| 摘要 |
An irradiation device having a source of UV radiation and two filter screens mounted for movement toward and away from each other so as to fully or partly block the irradiation source. A time program device is provided so as to open and maintain the screen apart for a set period of time, which is constant for each irradiation period. The distance by which the screens are displaced is adjusted in accordance with the day of the radiation treatment. The device therefore operates with a constant irradiation time but variable radiation intensity.
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