Patent ID: 7397173

Claim:
A lighting apparatus using microwave energy, comprising: a casing; a reflector fixed to an outer surface of the casing; a magnetron disposed inside the casing, for generating microwave energy; a waveguide for guiding microwave energy; a resonator disposed inside the reflector and providing a resonant region in which the microwave energy is resonated; a bulb having a stem disposed inside the resonator, and filled with a material which emits light, when excited by the microwave energy; a rear mirror formed in a hemispherical shape having a curved surface integrally fixed to the bulb stem and integrally rotatable together with the bulb when the bulb is rotated, for forwardly reflecting light rearwardly emitted from the bulb; and a fixed mirror formed in a hemispherical shape having a curved surface fixed to the casing at a rear side of the bulb and having a hole in which a bulb stem rearwardly extended from the bulb is rotatably insertable for forwardly reflecting light emitted to the rear of the bulb, wherein a diameter of the hole of the fixed mirror is formed to be smaller than a width of the rear mirror, and the center of the bulb is positioned at a focal point of both the curved surface of the rear mirror and the curved surface of the fixed mirror.