We have manufactured heat resistant or UV-protective glass for lights, luminaires and other lighting applications for decades, as well as filter glass or color filters.
Sometimes with these products, the manufacturing challenges are not evident at first glance, as with the cover glass on the picture at the left. It is not only to be manufactured in such a way that it easily withstands a point load of 5 tons – the entire construction must be able to handle these forces, without causing unacceptably high mechanical stresses and therefore cracks or breaks.
Not shown in the picture: The glass is equipped with an anti-slip coating. This hardly impairs the optics at all, but prevents people from slipping on a wet, icy or snow-covered glass surface.