天幕靶光学系统性能分析

基于天幕靶的工作原理及现场使用特点,论述了组成天幕靶光学系统的透镜、狭缝、光学变换的功能及相互之间的关系,分析了光学成像透镜的焦距和孔径、狭缝尺寸(长、宽)和位置、光学变换方法等对形成光幕、汇聚光能的作用,以及对探测视场、探测灵敏度、工作稳定性等的影响.针对天空亮度变化过高或过低两个极端条件下,给出了光学透镜、狭缝和光学变换等参数的选择原则.

Analysis to Optical System Performance of the Sky Screens

Bases on the principle and apptication characteristic of sky screens,the levs and slits for consisting the optical system in sky screens,the function of optical trausformation,as well as the relation ship between them have been discusses in the present paper.The effects of focus distance and aperture of optical imaging leus,the sige and position of the slits,and the method of optical transformation on formating optical screen and gathering optical energy,and on the detecting field,sensitivity and stabligation,etc have also been analysed respectively.the common selecfing rules for optical lens,slits and optical transformation have been propsed when the variation of sky light is too high or too low.