| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp with good light emitting efficiency, enabled to form an uniform discharge light emission, and to provide a light irradiation device and a water processing device. SOLUTION: The electrodeless lamp 1 comprises a tube-shaped light emitting tube 2 in which, discharging medium is enclosed, an inductive coupling coil 3 formed so as to surround the light emitting tube 2, enabled to transmit discharging energy to the discharging medium, and a spacer 4 mainly made of non-conductive substance, formed between the light emitting tube 2 and the inductive coupling coil 3, so that the distance between the outer surface of the light emitting tube 2 and the inner surface of the induction coupling coil 3 keeps an almost constant distance of 1.5-10 mm, ranging whole peripheral part of the light emitting tube 2. |
