Light source device and projector
AssigneeSeiko Epson Corporation
InventorsYutaka Takada, Hiroyuki Moteki
Life of this patent
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Abstract
A light source device includes a microwave generating section for generating a microwave, a reflector connected to the microwave generating section, and a microwave electrodeless lamp disposed inside a cavity, the cavity including the reflector and a metallic chamber covering an opening section of the reflector. The chamber includes a tube member having an opening section for communicating the inside and the outside of the cavity to lead a light flux out of the chamber, and a bore diameter, D of the opening section, a length L of the tube member, a wavelength λ of the microwave, and a wavelength Λ of the light flux satisfy Λ<D≦(¼)λ, L≧(¼)λ, and D+L=(½)λ.
Claims7
A light source device comprising:
- a microwave generating section for generating a microwave;
- a reflector connected to the microwave generating section;
- and
- a microwave electrodeless lamp disposed inside a cavity, the cavity including the reflector and a metallic chamber covering an opening section of the reflector,
- wherein the chamber includes a tube member having an opening section for communicating the inside and the outside of the cavity to lead a light flux out of the chamber, and
- a bore diameter D of the opening section, a length L of the tube member, a wavelength λ of the microwave, and a wavelength Λ of the light flux satisfy Λ<D≦(¼)λ, L≧(¼)λ, and D+L=(½)λ.
A projector comprising:
- a light source device including
- a microwave generating section for generating a microwave,
- a reflector connected to the microwave generating section, and
- a microwave electrodeless lamp disposed inside a cavity, the cavity including the reflector and a chamber covering an opening section of the reflector,
- the chamber including a tube member having an opening section for communicating the inside and the outside of the cavity to lead a light flux out of the chamber, and
- a bore diameter D of the opening section, a length L of the tube member, a wavelength λ of the microwave, and a wavelength Λ of the light flux satisfying Λ<D≦(¼)Λ, L≧(¼)λ, and D+L=(½)λ;
- an optical modulation section for modulating light flux emitted from the light source device in accordance with input image information to form an optical image;
- and
- a projection section for projecting the optical image formed by the optical modulation section.
Dependencies are inferred from the claim text.