Polarization recovery system using redirection

F - Mech Eng,Light,Heat,Weapons – 21 – V

Patent

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F21V 9/14 (2006.01) F21V 7/09 (2006.01) G02B 27/00 (2006.01) G02B 27/09 (2006.01) G02B 27/28 (2006.01)

Patent

CA 2515141

A polarization recovery system includes a polarizing beam splitter transmitting light of a useful polarization in an output direction and reflecting light of a non-useful polarization in a first orthogonal direction substantially orthogonal to the output direction. An initial reflector may reflect the non-useful polarization light in a second orthogonal direction substantially orthogonal to the output direction and the first orthogonal direction, and a final reflector may reflect the non-useful polarization light in the output direction. The non-useful polarization light may be rotated substantially to light of the useful polarization by the initial and final reflectors.

L'invention concerne un système de recyclage de polarisation qui comprend un diviseur de faisceau de polarisation qui transmet de la lumière de polarisation utile dans un sens de sortie et qui réfléchit de la lumière de polarisation inutile dans un premier sens perpendiculaire sensiblement perpendiculaire au sens de sortie. Un réflecteur initial peut réfléchir la lumière de polarisation inutile dans un deuxième sens perpendiculaire sensiblement perpendiculaire au sens de sortie et au premier sens perpendiculaire, et un réflecteur final peut réfléchir la lumière de polarisation inutile dans le sens de sortie. La lumière de polarisation inutile peut être sensiblement pivotée par rapport à la lumière de polarisation utile au moyen des réflecteurs initial et final.

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