| 摘要 |
PURPOSE:To provide a light irradiator by which the emission of light from a non-electrode light emission tube can be monitored with a stable sensitivity, by detecting the change in the temperature of an irradiated object which is caused by the absorption of microwaves leaking from the tube. CONSTITUTION:When a non-electrode light emission tube 33 almost completely absorbs microwaves emitted from an electroconductive antenna 34 and properly emits ultraviolet light, the temperature of irradiated sewage 36 in a disposal tank 35 does not change. When the absorption of the microwaves decreases due to the abnormality of the light emission tube 33, the microwaves leak out of the tube and are all absorbed by the sewage 36 so that its temperature rises. If the change in the temperature is out of a prescribed range, a calculator 12 finds out the leak of a large quantity of microwaves, and sends out the result of calculation to a display unit 13 so that the unit shows 'Light emission tube abnormal' or the like. |
