-=> TOM WALKER wrote to MIKE ROSS <=-

 ->  RJT> Not as elegant as an IR camera,  but one hell of a lot cheaper!   :-)

 -> I think most electronic cameras are sensitive to IR to some extent...
 -> (with the lights off of course) since to a CCD a photon of any colour is
 -> still a photon. I think a cheap alternative may be those simple camera
 -> modules used to wire into a circuit.

Most I've heard of include a filter to reduce IR
receptivity.
 

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