Infrared broadband dichroic glass polarizer

Details Infrared broadband dichroic glass polarizer Infrared broadband dichroic glass polarizer

2005-05-03

2005-05-03

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S032000, C501S056000, C501S066000, C501S077000

Reexamination Certificate

active

06887808

ABSTRACT:
Polarized glass articles having a wavelength range that is broadened for high contrast-ratio applications. A method that imparts to a glass article a high contrast ratio of at least 40 dB for use as dichroic glass polarizers over a wavelength range of 880 nm to 1,690 nm while keeping a high transmission value. The method comprises the step of heating the glass article at a temperature ranging from 400 to 450° C. in a reducing atmosphere for a period of time ranging from 12 to 30 hours. Preferably, the reducing atmosphere is hydrogen at atmospheric pressure.

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patent: 20020053221 (2002-05-01), Grossman et al.
patent: 5-208844 (1993-08-01), None
patent: WO9824624 (1998-06-01), None

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