Patent Number: 6,167,727

Title: Process for the production of polarizing glass

Abstract: A process for producing a polarizing glass containing shape-anisotropic metallic particles dispersed in an oriented state therein, which comprises drawing a glass preform containing metallic halide particles dispersed therein while its viscosity being held above 2.times.10.sup.6, but below 7.times.10.sub.7 poises; and subjecting the drawn glass to a reducing treatment so that a part or all of the metallic halide particles are reduced to metallic particles, which process enables it to produce a polarizing glass with a high yield from a starting material of a glass containing metallic halide particles, while avoiding glass breakage or fracture during elongation as well as preventing the elongated metallic halide particles from returning to a spherical shape.

Inventors: Tajima; Hidemi (Tokyo, JP), Takahashi; Takeshi (Yamanashi, JP), Miyashita; Yukari (Tokyo, JP), Matsuoka; Yoshihiko (Tokyo, JP)

Assignee: Hoya Corporation

International Classification: C03B 32/00 (20060101); C03B 37/027 (20060101); C03B 23/02 (20060101); C03B 23/037 (20060101); C03B 23/00 (20060101); C03B 23/047 (20060101); C03B 37/075 (20060101); C03C 14/00 (20060101); C03B 37/02 (20060101); C03C 4/00 (20060101); C03B 023/037 (); C03C 023/00 ()

Expiration Date: 01/02/2018