Electric lamp and discharge devices – With gas or vapor – With particular gas or vapor
Patent
1994-07-29
1996-07-30
Horabik, Michael
Electric lamp and discharge devices
With gas or vapor
With particular gas or vapor
313637, 313643, H01J 6118
Patent
active
055414818
ABSTRACT:
A cadmium rare gas discharge lamp of the short arc type that has a high power of the spectra in a wavelength range of 210 nm to 230 nm and a stable lamp voltage in lighting operation for a long period. An arc tube 1 is provided within which are disposed opposed, spaced apart electrodes 2, 3 and thermal insulation films 6, 7. A rare gas is encapsulated together with metal cadmium and a quartz glass is used for the material of the arc tube whose OH radical has a weight content of no more than 200 ppm. Electrodes 4 and 5 are spaced apart no more than 10 mm, so that with a lamp current at least 20 amperes, an arc of the electrode-stable type is formed and radiant light of Cd ions obtained. For the encapsulated rare gas, in one embodiment at least one of the rare gases neon, argon or krypton, are used and are encapsulated at a gas pressure of 35 kPa to 2.5 MPa at a standard temperature of 25.degree. C. The arc tube 1 is formed of quartz glass, electrodes 2 and 3 are placed opposite one another. In another embodiment, a halogen gas is encapsulated in the arc to in an amount from 4.5.times.10.sup.-10 mol/cm.sup.3 of arc tube volume to 2.1.times.10.sup.-7 mol/cm.sup.3 of are tube volume.
REFERENCES:
patent: 2707247 (1955-04-01), Anderson, Jr.
patent: 4156826 (1979-05-01), Hernquist
patent: 4439711 (1984-03-01), Murakami et al.
patent: 4701664 (1987-10-01), Larve et al.
patent: 4884009 (1989-11-01), Rothwell, Jr. et al.
Igarashi Tatsushi
Matsuno Hiromitsu
Yamaguchi Akiyasu
Yasuda Yukio
Day Michael
Horabik Michael
Safran David S.
Ushiodenki Kabushiki Kaisha
LandOfFree
Cadmium ARC lamp with improved UV emission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cadmium ARC lamp with improved UV emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cadmium ARC lamp with improved UV emission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1661697