Real-time displacement measurement using synchronous detection in a sinusoidal phase modulating interferometer

Takamasa Suzuki; Osami Sasaki; Shuich Takayama; Takeo Maruyama

doi:10.1117/12.130252

1 May 1993 Real-time displacement measurement using synchronous detection in a sinusoidal phase modulating interferometer

Takamasa Suzuki, Osami Sasaki, Shuich Takayama, Takeo Maruyama

Author Affiliations +

Optical Engineering, Vol. 32, Issue 5, (May 1993). https://doi.org/10.1117/12.130252

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.

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Takamasa Suzuki, Osami Sasaki, Shuich Takayama, and Takeo Maruyama "Real-time displacement measurement using synchronous detection in a sinusoidal phase modulating interferometer," Optical Engineering 32(5), (1 May 1993). https://doi.org/10.1117/12.130252

Published: 1 May 1993

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