Eye protection was one of my concerns. Therefore my question if pointing the Laser to the ceiling or otherwise dipsersing it would still leave it dangerous?
The big advantage is ofcourse the exact wavelenght.
Laser modules are all over the place on eBay and Aliexpress. Different powers, different wavelenghts. I thought buying one that is less powerfull. I saw some that are offered without focusing lens, specially mentioned that they are for wide radiation. It is true those are mostly for IR, intended as IR luminators for IR googles.
I will post some links later.
As a first try I could see how a laser pointer works. (Especially how to disperse it.) But there I do not know the wavelenght. Did anybody already tried this?
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