| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a structure capable of obtaining an enough light output through restraint of absorption of ultraviolet rays at a lower half part of a lamp, in a light source device and a light irradiation device including a discharge lamp driven by alternating current and a concave reflecting mirror into which the discharge lamp is assembled, and arranged so as a center axis of the discharge lamp and a light axis direction of the concave reflecting mirror to be in agreement. <P>SOLUTION: An opening of the concave reflecting mirror is arranged directed upward, and time for a lower electrode of a pair of electrodes to perform an anode operation is to be set longer than time for an upper electrode to perform an anode operation. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
