Effects of focus tolerance on the laser beam
The topic of focus/focusing and focus tolerance can be experienced directly if you want to cut or engrave using a laser. Because choosing the right lens is just as important as the optimizing the focus.
The finer and more detailed a graphic that is to be applied to an object by means of laser, the smaller the focal length of the lens must be. However, if thick materials are to be cut, lenses with a large focal length are recommended. As a practical example on the topic of focus/focusing, we use the 1.5 inch lens for a CO2 laser. This lens with a low focal length allows the engraving of graphics with the finest details thanks to a resolution of more than 500 dpi.