Method for making polarizing glasses by extrusion

Details Method for making polarizing glasses by extrusion Method for making polarizing glasses by extrusion

1980-04-28

1981-12-08

Fisher, Richard V.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 32, 65 64, 106DIG6, 501 13, 501 77, 501 56, C03B 1700, C03B 1900, C03B 3200

Patent

active

043045847

ABSTRACT:
The instant invention is directed to the production of highly polarizing glasses, i.e., the glasses exhibit dichroic ratios up to 40 and higher, from silver-containing glasses that are characterized as being phase separable or, more preferably, as being photochromic because of the presence of silver halide particles therein, i.e., particles selected from the group of AgCl, AgBr, and AgI. The inventive method contemplates two general steps:

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patent: 3548060 (1970-12-01), Suzuki et al.
patent: 3653863 (1972-04-01), Araujo et al.
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patent: 3957498 (1976-05-01), Reade
patent: 4118214 (1978-10-01), Wedding
patent: 4125405 (1978-11-01), Araujo et al.
patent: 4190451 (1980-02-01), Hares et al.
patent: 4240836 (1980-12-01), Borrelli et al.

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