POLARIZING GLASS PLATE AND METHOD FOR MANUFACTURING SAME, POLARIZING GLASS PLATE SET FOR OPTICAL ISOLATOR, AND METHOD FOR MANUFACTURING OPTICAL ELEMENT FOR OPTICAL ISOLATOR

WIPO Patent Application WO/2015/198934

A1

　Provided is a method for easily manufacturing a polarizing glass plate in which polarizing axis misalignment is reduced. A method for manufacturing a polarizing glass plate in which stretched metal particles are dispersed in an aligned manner in a glass matrix, wherein the method for manufacturing a polarizing glass plate is characterized in including: a stretch-molding step for stretch-molding, while heating, a glass preform plate (1) having a prescribed width W0 and containing metal halide particles (4), and thereby obtaining a glass member (5) in which stretched metal halide particles (4') are dispersed in an aligned manner in a glass matrix; and a reduction step for performing a reduction process on the glass member (5) to reduce the stretched metal halide particles (4') and obtain a polarizing glass plate, the glass preform plate (1) being stretch-molded while being heated, in the stretch-molding step performed on the glass preform plate (1), such that the shape of the glass preform plate (1) during stretch-molding satisfies the following relationship (1). L1/W1 ≥ 1.0 …(1) L1 = length between portion (a) at which the width of the glass preform plate (1) has changed to 0.8 times the original width (W0) and portion (b) at which the width of the glass preform plate (1) has changed to 0.2 times the original width. W1 = length equivalent to 0.5 times the original width W0 of the glass preform plate (1).

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YABUUCHI KOUICHI (JP)
KAWAMURA TOMOAKI (JP)
TAKEUCHI HIROKAZU (JP)

PCT/JP2015/067419

December 30, 2015

June 17, 2015

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NIPPON ELECTRIC GLASS CO (JP)

G02B5/30; C03B23/037; C03C14/00; G02B27/28

WO2011122500A1

2011-10-06

JP2007193327A	2007-08-02
JP2006313343A	2006-11-16
JPH0980355A	1997-03-28
JP2001209008A	2001-08-03
JPH0714402U	1995-03-10

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