Patent ID: 6252708
Filing Date: 2001-06-26
Classification: B29D,G02B,G02F,Y10T

Abstract:
An optical isolator, comprising:a polarizer element adapted to polarize a beam of incident light to form an incident beam of polarized light;a magneto-optical element for rotating said incident beam of polarized light;an analyzer element adapted to transmit said incident beam of polarized light and to polarize back-reflected light to form a reflected beam of polarized light;a bimetallic element in mechanical communication with said analyzer element to rotate said analyzer element relative to said polarizer element in response to temperature variations;whereby, the rotation of said analyzer element substantially compensates for temperature induced changes in rotation of said reflected beam of polarized light which is transmitted through said magneto-optical element such that said back-reflected light incident on said polarizer element is substantially extinguished.