Optical switch and color selection assembly

Details Optical switch and color selection assembly Optical switch and color selection assembly

G - Physics

02

F

345/56, 345/59

G02F 1/13 (2006.01) G02B 5/30 (2006.01) G02F 1/1347 (2006.01) G02F 1/1335 (2006.01)

Patent

CA 2024163

ABSTRACT An apparatus and method for providing optical switching or color selection capability uses cholesteric liquid crystals which reflect and transmit circularly polarized light and a variable wave retarder element together with phase reversing mirrors which recapture and recombine the reflected circularly polarized light. With the retarder element in a first state, first orientation circularly polarized light is completely transmitted and second orientation circularly polarized light is redirected Alternatively, a color selection assembly is provided through the use of a combination of cholesteric light crystals in which light of a first color is given a first polarization orientation and light of a second color is given a second polarization orientation. Depending upon the state of the retarder either the first or second color is transmitted to a desired target.

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