BlueLight Excimer SystemsCompared with conventional UV emitters, excimer emitters offer properties which improve and expand the use of UV radiation in industry, preparative chemistry, biology and medicine. The monochromatic spectrum and the ability to select specific wavelengths allow photo-processes to be carried out in a much more focused manner. In addition there is no unwanted heating effect, as excimer UV emitters produce no infrared radiation in their spectrum.
Excimer UV Emitters
Excimer is an abbreviation of "excited dimer". This is essentially a pair of atoms with 1 excited gas atom, which are normally not bonded in the ground state. (Xe + Xe* = Xe2* (Excimer)).
Noble gases and noble gas/halogen mixtures can form excimers. The Excimer state is very short lived. On decomposition of the excimers, UV radiation is emitted in a very tight, quasi monochromatic spectral range. Depending on the choice of gas, different narrow band UV spectra are produced, predominantly in a single spectral line.
Today, there are several different excimer combinations, which can produce UV radiation in the wavelength range between 120 nm and 380 nm. The spectrum has no infrared component and emitters provide the pure UV spectrum.
The gas discharge is created by a high frequency electromagnetic field. Electrodes are therefore not needed in the gas discharge. High power excimer emitters are operated with water cooling to prevent heating of the emitter.
Heraeus offers two excimer versions:
High power excimer systems with water cooling
BlueLight Compact excimer systems without cooling
