Effects of focal tolerance on the laser beam
The importance of focusing and focal tolerance becomes critically obvious when you want to cut or engrave using a laser. This is because choosing the right lens is just as important as optimising the focal length of that lens.
The greater the image definition required, and the more intricate detail contained in the graphic that is to be applied to an object by means of a 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, if we were to use the 1.5 inch lens with a CO2 laser, this lens, which has a small focal length, enables the engraving of graphics with the finest detail thanks to a resolution of more than 500 dpi.