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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 23 — Aug. 10, 2012
  • pp: 5619–5626

Designing a laser scanning picoprojector. Part 2: laser-safety-related issues

Ian Wallhead, Roberto Ocaña, and Paula Quinzá  »View Author Affiliations


Applied Optics, Vol. 51, Issue 23, pp. 5619-5626 (2012)
http://dx.doi.org/10.1364/AO.51.005619


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Abstract

Laser scanning picoprojectors present a new challenge in the field of laser safety with methods of calculating accessible emission limits still in their infancy. We present a laser safety analysis and a calculation of an example picoprojector. We show that, due to its scanning operation, a picoprojector should be considered an extended laser source, and we also show that a picoprojector with two separate one-axis microelectromechanical systems mirrors offers a higher safe power limit than a projector with a single scanning mirror. Finally, a safety analysis is done under conditions of mirror failure. We show that, if the projector fails to scan in just one of the axes, the ocular hazard rises sharply, highlighting the need for a fail-safe system to be built into laser scanning picoprojectors.

© 2012 Optical Society of America

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(120.5800) Instrumentation, measurement, and metrology : Scanners
(140.3360) Lasers and laser optics : Laser safety and eye protection

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: March 15, 2012
Manuscript Accepted: April 13, 2012
Published: August 2, 2012

Virtual Issues
Vol. 7, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Ian Wallhead, Roberto Ocaña, and Paula Quinzá, "Designing a laser scanning picoprojector. Part 2: laser-safety-related issues," Appl. Opt. 51, 5619-5626 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-23-5619


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References

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