Real-time measuring system for liquid refractive index based on Fourier transform spectrum analysis

Q4 Physics and Astronomy
PAN Yun, ZHANG Jianbing, ZHOU Peng, GU Guoqing
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引用次数: 0

Abstract

提出了一种基于傅里叶变换频谱分析技术的数字化、高精度、便携式液体折射率实时干涉测量系统。该系统以劈尖形液体容器构成的等厚干涉测量光路为基础,搭建了以CCD(charge coupled device)相机记录的共路干涉测量系统。以树莓派硬件系统为平台,Python语言为编程基础,通过傅里叶变换频谱分析和三次样条插值实现记录窗口内干涉条纹数的精确提取。设计了图形操作界面,实现了测量过程的动态可视,测量过程只需提前标定未注入液体时的初始干涉条纹数,无需额外预设参数即可实现流动液体折射率的实时测量。实验中分别测定了3种液体的折射率,并验证了测量系统的时间稳定性。结果表明,当初始干涉条纹数大于180条时,测量系统有较好的时间稳定性,且测量的相对误差均在0.754%以内。
基于傅里叶变换光谱分析的液体折射率实时测量系统
提出了一种基于傅里叶变换频谱分析技术的数字化、高精度、便携式液体折射率实时干涉测量系统。该系统以劈尖形液体容器构成的等厚干涉测量光路为基础,搭建了以CCD(charge coupled device)相机记录的共路干涉测量系统。以树莓派硬件系统为平台,Python语言为编程基础,通过傅里叶变换频谱分析和三次样条插值实现记录窗口内干涉条纹数的精确提取。设计了图形操作界面,实现了测量过程的动态可视,测量过程只需提前标定未注入液体时的初始干涉条纹数,无需额外预设参数即可实现流动液体折射率的实时测量。实验中分别测定了3种液体的折射率,并验证了测量系统的时间稳定性。结果表明,当初始干涉条纹数大于180条时,测量系统有较好的时间稳定性,且测量的相对误差均在0.754%以内。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
光学应用
光学应用 Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
1.00
自引率
0.00%
发文量
5894
期刊介绍: Journal of Applied Optics was founded in 1980, and its domestic and international publication numbers are ISSN 1002-2082 and CN-61-1171/O4. The journal is a technical journal sponsored by the China Ordnance Society and the 205th Institute of China Ordnance Industry. It was included in the "China Science and Technology Core Journal" in April 2006 and in the "Chinese Core Journal" in December 2008. It is included in the journals of important international retrieval institutions such as the American Chemical Abstracts (CA), Cambridge Scientific Abstracts (CSA), Russian Abstracts Journal (AJ), British Scientific Abstracts (INSPEC), Ulrich's Periodical Directory (UIPD), and Polish Index Copernicus (IC). The purpose of the journal is to track the research trends of high-tech at home and abroad, and comprehensively reflect the development status, research level, and application of optoelectronic technology at home and abroad; focus on optoelectronic application technology, advocate scientific research, be close to readers, and be close to enterprises, and focus on reporting new theories, new technologies and new methods, new products, and development trends in the field of optoelectronic technology at home and abroad. This journal solicits research papers on engineering optics, optical information acquisition and processing, optical metrology and detection, low-light-level night vision technology, fiber optic sensing technology, infrared application technology, laser application technology, optoelectronic devices, thin film optics, optical processes and equipment, and displays.
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