Koninklijke Philips Corporation N.v.

Achim Gerhard Rolf Körber

Rainer Hilbig

Robert Peter Scholl

Johannes Baier

Matthias Born

A high-pressure mercury vapor lamp suitable for sterilization purposes. Germanium and oxygen are added in small quantities to the mercury and/or the mercury halides, with a molar ratio of germanium to oxygen being greater than 1. The addition of germanium monoxide increases the GAC efficiency (GAC: short for Germicidal Action Curve) of a high-pressure mercury vapor lamp, because germanium monoxide emits a strong molecular band system in the range from 250 to 280 nm.

High-pressure mercury vapor lamp incorporating a predetermined germanium to oxygen molar ratio within its discharge fill

A high-pressure metal halide discharge lamp which comprises, as filling, only zinc, a halogen and a noble gas. In order to improve the color rendering index, a calcium halide may be added to the lamp filling. The coupling-in of energy preferably takes place without electrodes in the radio-frequency range or in the microwave range, but may also be carried out by means of metal electrodes.

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Kerkrade, Netherlands

Achim Gerhard Rolf Körber