| 摘要 |
<p>There is provided a light diffusing structure that diffuses ultraviolet rays, emitted by an ultraviolet ray discharge lamp (50), to irradiate a to-be-treated substance with the thus-diffused ultraviolet rays, so as to lessen unevenness in luminance of the rays. The light diffusing structure is provided by forming a generally while-colored thin film (11) on the inner surface of a light emitting tube (10) or minute irregularities on the inner or outer surface of the light emitting tube (10), or by forming a light-transmissive outer tube (protective tube) (60), accommodating therein the discharge lamp (50), of a translucent (diffusion-permeable) material. Such arrangements achieve enhanced sterilizing/purifying capabilities commensurate with amounts of ultraviolet ray irradiation by a high-density ultraviolet ray light source and can thereby perform efficient treatment. <IMAGE></p> |
