If there is not a clear method for users to get super clear dot alignment in distance, it would be the most marvelous experience for users to make good use of high brightness Berlinlasers green dot laser alignment. It is getting the designed best work distance of 3 meters. However, owing to its less than 1mard laser beam divergence, this green laser module is just able to work with super clear and small size green reference dot targeting within the maximum distance of 25 meters.
This green dot laser alignment is allowing free adjustment of laser beam focus, only according to free screw of laser beam aperture part, green laser light is temporarily focused, and then forming into a quite compact green dot in use. Owing to its compact structure made laser tube diameter of 16mm and 26mm, users can install it on any other industrial machine or device, and then achieving the clearest dot instruction on different working surfaces effectively.
http://www.berlinlasers.com/532nm-green-dot-projecting-laser-alignment