像方扫描技术研究  

Technology of image space scanning

作　　者：邓键[1] 李锐钢[2] 郑昌盛[1] 

机构地区：[1]西南技术物理研究所,四川成都610041 [2]长春光学精密机械与物理研究所中国科学院光学系统先进制造技术重点实验室,吉林长春130031

出　　处：《应用光学》2012年第2期284-287,共4页Journal of Applied Optics

摘　　要：基于显微摄影的成像原理,研究了像方扫描以扩大视场的途径,并建立了一个二次成像的设计模型,包括一个大视场的固定前置物镜组和一个运动轨迹为球面的中继透镜组。物镜组所成的一次像面优化了场曲,中继透镜组则根据该场曲进行运动,对一次像面不同区域成像,并采用光学被动消热差以保证不同温度的像质。该模型的相对孔径1∶3,波长3.7μm～4.8μm,焦距90mm,瞬时凝视视场为±4°,扫描视场达±24°,采用7片透镜3个非球面,在全视场范围内具有接近衍射限的像质。Based on the principle of photomicrography, image space scanning is studied to be as the method to expand the optical system＇s field of view （FOV）. An optical design model is in- troduced, which has secondary imaging structure, including a large FOV fixed front objective lens set and a spherical motion relay lens set. The field curvature of the first image plane of the front lens set is optimized, and the motion trochoid of the relay lens set is according to the curve radii. The relay lens set image the different fields of the first imaging plane and get the image space scanning. Optical passive athermaliztion technology is used to ensure the system imaging quality at different temperatures. The model relative aperture is 1：3, the wavelength is 3.7μm-4.8μm ,the focal length is 90mm, the instantaneous staring FOV is ±4°, and the scan FOV is ± 24°. The whole optical system has 7 lenses with 3 asphere surfaces, which is approximate to diffraction limit over the full FOV.

关 键 词：光学设计 像方扫描 二次成像 中波红外 

分 类 号：TN202[电子电信—物理电子学]