Laser eyewear protection
AssigneeCorning Incorporated
InventorsThomas G. Havens, David J. Kerko, JoAnn Morrell
Life of this patent
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Abstract
This invention is directed to the production of glass articles transparent to visible radiation, but opaque to ultraviolet radiation, rendering them particularly suitable for protecting the wearer of such lenses from exposure to laser radiation in the ultraviolet regions of the electromagnetic spectrum. The method involves exposing silver halide-containing glass articles to flowing hydrogen in a heat chamber operating at 375.degree.-500.degree. C. for at least four hours to produce an integral reduced layer in at least one surface of the articles of sufficient depth to prevent the transmission of ultraviolet radiation through the articles.
Claims10
A shield for laser radiation comprising a R.sub.2 O--B.sub.2 O.sub.3 --Al.sub.2 O.sub.3 --SiO.sub.2 glass article containing a silver halide, the shield being essentially opaque to ultraviolet radiation and to radiation ranging in wavelength up to 550 nm, but is transparent to visible radiation having a wavelength longer than the radiation within the region of opacity, said article having at least an exposed front surface having an integral reduced layer therein, the depth of that layer being sufficient to effectively prevent the transmission therethrough of ultraviolet radiation and radiation ranging in wavelength up to 550 nm.
Dependencies are inferred from the claim text.