Title:
SHORT-ARC HIGH-PRESSURE DISCHARGE LAMP
Document Type and Number:
WIPO Patent Application WO/2002/013229
Kind Code:
A1
Abstract:
A short-arc high-pressure discharge lamp in which input power is increased in order to increase the quantity of light radiated and the temperature of the electrode is lowered efficiently by improving the heat radiation characteristics of the electrode. The short-arc high-pressure discharge lamp (10) is characterized in that the lamp is provided, in an arc tube (11), with a set of electrodes (20, 30) having a groove (24) made at least in a part of the side face thereof and that the depth D of the groove (24) is within 12% of the diameter of the electrode and a relation W/P $m(G) 2 between the depth D and the pitch P of the groove (24) is satisfied.
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Inventors:
OKUBO KEISUKE (JP)
IKEUCHI MITSURU (JP)
MIYANAGA SHOJI (JP)
IKEUCHI MITSURU (JP)
MIYANAGA SHOJI (JP)
Application Number:
PCT/JP2001/006523
Publication Date:
February 14, 2002
Filing Date:
July 30, 2001
Export Citation:
Assignee:
USHIO ELECTRIC INC (JP)
OKUBO KEISUKE (JP)
IKEUCHI MITSURU (JP)
MIYANAGA SHOJI (JP)
OKUBO KEISUKE (JP)
IKEUCHI MITSURU (JP)
MIYANAGA SHOJI (JP)
International Classes:
H01J61/073; H01J61/86; (IPC1-7): H01J61/073
Domestic Patent References:
| WO1996002062A1 | 1996-01-25 |
Foreign References:
| GB2107921A | 1983-05-05 | |||
| JPS6048663U | 1985-04-05 | |||
| US3248591A | 1966-04-26 | |||
| JPS60110973U | 1985-07-27 | |||
| JP2000306546A | 2000-11-02 | |||
| JPH11102662A | 1999-04-13 | |||
| JPH11219683A | 1999-08-10 | |||
| GB2107921A | 1983-05-05 | |||
| JPS6048663U | 1985-04-05 |
Other References:
See also references of EP 1251548A4
Attorney, Agent or Firm:
Isohata, Masao c/o Ushiodenki kabushiki kaisya 19th Floor (Asahitokai Building 6-1 Otemachi 2-chome Chiyoda-ku, Tokyo, JP)
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