基于黑白光栅的宽波段大视场激光告警  

Laser warning with broadband and large field of view based on black-white grating

作　　者：杨雪梅 张瑞[1,2,3] 石金 吴琼 杜伟豪 王志斌 李孟委[1,2,3] YANG Xuemei;ZHANG Rui;SHI Jin;WU Qiong;DU Weihao;WANG Zhibin;LI Mengwei(Engineering and Technology Research Center of Shanxi Provincial for Optical-Electric Information and Instrument,North University of China,Taiyuan 030051,China;Academy for Advanced Interdisciplinary Research,North University of China,Taiyuan 030051,China;Nantong Institute of Intelligent Opto-Mechatronics,North University of China,Nantong 710065,China)

机构地区：[1]中北大学山西省光电信息与仪器工程技术研究中心,山西太原030051 [2]中北大学前沿交叉科学研究院,山西太原030051 [3]中北大学南通智能光机电研究院,江苏南通710065

出　　处：《光学精密工程》2022年第19期2295-2304,共10页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.62105302);山西省自然科学基金资助项目(No.20210302124269,No.201901D111158,No.201901D111145);山西省创新项目(No.2019L0530)。

摘　　要：为了实现激光告警机宽光谱、大视场的高精度探测,提出了一种基于宽波段光栅衍射的大视场二维激光告警探测系统。设计了由宽波段光栅和大视场镜头组成的光学系统,通过采用五组七片式组合透镜结构,实现了水平方向95°、垂直方向72°的大视场探测。镜头的光圈为2.0,入瞳直径为36 mm,保证系统具有很好的通光量。设计加工了光栅常数为2.5μm(占空比为0.6)的宽波段黑白光栅,实现了0.5~1.7μm的宽波段探测。系统中加入多窄带滤光片以滤除背景光的干扰。最后,用典型波长(532,1064,1550 nm)的激光器进行测试,系统探测得到的角度测量误差优于0.7°、激光中心波长的探测精度优于8 nm,通过实验验证了该方法的可行性。To realized laser-warning systems for high-precision detection with a broadband and large field of view,a wide field two-dimensional laser-warning detection system was presented based on broadband black-white grating diffraction.In addition,an optical system comprising a broadband black-white grating and large field-of-view lens was designed.A five-group seven-element combined lens structure was applied to achieve the large field-of-view detection with an azimuth angle of 95°and a pitch angle of 72°.The lens aperture was 2.0,and the pupil diameter was 36 mm.These values ensured that the system exhibited a considerable amount of light transmission.Furthermore,a broadband black-white grating with a grating constant of 2.5μm(and duty cycle of 0.6)was designed and processed,with broadband detection performed from 0.5-1.7μm.Moreover,a multi-narrowband filter is added to the system to filter out background-light interference.Finally,testing with lasers of typical wavelengths(532,1064,and 1550 nm),the angle error achieved by the system is better than 0.7°,the laser center wavelength detection accuracy is better than 8 nm,thus verifying the feasibility of the method experimentally.

关 键 词：激光告警 光学设计 宽波段黑白光栅 激光波长 高精度二维角度 

分 类 号：TH254[机械工程—机械制造及自动化]