| 摘要 |
<p>A light irradiation device (500) comprising a high-pressure discharge lamp (100) having an arc tube (1) and a sealing unit (2), and a reflection mirror (50) for reflecting a light (111) emitted from the lamp (100), wherein the light (111) emitted from the lamp (100) has at least a ultraviolet-region spectrum, over 150 mg/cm3 of mercury, halogen and rare gas are sealed in the arc tube (1), and the tube-wall load of the lamp (100) is at least 80 w/cm2.</p> |
