Double laser diode speed sensor for contactless measures of moving targets

Xavier Raoul; Thierry M. Bosch; Noel Servagent

doi:10.1117/12.468179

22 May 2002 Double laser diode speed sensor for contactless measures of moving targets

Xavier Raoul, Thierry M. Bosch, Noel Servagent

Proceedings Volume 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2002) https://doi.org/10.1117/12.468179
Event: Fifth International Conference on Vibration Measurements by Laser Techniques, 2002, Ancona, Italy

Abstract

Our aim while developing a sensor exploiting spectral properties of optically disturbed laser diodes, was to introduce an alternative to already existing speed sensors. Production over assembly lines and other industrial applications can require contactless measurement of moving targets' velocity. Optical interferometry is already a possibility, but a sensor using Self-Mixing interferometry in a laser diode for industrial application can be an innovative solution. Optical feedback interferometry based sensors (with single laser diode or double laser diode architecture) propose low-cost and self-alignment. This paper presents two different architectures, the first one to validate theory and the other one to filter some perturbations we identified from the first set-up.

Citation Download Citation

Xavier Raoul, Thierry M. Bosch, and Noel Servagent "Double laser diode speed sensor for contactless measures of moving targets", Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); https://doi.org/10.1117/12.468179

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