G - Physics – 02 – B
Patent
G - Physics
02
B
96/219, 88/99
G02B 5/13 (2006.01) C03C 4/04 (2006.01) C03C 21/00 (2006.01) G02B 3/00 (2006.01) G02B 6/124 (2006.01) G02B 6/12 (2006.01)
Patent
CA 2025396
Abstract of the Disclosure This invention is directed to a method of forming optical devices composed of a photonucleable, crystalliz- able, lithium silicate glass body having at least one clear glass lens integral with and rising above at least one surface thereof, the lens being surrounded by a crystallized glass matrix, and optical devices produced by such method. The inventive method comprises subjecting the crystallized body to an ion exchange reaction wherein sodium and/or potassium ions from an external source are exchanged for lithium ions within the surface of the glass lens, the exchange reaction being conducted at a temperature of about 25°-125°C above the annealing point of the glass for a time sufficient to produce a lens having an axial height in excess of 100% greater than that of lenses produced solely by selectively crystallizing a photonucleable, lithium silicate glass body.
Borrelli Nicholas Francis
Smith Dennis Wayne
Corning Incorporated
Gowling Lafleur Henderson Llp
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