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Optical Engineering

Real-time displacement measurement using synchronous detection in a sinusoidal phase modulating interferometer
Author(s): Takamasa Suzuki; Osami Sasaki; Shuich Takayama; Takeo Maruyama
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Paper Abstract

A real-time displacement measurement system using a sinusoidal phase modulating interferometer is proposed and demonstrated. The system utilizes the frequency components of the interference signal to detect the desired phase or the displacement in real time. The real-time phase detector is constructed with simple electronic circuits. The system also has a feedback loop to eliminate external disturbance. It is easy to measure the relatively large displacement that exceeds a half wavelength of the light because the compensation circuit is incorporated into the system to obtain continuous phase outside the region from 0 to 2π.

Paper Details

Date Published: 1 May 1993
PDF: 5 pages
Opt. Eng. 32(5) doi: 10.1117/12.130252
Published in: Optical Engineering Volume 32, Issue 5
Show Author Affiliations
Takamasa Suzuki, Niigata Univ. (Japan)
Osami Sasaki, Niigata Univ. (Japan)
Shuich Takayama
Takeo Maruyama, Niigata Univ. (Japan)


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