Title:
超高圧水銀ランプ及び該超高圧水銀ランプの製造方法
Document Type and Number:
Japanese Patent JP5056903
Kind Code:
B2
Abstract:
A lighting mode of an extra-high pressure mercury lamp can be switched between a steady lighting mode and a low electric power lighting mode. A temperature maintaining portion that absorbs light emitted from a light emission section is provided in a vicinity of a boundary between a sealing portion and a light emission section in an outer circumference direction of the lamp. The temperature maintaining portion is made of a material having thermal expansion coefficient that is greater than a material that forms the light emission section. The temperature maintaining portion comes in contact with the light emission section in the low electric power lighting mode. In the steady lighting mode, a gap is formed between the temperature maintaining portion and the light emission section so that the temperature maintaining portion is separated from the light emission section.
Inventors:
Hirohisa Iwabayashi
Application Number:
JP2010127812A
Publication Date:
October 24, 2012
Filing Date:
June 03, 2010
Export Citation:
Assignee:
Ushio, Inc.
International Classes:
H01J61/35
Domestic Patent References:
| JP2004031153A | ||||
| JP2005522818A | ||||
| JP2009104839A | ||||
| JP2008251391A |
Attorney, Agent or Firm:
Koji Shichijo