Patent ID: 6089042
Filing Date: 2000-07-18
Classification: C03C,G02B

Abstract:
A method of forming glass having polarizing and non-polarizing regions integral thereto, the method comprising the steps of:a) providing a phase-separable glass containing a metal halide reducible phase selected from the group consisting of copper halide and cadmium halide;b) elongating the glass under stress to elongate and align the metal halide phase in the direction of the stress;c) applying in the form of glass/frit mixture, a protective material to the surface of the glass to form a pattern of protected and unprotected regions, said protective material being capable of blocking a reducing gas;d) subjecting the glass to a reducing gas atmosphere to reduce the reducible elongated metal halide phase in the unprotected regions of the glass and thereby render the glass in said regions polarizing; and(e) removing the protective material from the glass to reveal underlying non-polarizing glass.