Originally posted by: Triumph
Originally posted by: Fiveohhh
Originally posted by: Triumph
The reason you can't see through glass is that glass filters out the frequencies of the electromagnetic spectrum that the IR camera "sees" in, roghly 3-5 and 8-12 micrometers.
So it reflects those waves I'm guessing than?
It reflects or absorbs them on the other side, yes. Three things can happen when electromagnetic waves hit a surface. They can be absorbed, transmitted, or reflected. So you are seeing only the reflection part of your infrared signature when you point the camera at a glass surface. Alot of times you won't even see a reflection when you look at glass. Instead you'll just see all black or all white, because the glass absorbs all of the waves in that part of the spectrum. Different types of glass behave differently though, I guess.