:-?pseudonomen137 said:...and you can also use film negatives as crude green block/IR pass filters - just stack unneeded negatives a couple layers thick.
BlueFusion said:Thats a rather good idea. But you'd have to bung the prism really close to the laser cos the IR is so divergent.
But that could work. You'd get a green dot and like 10cm left or right, an IR blob.
Benm said:If it sees a remote control's led, it will probably work. Remote controls usually work in the near IR, 850 nm or so.