The research of original position optic measuring technique based on virtual Lock-in

HE Ling-Ping; bo chen

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The research of original position optic measuring technique based on virtual Lock-in

Article | 更新时间：2020-08-12

- The research of original position optic measuring technique based on virtual Lock-in
- Optics and Precision Engineering Vol. 16, Issue 9, Pages: 1677-1681(2008)
- 作者机构：
  
  长春光机所应光室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 November 2007，
  
  Revised：10 March 2008，
  
  Published Online：25 September 2008，
  
  Published：25 September 2008
- 稿件说明：
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何玲平,陈波. 基于虚拟锁相技术的原位光学测量技术研究[J]. 光学精密工程, 2008,16(9):1677-1681

HE Ling-Ping, bo chen. The research of original position optic measuring technique based on virtual Lock-in[J]. Optics and precision engineering, 2008, 16(9): 1677-1681.
何玲平,陈波. 基于虚拟锁相技术的原位光学测量技术研究[J]. 光学精密工程, 2008,16(9):1677-1681 DOI：

HE Ling-Ping, bo chen. The research of original position optic measuring technique based on virtual Lock-in[J]. Optics and precision engineering, 2008, 16(9): 1677-1681. DOI：

摘要

本文构建了一套基于虚拟锁相放大技术的、能准确测量微弱信号的高精度宽波段原位光学测量系统。介绍了该测量系统的建立目的，系统结构及原理；阐述了如何通过美国Ni公司的图形化编程语言Labview来虚拟实现锁相放大器功能，并应用于本套测量系统。这样既降低了成本，又简化了系统结构。测量了系统光源在200-2500nm的光强分布，测量了系统紫外可见部分及红外部分测量重复性，分别能达到0.12％、0.54％。最后利用该套系统测量了一块石英玻璃的透过率

并与lambda950的测量结果比较，两者测量结果平均相差0.95%。实验结果表明，使用了虚拟技术来实现锁相放大处理的该套原位光学测量系统的测量精度较高，对杂光和电气设备带来的噪声的抑制能力较强，能有效得对样品进行原位光学性能测量。

Abstract

This paper describes the build of a original position optic measuring system with high precision and wide scanning wavelength

which can measure feeble signal accurately buried in noise

based on virtual Lock-in technique. In this paper

we firstly introduce the aim

the structure

and the measuring principle of this system. Then we emphatically describe how to use the G language Labview to write a program to implement the virtual Lock-in technique

and how apply it in our system. This technique not only reduce the cost

but also simplify the structure of the system. After that we measured the distribution of lamp’ intensity between 200nm-2500nm; and measuring the repetition of wave band 200-860nm and wave band 860-2500nm.Finally we measure the transparence of a quartz glass

and compare with the measuring result of lambda950

the mean error is 0.95%. The results of experiment indicate that

this original position measuring system that use the virtual Lock-in technique to deal with the data

can measure well and truly

by restraining the noise brought by interferential light and electronic equipment. It is competent for original position measurement for specimens′optical character.

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