The present invention concerns a polarizer for visible light, comprising a polyvinyl alcohol-based polarizing element wherein not less than 60% of dichromophore is iodine, and a protective film. The said polarizing element has at least three absorption bands in an ultraviolet region of 210 nm to 400...http://www.google.es/patents/US5087985?utm_source=gb-gplus-sharePatente US5087985 - Polarizer for visible light
