Glasses for laser protection

Details Glasses for laser protection Glasses for laser protection

1995-11-13

1998-03-17

Turner, Archene

Optical: systems and elements

Having significant infrared or ultraviolet property

Having ultraviolet absorbing or shielding property

359355, 359350, 501 32, 501 65, 501 66, 501 67, 501 69, 501 77, 428212, 428426, G02B 108

Patent

active

057293813

ABSTRACT:
This invention is directed to the production of cuprous halide- or a cuprous-cadmium halide-containing glass articles which are essentially completely opaque to ultraviolet radiation and can be essentially completely opaque to radiation within the region of wavelengths of up to 550 nm, but are transparent to visible radiations having a wavelength longer than the radiation within the region of opacity. The method involves exposing the glass articles to a hydrogen gas-containing atmosphere at a temperature between about 375.degree.-500.degree. C. for a period of at least 18 hours to develop an integral reduced layer in at least one surface of the article having a depth effective to prevent the transmission of ultraviolet radiation and radiation having a wavelength up to 550 nm through the article.

REFERENCES:
patent: 4155735 (1979-05-01), Ernsberger
patent: 4240836 (1980-12-01), Borrelli et al.
patent: 4253861 (1981-03-01), Graft et al.
patent: 4979976 (1990-12-01), Havens et al.
patent: 5281562 (1994-01-01), Araujo et al.
patent: 5322819 (1994-06-01), Araujo et al.
patent: 5430573 (1995-07-01), Araujo et al.
patent: 5625427 (1997-04-01), Araujo et al.

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