Title:
METAL HALIDE LAMP EQUIPPED WITH REFLECTING MIRROR
Document Type and Number:
Japanese Patent JP3184404
Kind Code:
B2
Abstract:
PURPOSE: To provide a metal halide lamp equipped with a reflecting mirror capable of increasing converging efficiency by effectively utilizing a light emitted from a light emitting tube.
CONSTITUTION: A pair of electrodes 2a and 2b made of tungsten are provided inside a light emitting tube 1 made of quartz glass. Xenon gas serving as starting gas is enclosed into the light emitting tube 1 together with specified amounts of mercury, dysprosium iodide neodymium iodide and cesium iodide. Sealing parts 3a and 3b are provided on both ends of the light emitting tube 1. A heat holding film 8 made of zirconia is formed on the outer surface in the vicinity of the electrode 2a and 2b of the light emitting tube 1. The light emitting tube 1 is provided inside a hard glass reflecting mirror 9 which is the first reflecting mirror by aligning the axis of the light emitting tube 1 with that of a reflecting mirror 9. An aluminum reflecting mirror 15 which is the second reflecting mirror having a thickness of 1mm is fixed to the sealing part 3a on the light projecting side of the light emitting tube 1 by means of cement 16.
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Inventors:
Yoshiki Kitahara
Toshiyuki Shimizu
Yuriko Kaneko
Toshiyuki Shimizu
Yuriko Kaneko
Application Number:
JP16119394A
Publication Date:
July 09, 2001
Filing Date:
July 13, 1994
Export Citation:
Assignee:
Matsushita Electronics Industrial Co., Ltd.
International Classes:
H01J61/52; F21S2/00; F21V13/00; G03B21/14; H01J61/35; H01J61/88; (IPC1-7): H01J61/88; F21S2/00
Domestic Patent References:
| JP6427802U |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)