1 July 1990 The year's progress in tristimulus laser goggles
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Abstract
The tristimulus optical interference filter announced last year at the Orlando SPIE Symposium on Aerospace Sensing has been improved by increasing the light transmission in the three passbands and by the addition of an absorptive dye toblock the " blue shift^" of interference filters. Work is in progress to develop comfortable polycarbonate eyewear in place of the bulky prototype goggles. TEXT There is a need to provide eye protection to laboratory personnel at risk from a variety of laser beams and we have demonstrateda unique approach: an optical filter that blocks the entire visible spectrum except for three very narrow passbands - one in the red one in the green and one in the blue. This filter blocks all popular laser wavelengths yet vision through it is bright and clear - and in full natural color. The transmission spectrum is shown in Figure 1. The initial work was reported at the SPIE Technical Symposium on Aerospace Sensing in Orlando 27-31 March 1989 and a prototype goggle was shown there. This filter was originally conceived by Dr. W. A. Thornton and me in late 1987. The basic idea was not new with us it has been known since at least 1860 and is used in the picture tube of every color television set in the world. What was new was the idea''s embodiment in a practical optical filter that could be incorporated
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John A. Brown, John A. Brown, } "The year's progress in tristimulus laser goggles", Proc. SPIE 1207, Laser Safety, Eyesafe Laser Systems, and Laser Eye Protection, (1 July 1990); doi: 10.1117/12.17839; https://doi.org/10.1117/12.17839
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