Share Email Print

Proceedings Paper

Multifunction wavelength-shift interferometry: absolute distance and velocity measurements
Author(s): Christophe Gorecki; A. Chebbour; Gilbert M. Tribillon
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

A dynamic interferometer for range finding with directional discrimination is proposed. It uses a laser diode which is tuned in frequency by the injection current with a triangular modulation function. Both the reference and the target signal beams from a Michelson interferometer are combined and coherently detected. The beat frequency is proportional to the optical path difference. When a target is moving, the beat frequency is different according to the upward current ramp or to the downward one, respectively. Consequently, two unknown parameters can be measured: absolute distance and velocity of the target. The technique enables the directional discrimination of the velocity and it doesn't need polarizing components or a spectrum analyzer widely used for such applications. A description of the device, experimental results, and main measuring error sources are presented and discussed.

Paper Details

Date Published: 12 December 1994
PDF: 10 pages
Proc. SPIE 2340, Interferometry '94: New Techniques and Analysis in Optical Measurements, (12 December 1994); doi: 10.1117/12.195932
Show Author Affiliations
Christophe Gorecki, Univ. de Franche-Comte (France)
A. Chebbour, Univ. de Franche-Comte (France)
Gilbert M. Tribillon, Univ. de Franche-Comte (France)

Published in SPIE Proceedings Vol. 2340:
Interferometry '94: New Techniques and Analysis in Optical Measurements
Malgorzata Kujawinska; Krzysztof Patorski, Editor(s)

© SPIE. Terms of Use
Back to Top