LOW-PRESSURE MERCURY VAPOR DISCHARGE LAMP

Low-pressure mercury vapor discharge lamp has an at least partly substantially cylindrical discharge vessel ( 10 ) with a length Ldv and with an internal diameter Din. The discharge vessel ( 10 ) encloses, in a gastight manner, a discharge space ( 13 ) provided with a inert gas mixture and with merc...

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Bibliographic Details
Main Authors VAN DER POL, ADRIANUS, J., H., P, GEERDINCK, LEONIE, M, DE BEER, ESTHER
Format Patent
LanguageEnglish
French
German
Published 28.09.2005
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS
CHEMISTRY
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
GLASS
JOINING GLASS TO GLASS OR OTHER MATERIALS
METALLURGY
MINERAL OR SLAG WOOL
SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS
SURFACE TREATMENT OF GLASS
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Summary:Low-pressure mercury vapor discharge lamp has an at least partly substantially cylindrical discharge vessel ( 10 ) with a length Ldv and with an internal diameter Din. The discharge vessel ( 10 ) encloses, in a gastight manner, a discharge space ( 13 ) provided with a inert gas mixture and with mercury. The discharge vessel ( 10 ) comprises discharge means (electrodes 20 a; 20 b) for maintaining a discharge in the discharge space ( 13 ). According to the invention, the ratio of the weight of mercury mHg in the discharge vessel ( 10 ) to the product of the internal diameter Din and the length of the discharge vessel Ldv is given by the relation: Formula (I), wherein C<=0.01 muG/MM2. Preferably, 0.0005<=C<=0.005 muG/MM2. Preferably, the discharge vessel ( 10 ) contains less than 0.1 mg mercury. The discharge lamp according to the invention operates under unsaturated mercury conditions. m Hg D in x L dv = C ( 1 )
Bibliography:Application Number: EP20030799024