Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



IR and UV glass.

rathat

Member
Joined
Jul 21, 2008
Messages
145
Points
18
So if glass absorbs high uv and ir and only allows the visible spectrum to pass than would that black plastic in the front of remotes be clear if we could see ir?
 



Foobario

New member
Joined
Jul 28, 2008
Messages
91
Points
0
Yes.

And, interestingly, if you were to use that same black plastic to make a lens, it would focus the IR the same way glass focuses the optical wavelength.

I used to work for a company that made motion detectors... mounted in front of the IR sensor was a piece of plastic that looked a lot like a Fresnel lens, but it was black plastic. Turns out that IR is refracted by the black Fresnel lens exactly like light would be by a clear one.
 

rathat

Member
Joined
Jul 21, 2008
Messages
145
Points
18
Regular glass wont block low ir like from a laser right? And what about acrylic? Would that basically have the same properties?
 




Top