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Proceedings Paper

Research and development of VCSEL-based optical sensors in industrial applications
Author(s): Bo Su Chen; Phil Foster; Ron Warkentine
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Paper Abstract

Recently VCSEL technology has been emerging outside data communications. VCSEL's unique characteristics of low power consumption, high efficiency, circular beam spot, and low manufacturing cost make it a good candidate to replace LEDs or edge-emitting diode lasers in optical sensors. Optical sensors based on VCSEL technology in industrial applications have been studied in Honeywell. Traditional interruption type and Moire fringes type VCSEL sensors have demonstrated high resolution, simple design and lower cost in both transmission and reflection operation modes. Convergent and retroreflective VCSEL sensors were also studied. A safety circuit was added to control the VCSEL output power within the Class I laser limit. Other potential VCSEL sensors such as a VCSEL light curtain device, dual-beam linear encoder, dynamic Moire optical torque sensor would also be discussed in the presentation.

Paper Details

Date Published: 4 May 2001
PDF: 9 pages
Proc. SPIE 4286, Vertical-Cavity Surface-Emitting Lasers V, (4 May 2001); doi: 10.1117/12.424806
Show Author Affiliations
Bo Su Chen, Honeywell, Inc. (United States)
Phil Foster, Honeywell, Inc. (United States)
Ron Warkentine, Honeywell, Inc. (United States)

Published in SPIE Proceedings Vol. 4286:
Vertical-Cavity Surface-Emitting Lasers V
Kent D. Choquette; Chun Lei, Editor(s)

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