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  • Received: Aug. 22, 2002

    Accepted: --

    Posted: Mar. 1, 2003

    Published Online: Jun. 6, 2006

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    Shunzhong He, Xin Yao, Chengzhi Jiang, Jinfeng Liu, Yanyu Liu, Lincai Chen. Design of differential optical system of in-plane remote displacement measurement[J]. Chinese Optics Letters, 2003, 1(3): 03145

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Chinese Optics Letters, Vol. 1, Issue 3, 03145 (2003)

Design of differential optical system of in-plane remote displacement measurement

Shunzhong He, Xin Yao, Chengzhi Jiang, Jinfeng Liu, Yanyu Liu, and Lincai Chen

Author Affiliations

  • The National Key Lab of Precision Measuring and Testing Technique and Instrument, Tianjin University, Tianjin 300072

Abstract

In this paper, an optical system for in-plane remote displacement measurement is brought forward. The remarkable characteristic of this optical system is to use a big aperture lens to focus the waists of two Gauss beams on a scatter which have been expanded and collimated, so good laser Doppler signals and high measurement accuracy are achieved. The experiments prove that the measurement system consisting of this optical system, a lock-in amplifier and a digital filter can be used to measure the in-plane displacement of scatters in distance of 50 m with the relative accuracy of 1%.

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