刚,等.改进型Czerny-Turner成像光谱仪光学系统设计方法[J].光学学报,2012,32(3):0322007)
[12]CHEN Feng,ZHENG Xiaobing.Influence of spectrum not-matching on calibration precision of remote sensor[J].Opt.Precision Eng.,2008,16(3):415-419(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)