光学畸变对大孔径静态干涉成像光谱仪影响的建模与仿真  

Modeling and Simulation of Effect of Optical Distortion on the Large Aperture Static Imaging Spectrometer

作　　者：吕群波[1] 相里斌[1,2] 姚涛[1,3] 景娟娟[1] 王忠厚[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]中国科学院光电技术研究院,北京100190 [3]中国科学院研究生院,北京100049

出　　处：《光谱学与光谱分析》2010年第1期142-145,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60532070);国家"973"项目(2009CB724005)资助

摘　　要：大孔径静态干涉成像光谱技术是近年来出现的一种新型干涉成像光谱技术,具有原理简单、稳定性高等诸多优点,但是仪器对光学系统的设计要求苛刻。特别是光学系统的畸变,对仪器获取的数据有较大的影响,并最终影响仪器的应用。通过对仪器获取数据机理的分析,给出光学系统畸变影响下的数据模型,为仪器的性能评估提供可能。最后在4%的畸变值条件下,利用模型和既定参数对畸变影响进行计算机仿真,由仿真结果可以看出,虽然该畸变对于普通的光学成像系统来说是可以容忍的,但是对于大孔径静态干涉成像光谱仪来说,复原光谱不但存在>5%的相对偏差,而且光谱位置在长波处产生了近8 nm的偏移,从而导致光谱无法应用,因此该畸变是不可容忍的。As a new type Fourier transform imaging spectrometry, large aperture static imaging spectrometry （LASIS） has come forth in recent years, which has many advantages such as simple principle, high stability and so on. However, the requirement for the optical system design of LASIS was very harsh. As one of the optical aberrations, optical distortion degrades the data quality acquired by LASIS, consequently limits its applications. According to the analysis of the data acquisition principle of LASIS, the data model with the effect of optical distortion was presented, which could be used for LASIS performance pre-evaluation. Finally, the computer simlulation of the data model was achieved with supposed parameters. The simulation results indicated that the relative error more than 5% was induced in the recovery spectrum, and approximate 8 nm spectral line deviation was occurred at the long wavelength region. The results show that the 4% optical distortion was inapplicable for LASIS although it is acceptant for common optical imaging system.

关 键 词：成像光谱技术 大孔径 光学系统 光学畸变 计算机仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]