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ah, thank you very much for the information... and it's for the operation process, to point an area on the screen :D

Hmm... :D, for example, I have 3 laser pointers, and I want them to result not only in dot, maybe the second results in triangle, and third results in square... does that kind of laser pointer exist? :thanks:

Hi Guys, I'm new to lasers, so I need help on this I'm creating a laser pointer for medical purpose. I want to use several laser (2 or 3) at the same time and I'm using the same red diode laser types. I want to make differentiation from 1 to another laser so I know which one is on and which one...