Effects of focus tolerance on the laser beam
Focus and focus tolerance can be directly compared if you want to cut or engrave with a laser. Choosing the right lens for your application is equally as important as optimizing the focus.
In order to achieve a fine and highly detailed laser engraving, you will need a lens with a smaller focal length. However, if you are cutting thicker material, a lens with a large focal length is ideal. In our focusing example, we use the 1.5-inch lens for a CO2 laser. This low focal length lens provides finer detailed engravings of the graphic due to a resolution of more than 500 dpi.