LASERVISION offers a big variety of laser protecting windows. Which window is the right one for your application? Enclosures around industrial lasers systems are often equipped with laser safety windows. As a matter of principle, there are two different modifications. Either the window is made of mineral glass or plastic. Plastic windows are more lightweight, in bigger sizes available and cheaper. Mineral glass filters are more rigid and therefore the only choice for certain high power laser applications.

Apart from the intrinsic laser data, there are also additional parameters to consider for the choice of an appropriate window. The divergence of the beam and the distance of the focus from the window are able reduce the energy density of the beam in case of a direct hit of the window in a way, that the use of a plastic window might be possible.

For example: a Nd:YAG laser with a beam diameter of 5mm emits 1000 pulses per second at a pulse duration of 500µs and a pulse energy of 0,1J. These values result in a protection scale of IL 8 and cause the use of a mineral glass filter of the Type T26. Though the beam is focused on a workpiece and is of course highly divergent after the focus. ( e.g. 10 degrees ) Because the distance of the focus and the window shall be 1m in our example, even a beam that is reflected by a mirror, will have a diameter of 17.5cm in the distance of the window. Therewith the required protection scale is reduced to a IL4 and a plastic window of the Type P2009 can be used. A layout or detailed description of the enclosure is therefore very useful to build bargain solutions.