Quote:
Originally Posted by TechniSol
BTW, for anyone experimenting, you need to be quite sure that whatever you're attempting to block the IR beams with is actually opaque to IR. I designed and prototyped a laser tag arena/outdoor gaming system and in my research came to discover a surprising variety of items apparently opaque to visible light pass IR like a sieve. No guarantees.
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Do you have any examples of common things that pass IR but which are likely not to? I've been using Mrs_Often's and davidfor's technique with paper. I've just tested and found that my camera-phone doesn't have an IR filter (odd that still isn't done - no doubt there is a reason) by pointing my TV remote at it, so I can do a bit of checking anyway once it gets dark - the Touch IRs are quite dim, which is to be expected given the short range.