Method for providing porous broad-band antireflective surface la

Details Method for providing porous broad-band antireflective surface la Method for providing porous broad-band antireflective surface la

1976-01-22

1977-04-26

Bashore, S. Leon

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 31, 156 663, C03C 1500

Patent

active

040198847

ABSTRACT:
A method for providing broad-band antireflective surface layers on a chemically durable borosilicate glass which comprises phase-separating the glass by heat treatment at 630.degree.-660.degree. C., removing a siliceous surface layer from the glass, and treating the glass in an aqueous solution containing both H.sup.+ ions and F.sup.- ions for a time sufficient to produce the antireflective surface layer, is described. Antireflective surface layers exhibiting reflectances as low as 0.5% throughout the wavelength range from about 0.4-2.0 microns have been produced.

REFERENCES:
patent: 2348704 (1944-05-01), Adams
patent: 3374130 (1968-03-01), Junge et al.
patent: 3551228 (1970-10-01), Meth
patent: 3616098 (1971-10-01), Falls
patent: 3647583 (1972-03-01), De Rouw
patent: 3785793 (1974-11-01), Park
patent: 3938974 (1976-02-01), Macedo et al.

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