滤光片式双视场成像光谱仪光学系统设计  

Optical design of dual field-of-view imaging spectrometer with filters

作　　者：费欣琳 付跃刚[1] 刘智颖[1] 王元鹏[1] 

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《应用光学》2013年第6期943-946,共4页Journal of Applied Optics

基　　金：吉林省自然科学基金(201215131)

摘　　要：为了满足机载搜索与跟踪系统的实际使用要求,根据变焦系统的基本理论和成像光谱系统的特点,设计一个滤光片式双视场成像光谱仪光学系统实例。系统采用1/3英寸CCD接收,像元尺寸为6.0μm×6.0μm。通过高斯法分析与求解得到初始结构,使用Zemax软件对其优化,实现0.45μm^0.7μm/0.6μm^0.95μm双波段清晰成像,通过轴向移动变倍组完成13°×9.75°/3°×2.25°双视场转换,在视场切换过程中,F数为5.6且恒定不变。设计结果表明:在各谱段下系统宽视场畸变<3.5%,窄视场畸变<0.2%,探测器的Nyquist频率50lp/mm处光学传递函数的峰值均大于0.5,系统的最小后截距大于35mm,用以安装滤光片轮,满足装配要求。In order to meet the practical requirement of airborne searching and tracking systems, a dual field-of-view imaging spectrometer with filters was designed based on the theory of zoom system and imaging spectrometer. The CCD of 1/3 inches was used, and the size of the pixel was 6.0μm×6.0μm . The initial structure was obtained by using the Gaussian method, the system was optimized by using Zemax software. Dual waveband （0.45μm～0.7μm/0.6μm～O.95μm） clear imaging was achieved, axial moving group could complete double field-of-view switch（13°×9.75°/3°×2.25°~）. In this process, F number was 5.6 and constant. The design results show that the distortion of the wide-FOV is less than 3.5 %, the distortion of the narrow-FOV is less than 0. 2 %, The peak values of MTF are more than 0.5 at Nyquist 50 lp/mm and the minimum back intercept range of the system is greater than 35 mm to install filters, which meets the assembly requirements.

关 键 词：光谱成像 双视场 光学设计 滤光片 

分 类 号：TN202[电子电信—物理电子学] TH741[机械工程—光学工程]