Patent ID: 8400059
Filing Date: 2013-03-19
Classification: H01J

Abstract:
1. A mercury-vapor discharge lamp for homogeneous, planar irradiation, comprising a lamp bulb made of quartz glass, the lamp bulb encloses a closed discharge space into which two electrodes ( 10 ) project and defines a non-linear gas-discharge channel ( 8 ) extending between the electrodes, wherein the lamp bulb is formed as a quartz-glass chamber ( 2 ) defined by straight walls including bottom ( 4 ), top ( 3 ) and side walls ( 5 , 5 a ; 5 b ), the chamber being divided into sub-chambers ( 7 a ; 7 b ; 7 c ; 7 d ) by a plurality of separating webs ( 6 ) projecting from the bottom wall ( 4 ) to the top wall ( 3 ), the separating webs ( 6 ) comprising quartz glass plates spot-welded onto the bottom wall ( 4 ) and onto the top wall ( 3 ) of the quartz glass chamber, wherein the sub-chambers comprise a front-most sub-chamber ( 7 a ) and a rear-most sub-chamber ( 7 d ) and form in series interconnection the non-linear gas-discharge channel ( 8 ), wherein the separating webs ( 6 ) extend alternately from one of the side wall ( 5 a ) up to close to an opposite one of the side walls ( 5 b ) while leaving open a gap ( 13 ) connecting adjacent ones of the sub-chambers in a fluid-communicating manner, and wherein one of the electrodes ( 10 ) is allocated to the front-most sub-chamber ( 7 a ) and another of the electrodes ( 10 ) is allocated to the rear-most sub-chamber ( 7 d ).