Quote:
Originally Posted by TechniSol
Peakcrew,
Gads, it's been years since I initially researched, but the hard and fast rule of thumb was don't assume just because it won't pass visible or appears opaque that it won't pass IR... test it. You have an IR sensitive camera, a TV remote makes an OK, if a bit dim, IR source for testing. A piece of exposed/developed 35mm negative appears black, but passes IR and blocks visible pretty well.
... I'm sure any black looking expanse of plastic in the decor probably hides an IR camera as well.
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That was a great post - thanks!
I have done some work on security systems in the past, and agree entirely about the black plastic in decor!
I was only really asking if there was anything common that our fellow posters might think would block the beams but wouldn't. I know that you can't rely on how it deals with visible light - cotton is a poor UV reflector, for instance. However, my tests with my phone camera suggest that paper and cardboard are IR opaque in the range my Touch uses, and Daivid and Mrs_Often seem to be able to show that the same works on the Glo.
I tried the teast again last night on my Touch - use the switch to put it to sleep, and quickly put a postcard on the screen. No noticable battery drain after 10 hours. Tonight I'll put a raised section in the card to make sure it interrupts the beam (though I'm fairly sure it does when flat) just to make sure that the old Touch is immune.