Low-pressure mercury vapour discharge lamp

• Main Authors: VAN DEN BOGERT, WILLEM JOHANNES, WANNINKHOF, MARKUS WILHELM MATTHIJS, ROOZEKRANS, CHRISTIANUS JOSEPHUS
• Format: Patent
• Language: English; French; German
• Published: 23.08.1989
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Low-pressure mercury vapour discharge lamp having a discharge vessel (21) filled with mercury and a rare gas, which discharge vessel comprises two substantially parallel, mainly rectangular flat glass plates (22, 23) located at a relatively short distance from each other and being transparent to light, which plates are connected together in a gas-tight manner proximate their circumference and form upright walls (24, 25, 26, 27), electrodes (28, 29) between which a discharge is maintained in the discharge vessel during operation being arranged on the outer side of the discharge vessel, said electrodes (28, 29) being in the form of strips of conducting material which are arranged on at least two facing upright walls (24, 25) and which extend substantially throughout the length of these walls.