摘要
根据透明固体的光学折射特性,对激光散斑法测量固体折射率遇到的关键问题进行分析讨论,搭建了近场散斑、远场散斑和像面散斑三种光学测量系统并进行了测量,即首先记录了固体折射前后的两幅散斑图,然后获得折射前后的微小面内偏移量,再根据理论公式计算出固体折射率。利用现有方法和改进方法,对厚度为3mm的固体玻璃折射率分别进行了传统全息和数字全息的实验对比研究。
According to the optical refraction characteristic of transparent solid,the key problem encountered in the measurement of solid refractive index by laser speckle method is analyzed and discussed,and three kinds of optical measurement systems including near-field speckle,far-field speckle and image plane speckle are built for measurement.Firstly,two speckle patterns before and after solid refraction are recorded,and then the small in-plane displacement before and after refraction can be obtained.Finally,the refractive index of solid is calculated according to the theoretical formula.Using the existing and improved methods,a comparative experimental study on the refractive index of 3 mm thick solid glass has been carried out through traditional holography and digital holography respectively.
作者
许惠敏
黄若楠
雷豪洁
丁焕林
何俊达
罗劲明
XU Huimin;HUANG Ruonan;LEI Haojie;DING Huanlin;HE Junda;LUO Jinming(College of Physics and Electronic Engineering,Jiaying University,Meizhou 514015,China)
出处
《大学物理实验》
2022年第2期121-124,共4页
Physical Experiment of College
基金
2018年度广东省高等教育教学改革项目(542)
2021年嘉应学院大学生创新创业训练计划项目(S202110582047)
关键词
散斑
固体折射率
传统全息
数字全息
speckle
solid refractive index
traditional holography
digital holography
作者简介
通讯联系人:罗劲明
