U.S. Philips Corporation

Charles C Meulemans

Adrianus P Severijns

Petrus J Severin

Gerardus H Van Der Steen

Jan Van Werkhoven

Franciscus M Oostvogels

The irradiation device comprises a short arc discharge lamp, in which a pair of electrodes are arranged, between which a discharge path extends. An optical conductor is sealed with its first end into the wall of the lamp vessel in such a manner that its light entrance window is arranged laterally of the discharge path and is directed to the discharge path.

Irradiation device comprising a short arc discharge lamp

High-pressure discharge lamp according to the invention have a quartz glass lamp vessel (1) which consists locally of UV-absorbing quartz glass (shaded region 2). During operation of the lamps the normally colder wall parts of the lamp vessel in this region thus assume a higher temperature, as a result of which the efficiency of the lamp is increased while said regions (2) nevertheless remain transparent to visible radiation.

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Eindhoven, Netherlands

Charles C Meulemans