I am in need of a very accurate dot measuring tool, and someone else has just recommended me 5mW 515nm green laser diode module. It is very compact designed, available with only 16mm diameter laser tube. However, it contains the most complete internal cooling system, thus I have no need of its beam stability.
When I made the test with this 5mW 515nm green laser diode module, it keeps very stable 5mW output power after 5 hours continuous lighting. If users are in need of making extremely dot generation, this advanced laser module is just a quite nice choice. Your guys might have a try.