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

作　　者：高震宇[1,2] 方伟[1] 张浩[1,2] 杨振岭[1] 王玉鹏[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2015年第2期590-595,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 

分 类 号：O433[机械工程—光学工程] TH744[理学—光学]