Title:
DISCHARGE LAMP AND ULTRAVIOLET IRRADIATION SYSTEM AND OPERATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2002/103749
Kind Code:
A1
Abstract:
A discharge lamp which comprises a glass tube (11) consisting of synthetic quartz glass and having an inner diameter of at least 8 mm, and a pair of filaments (21a, 21b) disposed L (cm) apart at the opposite ends of this glass tube, and which has rare gas and metal including at least mercury sealed thereinside, wherein a voltage V (V) at lighting of the lamp, a lamp current I (A), an inter−filament distance L (cm) and an inner diameter of a discharge path D (mm) satisfy the following relational expressions: (V − Vf)&sol L = X&sol (Ö D× Ö I) and 2.6 ≤ X ≤ 4.2, where Vf is a lighting−power−supply−dependent constant factor, and Vf = 10 at lighting from a high−frequency power supply of at least 1 kHZ and Vf = 50 at lighting from power supply of less than 1 kHZ.
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Inventors:
Nakano, Koji c/o PHOTOSCIENCE JAPAN CORPORATION 5-8-3 (Sanda-cho Hachioji-shi, Tokyo, 193-0832, JP)
Application Number:
PCT/JP2002/005549
Publication Date:
December 27, 2002
Filing Date:
June 05, 2002
Export Citation:
Assignee:
PHOTOSCIENCE JAPAN CORPORATION (5-8-3, Sanda-cho Hachioji-shi, Tokyo, 193-0832, JP)
International Classes:
G21K5/00; A61L2/10; B01J19/12; C02F1/32; G01J1/00; G21G4/00; H01J17/00; H01J17/16; H01J61/00; H01J61/02; H01J61/72; (IPC1-7): H01J61/72
Attorney, Agent or Firm:
Iizuka, Yoshihito (Hongo-Ohara Building Fifth Floor 24-6, Hongo 5-chome Bunkyo-ku, Tokyo, 113-0033, JP)
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