I'm working on two arduino (one a dock, the other one on a robot) communicating through a IR to let the latter know about its location.
I 3D printed a piece which goal was to channel the 3 IR led lights, to prevent them from overlapsing (exactly in the same manner as the Kobuki.
For a reason I don't know, the IR signals seem to go through the 3D printed piece which doesn't seem to let visible light through.
I known that there is no 100% absorbant materials, and I know "black for visible lights" doesn't necessarily mean "black for IR lights".
I think my problem is more related to my lack of experience in the field. My question is : why do I get signals from a IR led channeled toward a location I am not in ?
Patently, it means my light channels are not channeling light.
Therefore, better : How can I make a better (and cheap) channel for IR light ?
The piece I 3D printed is grey (silvery like I guess)
edit : to prevent incomprehension, i would like to clarify "channel". What I mean is to block all light "not going" in the right direction, whatever happens to that light. I apologize if it is not the word I should have used.