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Title:
GLASS POLARIZING ELEMENT AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2011059593
Kind Code:
A
Abstract:

To provide a glass polarizing element which allows prevention or reduction of cracks due to tensile stress mainly caused by a drawing step with a large tension, and a manufacturing method thereof.

The manufacturing method of the glass polarizing element includes: a melting step of dissolving glass containing silver ions and chlorine ions; a silver chloride deposition step of depositing a silver chloride in molten glass; a preform forming step of processing the glass into a desired size; a drawing step of heating a preform and drawing silver chloride particles in a uniaxial direction to form a glass sheet; a strengthening step of forming a compressive stress layer on a surface of the glass sheet; and a reduction step of reducing the drawn silver chloride particles in the glass sheet.


Inventors:
TAKESHIMA NOBUHITO
KIKUCHI MASAYUKI
IKEDA KAZUMASA
HIRANO TAKAMICHI
Application Number:
JP2009212047A
Publication Date:
March 24, 2011
Filing Date:
September 14, 2009
Export Citation:
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Assignee:
OKAMOTO GLASS CO LTD
International Classes:
G02B5/30; G02B27/28; G03B21/00; G03B21/14
Domestic Patent References:
JP2007302505A2007-11-22
JP2005047734A2005-02-24
JPH0986956A1997-03-31
JPS5983951A1984-05-15
JPH01261240A1989-10-18
Foreign References:
WO2008072368A12008-06-19
Attorney, Agent or Firm:
Yuji Iizuka