Microwave electrodeless discharge lamp device

摘要

PPROBLEM TO BE SOLVED: To provide a microwave electrodeless discharge lamp device capable of alleviating degradation of a hollow structural member. PSOLUTION: The device is provided with a hollow resonator 3 equipped with a loop antenna 6 for guiding in microwaves generated by a microwave generating part 2 and restraining the microwaves from being discharged to an outside space, and a bulb 5 arranged in an inner space of the hollow resonator 3 and emitting light by the microwaves. The hollow resonator 3 is of semispherical members 33, 36 equipped with flanges 32, 35 made of a conductive material at an outer periphery of a hollow semispherical shape with the flanges 32, 35 jointed, and is provided with metal meshes 31, 34 transmitting visible light emitted from the bulb 5. An electromagnetic field mode of the microwaves in the inner space of the hollow resonator 3 is to be of a TM011 mode in a direction crossing the flanges 32, 35. PCOPYRIGHT: (C)2005,JPO&NCIPI