Method of making laser eyewear protection

Details Method of making laser eyewear protection Method of making laser eyewear protection

1994-11-07

1996-07-09

Czaja, Donald E.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3013, C03C 1500

Patent

active

055340415

ABSTRACT:
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 are produced. 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.

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