H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 61/42 (2006.01) C03C 3/06 (2006.01) C03C 4/08 (2006.01) C09K 11/77 (2006.01) H01J 61/30 (2006.01) H01J 61/40 (2006.01)
Patent
CA 2149953
To inhibit, or at least sharply attenuate, fluorescence of a quartz-glass envelope (10) surrounding a light source (11), such as a halogen incandescent lamp, a high-pressure discharge lamp, or the like, when the quartz glass is subjected to ultraviolet (UV) radiation from the light source, and has been doped with a UV radiation absorbing material, typically a cerium, or cerium- titanium doping, the quartz-glass envelope is additionally doped with praseodymium or a praseodymium compound, such as praseodymium oxide or praseodymium aluminate. The pure praseodymium in the doping is, preferably, present in quantities of between about 0.008 and 1.25%, by weight, with reference to the undoped quartz glass. Barium metaborate can also be used, preferably together with praseodymium to attenuate the fluorescence. Preferably, the praseodymium is used as a combined doping with cerium, in form of a cerium-praseodymium aluminate, added to the starting material for the quartz glass, and before the quartz glass is fused from quartz sand or pulverized quartz crystal.
Deisenhofer Manfred
Meiss Dieter
Messner Ekkehard
Fetherstonhaugh & Co.
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
LandOfFree
Electric lamp having a fluorescence-suppressed quartz-glass... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric lamp having a fluorescence-suppressed quartz-glass..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric lamp having a fluorescence-suppressed quartz-glass... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1700765