Patent ID: 9648718
Date: 2017-05-09
CPC Classifications: H01J,H05H

Claim:
1. A plasma emission device, comprising: an electromagnetic wave generator; a power source unit supplying power to the electromagnetic wave generator; a waveguide transmitting an electromagnetic wave emitted from the electromagnetic wave generator; an antenna receiving the electromagnetic wave transmitted through the waveguide; an electromagnetic wave focuser which is irradiated with the electromagnetic wave from the antenna; and a light emitting unit having an electrodeless bulb disposed in the electromagnetic wave focuser and filled with a light-emitting material therein, the electrodeless bulb plasma-emitting by the electromagnetic wave being focused by the electromagnetic wave focuser to excite the light-emitting material, wherein the electromagnetic wave generator comprises a cathode part and an anode part surrounding the cathode part, and a maximum output efficiency of the electromagnetic wave to be generated with an input power of 700 W or less in the electromagnetic wave generator is 70% or more, and wherein the electromagnetic wave generator generates the electromagnetic wave in an anode current region of 200 mA or less with respect to the input power, and a maximum output efficiency of the electromagnetic wave in the anode current region is 70% or more.