观瞄仪目标发生器准直投影系统的设计

针对空间标准动态目标发生器的设计指标要求, 对卡塞格林R-C系统进行了改进, 通过在第2镜和像面之间加入一片双曲面镜, 设计完成了焦距为1 600 mm、相对孔径为1∶1.2、视场角为1°、工作波段在0.4 μm~0.7 μm和8 μm~12 μm的共轴三反射光学系统。设计结果表明: 该系统弥散斑RMS小于5 μm, 在可见光波段与远红外波段相应的空间频率处, 此共轴三反系统的调制传递函数值均大于0.7, 接近衍射极限, 满足系统对成像质量的要求。

Abstract

According to the requirements of design specifications for standard dynamic target generator of space, we improved the Cassegrain R-C system, namely joining a hyperboloidal mirror between the second lens and image plane. The optical system can collimate the output from liquid crystal light valve in 0.4 μm~0.7 μm and 8 μm~12 μm, and enable an image system to be tested out of 1° field of view. The effective focal length is 1 600 mm and the relative effective aperture is F/1.2 .The result indicates that the diffuse plaque root-mean-square(RMS) is less than 0.5,the modulation transfer function (MTF)of the coaxial three-mirror system values is always greater than 0.7,and close to the diffraction limit at the corresponding spatial frequency of visible and far-infrared band,hence the coaxial three-mirror system meets the requirements of image quality.

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韩军, 师永栋, 陈文建, 杨建莉, 胡斐. 观瞄仪目标发生器准直投影系统的设计[J]. 应用光学, 2016, 37(5): 663. Han Jun, Shi Yongdong, Chen Wenjian, Yang Jianli, Hu Fei. Design of collimating projection system used for target generator of sighting instrument[J]. Journal of Applied Optics, 2016, 37(5): 663.

观瞄仪目标发生器准直投影系统的设计

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