小型宽光谱太阳光谱仪光学设计
小型宽光谱太阳光谱仪光学设计Design of a small-size solar spectrograph with wide spectral range
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作 者：高震宇 方伟 张浩 杨振岭 王玉鹏
Gao Zhenyu, Fang Wei, Zhang Hao, Yang Zhenling, Wang Yupeng （1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China）
机构地区：中国科学院长春光学精密机械与物理研究所,吉林长春130033 中国科学院大学,北京100049
出 处：《红外与激光工程》 EI CSCD 2015年第44卷第2期 590-595页,共6页
Infrared and Laser Engineering
基 金：国家自然科学基金（41227003）
摘 要：针对大气层外的太阳光谱辐照度监测,设计了一种星载小型宽光谱太阳光谱仪。光学系统应用改进的切尔尼-特纳光学结构,工作波长范围为600~1 200 nm（二级光谱）和1 200~2 400 nm（一级光谱）;一二级光谱使用二向色分光镜分离,并采用两片线阵探测器同时接收,实现全谱瞬态直读。整个光学结构的尺寸为80 mm×55 mm×20 mm。经过系统优化,全谱段子午方向像差低于6μm。基于惠更斯点扩散函数（PSF）,仿真探测器像元的光谱响应函数（SRF）,结果表明光谱分辨率在600~1 200 nm波段优于2 nm,在1 200~2 400 nm波段优于4 nm。系统结构简单紧凑,稳定性高,适合用于空间太阳光谱辐照度的在轨监测。
A small-size satellite-borne solar spectrograph with wide spectral range was designed to monitor the Solar Spectral Irradiance（SSI） outside the atmosphere. The instrument used a modified Czerny-Turner spectral system. A beam splitter was used to split the spectral coverage into two parts： the first order spectrum ranges from 1 200 nm to 2 400 nm and the second order spectrum ranges from 600 nm to 1 200 nm. Two linear array detectors were used to get the whole spectrum at the same time for a direct-reading spectrum. The dimension of the optical system was about 80 mm ×55 mm×20 mm. After the optimization, the tangential aberration of all the wavelengths was smaller than 6 μm. The Spectral Response Function（SRF） was simulated based on the Point Spread Function（PSF） which obtained by direct integration of Huygens wavelets method. The spectral resolution is superior to 2 nm from 600 nm to 1 200 nm and 4 nm from 1 200 nm to 2 400 nm by analyzing the spectral bandwidth. The structure of the system is simple and compact with a stable performance. The instrument is applied to the measurement of SSI on the satellite.
关键词：太阳光谱仪 二向色分光镜 点扩散函数 光谱响应函数
solar spectrograph ; dichroic beam splitter ; point spread function（PSF） ; spectral response function（SRF） ;
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