Patent ID: 8570653

Claim:
A polarizing glass comprising: a glass substrate; and anisotropically shaped metal particles oriented and dispersed in the glass substrate; wherein the glass substrate comprises a silicate glass, a borate glass, or a borosilicate glass; wherein the glass substrate comprises a first component comprising at least one of Y 2 O 3 , La 2 O 3 , V 2 O 5 , Ta 2 O 5 , WO 3 , and Nb 2 O 5 , and a content of each species comprised in the first component ranges from 0.05 to 4 mole percent, or a total content of the first component is 6 mole percent or less if more than one of the species are comprised in the first component; wherein a Cl content in the glass substrate ranges from 0.47 to 0.58 wt % based on a total weight of the glass substrate; wherein the anisotropically shaped metal particles comprise anisotropically shaped copper particles; and wherein the glass substrate comprises, in terms of wt % relative to the entire glass substrate: SiO 2 : 55-63 B 2 O 3 : 16-22, Al 2 O 3 : 7-10, alkali metal oxide: 8-12, alkali earth metal oxide: 0-3, copper oxide: 0.3-1.0, SnO: 0-0.3, As 2 O 3 : 0-3, and F: 0.5-1.0.