| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lamp unit capable of sufficiently raising vapor pressure in a glass bulb for efficient light emission, with no complexity in manufacturing process. <P>SOLUTION: A lamp unit 20 comprises a high pressure discharge lamp 21 consisting of a glass bulb 39 and first and second electrodes 45 and 47 of which one ends face each other in a light emitting part 33 while the other ends exist in first or second sealing part 35 or 37 of the glass bulb 39, and a sub-reflecting member 25 fitted to the second sealing part 37. The sub reflecting member 25 comprises a sub reflecting member body 77 where a reflecting surface 75 is formed and a tubular part 79 which extends in the illuminated direction from the central rear surface of the sub reflecting member body 77. In the tubular part 79, an edge 47a positioned in the second sealing part 37 of the second electrode 47 is present between the base end and the extending end, while the second sealing part 37 is inserted for play and at least a bonding agent is filled at the portion closest to the edge in the gap between the tubular part and the second sealing part, for fitting. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
