Focal length of 80W module

- 2021-07-14-

wavelength:450nm For engraving work: the focus is on the surface of the material For cutting work: the focus is below the surface of the material, half-thickness below. for example, if the focus is 45mm, you want to cut 4mm plywood, the distance from the lens to material surface should be 45mm-4mm/2=43mm