Modulation-amplitude-locked laser diode interferometry for distance measurement

Takamasa Suzuki; Tatsuo Iwana; Osami Sasaki

doi:10.1117/12.518640

26 February 2004 Modulation-amplitude-locked laser diode interferometry for distance measurement

Takamasa Suzuki, Tatsuo Iwana, Osami Sasaki

Proceedings Volume 5265, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology; (2004) https://doi.org/10.1117/12.518640
Event: Photonics Technologies for Robotics, Automation, and Manufacturing, 2003, Providence, RI, United States

Abstract

This paper describes a range-finder that uses two feedback loops. Each feedback loop is respectively used to control the phase and the modulation-amplitude in a sinusoidal phase-modulating interference signal. It enables us to perform unambiguous measurement and real-time processing on the interference signal. Also external disturbance superimposed on the interference signal is eliminated by the feedback control. A distributed-Bragg-reflector laser diode that has wide range in wavelength-tuning allows us to improve the measurement accuracy.

Citation Download Citation

Takamasa Suzuki, Tatsuo Iwana, and Osami Sasaki "Modulation-amplitude-locked laser diode interferometry for distance measurement", Proc. SPIE 5265, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology, (26 February 2004); https://doi.org/10.1117/12.518640

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