Method for manufacturing an anti-veiling-glare input window for

Details Method for manufacturing an anti-veiling-glare input window for Method for manufacturing an anti-veiling-glare input window for

1987-09-03

1991-12-24

Lindsay, Robert L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 31, 65 324, 65111, 65155, 313534, 427 64, 427 74, C03B 2900, H01J 4018

Patent

active

050748998

ABSTRACT:
Anti-veiling-glare glass input window for an optical device. The window has throughout a shallow surface layer over its peripheral surfaces radiation absorbent free-metal-induced color centers. A method for preparation of such a window, which is particularly suited to be used as an input window for an image intensifier, involves preshaping the window from a clear glass and forming color centers in a shallow surface layer over at least the peripheral surfaces of the window. If the clear glass contains reduceable metal oxides the color centers are formed by subjecting at least the peripheral surfaces of the clear glass to a reducing atmosphere at a temperature high enough to cause the reducing atmospheres reducing component to diffuse into a shallow surface layer of the window and to reduce the metal oxides to free metal atoms.

REFERENCES:
patent: 2498003 (1950-02-01), Peterson
patent: 2649387 (1953-08-01), Parsons et al.
patent: 3902880 (1975-09-01), Strack
patent: 3997312 (1976-12-01), Besselink
patent: 4065283 (1977-12-01), Asohara et al.
patent: 4475059 (1984-10-01), Sink
patent: 4613786 (1986-09-01), Holland et al.

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