固体折射率的激光散斑测量实验

doi:10.14139/j.cnki.cn22-1228.2022.02.026

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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。

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	许惠敏
	黄若楠
	雷豪洁
	丁焕林
	何俊达
	罗劲明

关键词: 散斑固体折射率传统全息数字全息

Abstract:

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 buil 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.

Key words: speckle solid refractive index traditional holography digital holography

出版日期: 2022-04-25 发布日期: 2022-04-25 整期出版日期: 2022-04-25

ZTFLH:

O 438.1

引用本文:

许惠敏, 黄若楠, 雷豪洁, 丁焕林, 何俊达, 罗劲明. 固体折射率的激光散斑测量实验 [J]. 大学物理实验, 2022, 35(2): 121-124.
XU Huimin , HUANG Ruonan , LEI Haojie , DING Huanlin , HE Junda , LUO Jinming. Experiments of Laser Speckle Measurement on Solid Refractive Index . Physical Experiment of College, 2022, 35(2): 121-124.

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http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2022.02.026 或 http://dawushiyan.jlict.edu.cn/CN/Y2022/V35/I2/121

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