非共面Offner结构高分辨率成像光谱仪设计

发布时间：2017-12-28 21:00

本文关键词：非共面Offner结构高分辨率成像光谱仪设计　出处：《光学学报》2016年02期 　论文类型：期刊论文

【摘要】：Offner成像光谱仪在大色散需求下成像质量不足并且易发生光线遮挡,为此设计了一种基于罗兰圆条件的非共面Offner结构光谱仪。分析并推导出了一种非共面Offner结构成像光谱仪的消除像散及彗差同时解决光线遮挡的设计方法。使用该方法设计出光谱范围为350~1000 nm,色散宽度为12.6 mm的成像光谱仪。在奈奎斯特频率(30 lp/mm)下其调制传递函数在全视场、全光谱范围优于0.78,点列图均方根半径优于4μm,同时,系统的谱线弯曲及谱带弯曲均小于1%像元尺寸。最后,将非共面Offner结构成像光谱仪与传统Offner结构进行对比,结果表明,在高光谱分辨率需求下,当入射狭缝较小时,非共面Offner结构光谱仪具有更好的成像质量,并且在谱线弯曲及谱带弯曲的控制上具有优势,可用于小体积高光谱分辨率成像光谱仪器设计。
[Abstract]:Offner imaging spectrometer has low imaging quality and light occlusion under large dispersion demand. Therefore, a non coplanar Offner structure spectrometer based on Loran circle condition is designed. The paper analyses and deduces a non coplanar Offner structure imaging spectrometer to eliminate astigmatism and coma at the same time to solve the design method of light shielding. This method is used to design an imaging spectrometer with a spectral range of 350~1000 nm and a dispersion width of 12.6 mm. At Nyquist frequency (30 lp/mm), its modulation transfer function is better than 0.78 in the full field and all optical spectrum, and the root mean square radius of point train is better than 4 m. Meanwhile, the spectral line bending and spectral band bending of the system are less than 1% pixel size. Finally, the non coplanar Offner structure imaging spectrometer and traditional Offner structure were compared, the results show that the spectral resolution in high demand, when the entrance slit is small, the imaging quality of non coplanar Offner spectrometer has a better structure, and has the advantage of spectral line bending and bending of the band spectrum control, can be used in the design of small volume high the spectral resolution imaging spectrometer.
【作者单位】：中国科学院长春光学精密机械与物理研究所;中国科学院大学;
【基金】：国家自然科学基金(41474161)
【分类号】：TH744.1
【正文快照】： 1引言光谱成像是一种将光谱分析与图像处理相结合的技术,已广泛地应用于航空航天遥感、军事侦察和农业、灾害监测等方面[1-3]。除此之外,在医学诊断及食品药品的质量控制中,光谱成像技术也获得了广泛应用[4-5]。在这些应用中,往往空间分辨率会影响图像的还原能力,而光谱分辨率

【相似文献】