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Optical Engineering

Real-time range finder based on phase- and modulation-amplitude-locked laser diode interferometry
Author(s): Takamasa Suzuki; Tatsuo Iwana; Osami Sasaki
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Paper Abstract

An interferometric range finder that uses both phase-locked and modulation-amplitude-locked techniques in a sinusoidal phase-modulating interference signal is described. It allows us to perform unambiguous and real-time distance measurement. Also, external disturbance superimposed on the interference signal is eliminated by the feedback control. Our preliminary experiments indicate a measurement error of 17.7 μm rms.

Paper Details

Date Published: 1 November 2004
PDF: 5 pages
Opt. Eng. 43(11) doi: 10.1117/1.1799071
Published in: Optical Engineering Volume 43, Issue 11
Show Author Affiliations
Takamasa Suzuki, Niigata Univ. (Japan)
Tatsuo Iwana, Niigata Univ. (Japan)
Osami Sasaki, Niigata Univ. (Japan)

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