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Proceedings Paper

Another look at saturable absorbers for laser eye protection
Author(s): David J. Lund; Peter R. Edsall; Jon D. Masso
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Paper Abstract

A number of approaches are being explored to provide eye protection against visible wavelength lasers while maintaining adequate transirtission for visual performance. Real protection at this time is provided by fixed wavelength reflectors and absorbers and if a plastic substrate is required only absorbers have been reliably produced. An absorber useful in the visible spectruit must have a very narrow absorption band centered at the appropriate laser wavelength with minimum attenuation outside that band. With such restrictions the choice of absorbers is liirited and many of the choices that do exist are saturable absorbers. A saturable absorber becomes increasingly transparent to an incident laser beam as the irradiance of that beam increases thus it would seem to be a poor choice for ocular protection. Nevertheless for some wavelengths saturable absorbers are the only absorbers available. We have performed some tests with a phthalocyanine dye in a plastic substrate to explore limits within which a saturable absorber can be used without comproruising eye safety. 1

Paper Details

Date Published: 1 July 1990
PDF: 9 pages
Proc. SPIE 1207, Laser Safety, Eyesafe Laser Systems, and Laser Eye Protection, (1 July 1990); doi: 10.1117/12.17837
Show Author Affiliations
David J. Lund, Letterman Army Institute of Research (United States)
Peter R. Edsall, Letterman Army Institute of Research (United States)
Jon D. Masso, American Optical Corp. (United States)

Published in SPIE Proceedings Vol. 1207:
Laser Safety, Eyesafe Laser Systems, and Laser Eye Protection
Penelope K. Bryan; David H. Sliney, Editor(s)

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