Optical device
AssigneeCitizen Watch Co., Ltd.
InventorSeiko Kato
Life of this patent
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Abstract
An optical device (100) includes laser light sources (111 to 113), polarization films (121 to 123), and a stacked wave plate (130). The laser light sources (111 to 113) respectively output light of a different wavelength. The stacked wave plate (130) includes multiple wave plates (131 to 133) and induces a phase difference on polarization components of transmitted light. The polarization films (121 to 123) adjust the polarization direction of the light such that an angle between polarization directions of the light emitted by the laser light sources (111 to 113) and input to the stacked wave plate (130) becomes an angle that corrects an orientation angle difference that occurs at the stacked wave plate (130), consequent to differences in the wavelength of the light.
Claims13
An optical device comprising:
- a plurality of light sources configured to respectively emit light of a different wavelength;
- a stacked wave plate that is configured by a plurality of wave plates disposed in series, transmits the light emitted by the plurality of light sources, and induces a phase difference on polarization components of the transmitted light;
- and
- a plurality of polarization adjusting units configured to receive light from a respective light source and to respectively adjust polarization directions of the light from said respective light source such that an angle between the polarization directions of the light emitted by the plurality of light sources and input to the same stacked wave plate becomes an angle that corrects an orientation angle difference that occurs at the stacked wave plate and is caused by differences in the wavelengths of the light.
Dependencies are inferred from the claim text.