Research and development of VCSEL-based optical sensors in industrial applications

Bo Su Chen; Phil Foster; Ron Warkentine

doi:10.1117/12.424806

4 May 2001 Research and development of VCSEL-based optical sensors in industrial applications

Bo Su Chen, Phil Foster, Ron Warkentine

Proceedings Volume 4286, Vertical-Cavity Surface-Emitting Lasers V; (2001) https://doi.org/10.1117/12.424806
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

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.

Citation Download Citation

Bo Su Chen, Phil Foster, and Ron Warkentine "Research and development of VCSEL-based optical sensors in industrial applications", Proc. SPIE 4286, Vertical-Cavity Surface-Emitting Lasers V, (4 May 2001); https://doi.org/10.1117/12.424806

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