Mercury-vapor discharge lamp for homogeneous, planar irradiation

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, 5a;

• 5b), the chamber being divided into sub-chambers (7a;
• 7b;
• 7c;
• 7d) by a plurality of separating webs (6) made of quartz glass and projecting from the bottom wall (4) to the top wall (3), wherein the sub-chambers comprise a front-most sub-chamber (7a) and a rear-most sub-chamber (7d) 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 (5a) up to close to an opposite one of the side walls (5b) 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 (7a) and another of the electrodes (10) is allocated to the rear-most sub-chamber (7d),
• wherein the front-most sub-chamber (7a) and the rear-most sub-chamber (7d) each have an opening connected to one end of a quartz-glass tube (9) in which one of the electrodes (10) is arranged, and wherein a power connection (11) for the one electrode is guided out of the quartz-glass tube (9) via a gas-tight, pinched section (12) at an opposite end of the quartz-glass tube and wherein the quartz-glass tube (9) comprises quartz glass containing a dopant causing an absorption for VUV radiation of a wavelength around 185 nm.