Originally Posted by
SMallas
Hi Laser Doc,
Could you please clarify your comment on the tightness of the RF beam being better, as the first thing that is recommended to improve an RF beam is to expand it?
Ps. You can't really tar all glass laser tubes with the same brush. There are some manufacturers producing some fantastic tubes, that I would put up against any RF tube.
Ps. It's the longer the focal length of the lens, the longer the depth of field ( cuts thicker ). Shortening the focal length will increase the beam intensity, but at a cost of depth.