非平行光束光栅照明C-T成像光谱仪消像散研究与设计  

Research and design of astigmatism-free for C-T imaging spectrometer under non-parallel grating illumination

作　　者：郝爱花[1,2,3] 胡炳樑[1] 

机构地区：[1]中国科学院西安光学精密机械研究所光谱成像技术实验室,陕西西安710119 [2]西安邮电大学电子工程学院,陕西西安710121 [3]中国科学院大学,北京100049

出　　处：《红外与激光工程》2015年第7期2132-2136,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(11327303);中国科学院空间科学先导专项(XDA04075600)

摘　　要：切尔尼-特纳(Czerny-Turner,C-T)光谱仪是光栅光谱仪中常用的光谱仪器。其结构紧凑,无非球面镜,常被用于单色仪和光谱辐射计中。对于成像光谱仪,像散是影响其空间分辨和光能利用的主要像差。就非平行光束光栅照明像散校正方法进行了理论分析和实验验证,提出会聚和发散光栅照明C-T成像光谱仪都可以进行像散校正,其根本取决于光栅入射角和衍射的余弦平方比大于或小于1,大于1对应发散照明消像散,小于1则对应会聚照明消像散。Czerny-Turner（C-T）spectrometer usually been used monochromators and spectral radiometers due to its compact structure and spherical mirrors. However, astigmatism greatly confines C-T spectrometer used in imaging spectrometers. Astigmatism-free methods were analyzed theoretically and verified experimentally under non-parallel grating illumination. As a result, astigmatism of C-T spectrometer can be corrected under convergent or divergent grating illumination. When the cosine square ratio of grating incidence to difference angle was more than 1, divergent illumination can correct astigmatism. Conversely, when it was less than 1, convergent illumination can correct astigmatism.

关 键 词：会聚照明 C-T成像光谱仪 像散 

分 类 号：N34[自然科学总论]