Optical filter for protective glass used in laser welding or soldering, comprises borosilicate glass or alkali-free glass with antireflection layer applied by dip coating

摘要

Borosilicate glass or alkali-free glass is used as a glass matrix which is provided with at least one antireflection layer using a dip coating technique. The antireflection layer is preferably for a wavelength range 300 nm to 1500 nm. An independent claim is included for a method of manufacturing optical filters.