Mercury discharge lamps

H - Electricity – 01 – J

Patent

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Details

H01J 61/20 (2006.01) H01J 61/32 (2006.01) H01J 61/72 (2006.01) H01J 61/76 (2006.01) H05B 41/26 (2006.01)

Patent

CA 2440109

A discharge units comprises a transparent envelope filled with a discharge gas containing mercury, and electrodes for exciting the gases by applying an electric field. It has been found that if, apart from the mercury vapour, the gas is about 99% argon and of the order of 0.1-1% krypton then the proportion of near-visible UV lines is increased, in relation to the 254-nm line, particularly if pulsed excitation is used. This increases the efficiency of the lamp when used to excite visible phosphors.

Unité de décharge qui comporte une enveloppe transparente emplie d'un gaz de décharge contenant du mercure, et des électrodes destinées à exciter les gaz par application d'un champ électrique. Il a été découvert que si, outre la vapeur de mercure, le gaz est constitué d'environ 99 % d'argon et de krypton à raison de 0,1 à 1 %, la proportion des lignes UV visibles proches est augmentée, par rapport à la ligne de 254 nm, en particulier si une excitation pulsée est utilisée. L'efficacité de la lampe lorsqu'elle est utilisée pour exciter des phosphores visibles s'en trouve ainsi augmentée.

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