If there is no other good method to get clear enough dot targeting at different work distance, it is just a good chance for users to have a try of Berlin lasers green dot laser alignment. it is getting quite nice designed adjustable focus, only according to quite simple screw of laser beam aperture, green laser beam can be temporarily focused, forming into the most compact size green laser dot on different working surfaces.
The use of green dot laser alignment gets free selection of output power of 5mW to 100mW, accept sunlight working occasion, a correct output power made green laser module can easily bring users no mistake dot positioning. At the same time when the real laser dot targeting work is processed with a laser alignment mounting bracket, green laser dot can also take quite low time consumption, making sure of clear laser dot targeting for those of high height, long distance and hard reaching work place etc. This green laser module is a wonderful choice for laser marking machine, laser engraving machine, military targeting, drilling system etc.
http://www.berlinlasers.com/532nm-green-dot-projecting-laser-alignment