Patent ID: 8174764

Claim:
A polarizing glass comprising anisotropically shaped metal particles oriented and dispersed in a glass substrate, wherein the glass substrate is a glass selected from the group consisting of silicate glass, borate glass, and borosilicate glass; the glass substrate contains at least one component selected from the group consisting of Y 2 O 3 , La 2 O 3 , V 2 O 5 , Ta 2 O 5 , WO 3 , and Nb 2 O 5 ; the content of each of the selected components ranges from 0.05 to 4 mole percent, or the total content of the components is 6 mole percent or less if a plurality of components are selected; and the Cl content in the glass substrate ranges from 0.47 to 0.58 wt % relative to the entire glass substrate.