基于自准直原理的折射率温度系数测量新方法  

A new measurement method of refractive index temperature coefficient based on auto collimation principle

作　　者：汤浩 倪磊[1,2,3] TANG Hao;NI Lei(Key Laboratory of Testing Technology for Manufacturing Process of Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China;Tianfu Institute of Research and Innovation,Southwest University of Science and Technology,Chengdu 610299,China;Institute of Electronics and Information Industry Technology of Kashi,Kashi 844000,China)

机构地区：[1]西南科技大学制造过程测试技术教育部重点实验室,四川绵阳621010 [2]西南科技大学天府新区创新研究院,四川成都610299 [3]喀什地区电子信息产业技术研究院,新疆喀什844000

出　　处：《激光与红外》2024年第11期1730-1736,共7页Laser & Infrared

基　　金：四川省科技厅重点研发计划项目(No.23ZDYF0471)资助。

摘　　要：在透射型光学系统设计中,常用的红外材料包括ZnSe、BaF2和LiF等。为了给光学设计者提供精确的折射率温度系数参数,本文提出了一种自准直原理的偏向角相对测量的新方法,并搭建了一套基于红外单点探测的折射率温度系数测量系统,分析了该方法的精度优势。通过该系统对ZnSe棱镜进行了实验,实验数据与NASA(美国航天局)的CHARMS系统对比,相对误差在1%以内。这一系统解决了宽光谱、宽温域下条件下红外光学材料的折射率温度系数测量的实际问题,对红外光学系统的测量精度有了进一步提高。Commonly used infrared materials in the design of transmissive optical systems include ZnSe,BaF2 and LiF.In order to provide optical designers with accurate refractive index temperature coefficient parameters,a new method of relative measurement of the bias angle based on the auto collimation method is proposed,and a refractive index temperature coefficient measurement system based on infrared single point detection is constructed to analyze the accuracy advantage of the method.Experiments on ZnSe prisms are carried out by this system.And the experimental data are compared with the CHARMS system of NASA(National Aeronautics and Space Administration),and the relative error is within 1%.This system solves the practical problem of refractive index temperature coefficient measurement of infrared optical materials under wide spectral and temperature domain conditions,and further improves the measurement accuracy of infrared optical systems.

关 键 词：红外材料 折射率温度系数 自准直法 偏向角 

分 类 号：TN213[电子电信—物理电子学] O436[机械工程—光学工程]