Optical wheel, light source unit, and projector
AssigneeCasio Computer Co., Ltd.
InventorHideyuki Kurosaki
Life of this patent
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Abstract
An optical wheel according to the present invention includes a luminescent material light emitting area on which light in a first wavelength range is incident from one side to thereby emit luminescent light excited by the light in the first wavelength range from another side, and a controlling and diffusing optical area including a controlling section on which the light in the first wavelength range is incident from the one side and configured to cause a diffusing characteristic of the light in the first wavelength range to differ between in a radial direction and in a circumferential direction.
Claims13
An optical wheel comprising:
- a luminescent material light emitting area on which light in a first wavelength range is incident from one side to thereby emit luminescent light excited by the light in the first wavelength range from another side;
- and
- a controlling and diffusing optical area comprising a controlling section on which the light in the first wavelength range is incident from the one side and configured to cause a diffusing characteristic of the light in the first wavelength range to differ between in a radial direction and in a circumferential direction,
- wherein of the radial direction and the circumferential direction of the controlling section, a direction in which a spreading angle of the light in the first wavelength range is greater substantially coincides with a minor axis direction of an elliptic cross-sectional shape of the light in the first wavelength range.
Dependencies are inferred from the claim text.