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Proceedings Paper

Laser diode backscatter modulation for machine vision
Author(s): Peter J. de Groot; Gregg M. Gallatin
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Paper Abstract

Weak optical feedback from diffusely-reflecting targets modulates the power and emission spectrum of laser diodes. The modulation is a coherent phenomenon independent of background light and requiring very little power. The practical applications of the backscatter modulation of laser diodes is considered in the context of machine vision. It is shown that interferometry, velocimetry, absolute ranging, and position sensing can be performed with a minimum of hardware. Both high precision (submicron) and long range (50 m) systems are described.

Paper Details

Date Published: 1 October 1990
PDF: 10 pages
Proc. SPIE 1375, ICALEO '89: Optical Sensing and Measurement, (1 October 1990); doi: 10.1117/12.35028
Show Author Affiliations
Peter J. de Groot, Electro-Optics Technology Div. (United States)
Gregg M. Gallatin, Perkin-Elmer Corp. (United States)


Published in SPIE Proceedings Vol. 1375:
ICALEO '89: Optical Sensing and Measurement

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