Patent ID: 7564190

Claim:
A light source device comprising: a waveguide formed to contain a medium enabling a microwave to resonate and formed to have a surface and an aperture cavity with an aperture opened at a predetermined position of the surface; an electrodeless lamp loaded in the aperture cavity in a state where part of the electrodeless lamp is protruded from the surface of the waveguide so that the part of the electrode lamp emits light in response to applying the microwave to the electrodeless lamp; a probe supplying a high-freciuency signal to the waveguide so that the high-freciuency signal is converted to the microwave in the waveguide; and converging means disposed on the surface of the waveguide to face the aperture cavity and formed to utilize, without leakage of light, the light emitted from the part of the electrodeless lamp so as to converge the light, wherein the converging means comprises a spherical reflecting mirror formed into a quaquaversal shape having a top, disposed on the surface of the waveguide to enclose the aperture cavity, and formed to have a semi-spherical reflecting surface to be opposed to the aperture cavity and an aperture formed at the top of the mirror, the reflecting surface providing a focus located at the part of the electrodeless lamp and the aperture of the mirror allowing the light emitted from the part of the electrodeless lamp to pass therethrough.