Coating Technologies

Magnetron sputtering devices rank among the most powerful coating apparatuses that are used to vapor deposit particles on the basis of plasma to produce high-quality interference filters of up to 200 mm in diameter and 40 mm in thickness. Thanks to the extremely stable growth of the layers, the excellent control of the layer thicknesses, the ability to apply multiple layers, for instance extremely hard and scratch-resistant AR coatings on sapphire substrates, and the high total thickness of the layer, extremely small band bandpass filters, steep edge filters or so-called notch filters (triple notch, for instance) are possible. These types of filters are used in the area of fluorescence microscopy or Raman spectroscopy.