G - Physics – 02 – F
Patent
G - Physics
02
F
G02F 1/1335 (2006.01) G02F 1/133 (2006.01) G02F 1/135 (2006.01) G02F 1/141 (2006.01) G02F 1/13363 (2006.01)
Patent
CA 2055868
An optical modulating device comprises a polarizer, an analyzer and liquid crystals positioned between the polarizer and the analyzer. The device controls the birefringence of the liquid crystals by applying an electric field to the liquid crystals so as to change the polarization of light of the device. The device further comprises a rotatable halfwave plate which is positioned between the liquid crystals and the analyzer or between the liquid crystals and the polarizer in such a manner that the optical axis of the halfwave plate will be rotated around the optical axis of light coming into the optical modulating device. The device varies the rotational angle of the halfwave plate in accordance with the temperature of the liquid crystals or the environment thereof.
Mitsutake Hideaki
Shingaki Junko
Canon Kabushiki Kaisha
Ridout & Maybee Llp
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