共轴PGP型光谱仪的玻璃选择与优化  

Glass Selection and Optimization of Coaxial PGP Spectrometer

作　　者：郭宝泽 石恩涛 王咏梅 张贤国[1,2,3] Guo Baoze;Shi Entao;Wang Yongmei;Zhang Xianguo(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;Beijing Key Laboratory of Space En vironment Exploration,Beijing 100190,China;Key Laboratory of Environmental Space Situation Awareness Technology,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]天基环境探测北京重点实验室,北京100190 [3]中国科学院空间环境态势感知技术重点实验室,北京100190 [4]中国科学院大学,北京100190

出　　处：《光学学报》2021年第2期143-148,共6页Acta Optica Sinica

基　　金：中国科学院空间科学战略性先导科技专项(XDA1535010204)。

摘　　要：针对棱镜-光栅-棱镜(PGP)型成像光谱仪装调难度大的问题,通过校正PGP成像光谱仪色差的方法保证探测器像面与光轴垂直,并设计了一款宽波段复消色差的PGP系统。从宽波段复消色差理论出发,计算了三种玻璃材料组合理论色差的最小值,为光学设计的复消色差提供了理论支持。利用光学设计软件优化得到的初始结构,结果表明,PGP系统的二级光谱得到了很好的校正,且探测器的CCD无需倾斜,更方便后期装调。覆盖谱宽为400~1000 nm,视场为9.2 mm,空间分辨率优于10μm,光谱分辨率优于2.8 nm,光学传递函数大于0.7,接近衍射极限,满足成像要求。Aiming at the problem of difficult adjustment of prism-grating-prism(PGP)imaging spectrometer,the method of correcting the chromatic aberration of PGP imaging spectrometer is used to ensure that the detector image plane is perpendicular to the optical axis,and a wide-band achromatic PGP system is designed in this paper.Starting from the wide-band apochromatic theory,the minimum theoretical chromatic aberration of the three glass material combinations is calculated,which provides theoretical support for the apochromatic optical design.Using the optical design software to optimize the initial structure,the results show that the secondary spectrum of the PGP system has been well corrected,and the CCD of the detector does not need to be tilted,which is more convenient for later installation and adjustment.The coverage spectrum width is 400--1000 nm,the field of view is 9.2 mm,the spatial resolution is better than 10μm,the spectral resolution is better than 2.8 nm,and the optical transfer function is greater than 0.7,which is close to the diffraction limit,meeting imaging requirements.

关 键 词：光学设计 成像光谱仪 消色差 二级光谱 

分 类 号：O439[机械工程—光学工程]