The diameter of the circle formed by the cross section of the field of view of an optical instrument at a given distance.
The size of the laser beam. This can be adjusted by using different focal length lenses. Small spot sizes are used for detailed engraving while larger spot sizes are used for lower resolution engraving and cutting.
The area of the laser beam when properly focused on the target material.
The diameter of the spot upon which laser light is focused.
The minimum size of object which can be resolved at a given distance by an optical device. Stability A measure of system accuracy and reliability. Indicates how little a system reading moves from an original value.