 | 1899 High-purity quartz glass melted by Richard Küch |
 | 1904 Quartz glass arc lamp emitting UV light invented at Heraeus |
 | 1911 Start of the success of the Höhensonne |
 | 1920s Launch of the Original Hanau brand |
 | 1950s First infrared emitters |
 | 1958 First Heraeus sales companies abroad |
 | 1973 Heraeus takes over all shares of Quarzlampengesellschaft |
 | 1992 Heraeus Noblelight GmbH founded to merge UV and infrared activities of the Heraeus group |
 | 1995 Carbon Infrared (CIR) technology invented |
 | 2002 Foundation of Heraeus Noblelight Shenyang Ltd. in China |
 | 2004-2005 Acquisition of specialist lamp manufacturers Cathodeon Ltd. and IST Spectral Technologies |
