光栅衍射型激光告警光学系统设计

为实时测量来袭激光的特征参数、入射方向等信息,设计了基于光栅的激光告警光学系统.使用正弦透射光栅,来袭激光衍射后只有零级和一级衍射,有利于信号采样和处理.该光学系统由遮光罩、正弦光栅、平凸柱面镜、线阵CCD构成.通过理论分析和计算,确定了各光学元件参数.实验结果表明,采用该光学系统的激光告警器可以实现对波长范围为500～1100 nm、波长分辨率小于等于10 nm、入射角分辨率小于等于1°、视场角为22.5°的激光测量.

Design of Grating Diffraction Laser Warning Optical System

In order to measure the parameters and azimuth of the incident laser,a laser warning optical system based on grating is designed.The incident laser strips passing through the sinusoidal transmission grating only diffract zero and first order,which is useful for signal sampling and processing.This optical system is consisted of shade,sinusoidal grating,planeconvex cylindrical lens and a linear CCD.Parameters of all the optical devices are decided by theoretical analysis and calculation.The experimental resul...