[Al Skierkiewicz]

OK,
Before you guys get too crazy, the IR emitters generate energy in the same area as heat but have one distinct difference. The emission will occur as 40kHz pulses for varying lengths of time. That is, bursts of 40kHz modulated IR energy. The night illuminators on cameras are just that, steady state, non modulated sources the same as hot bodies. The IR camera range finders and remote controls use modulated IR emitters at different frequencies so there should be no real problems if you keep in mind that you are looking for a 40kHz modulated source. The bandwidth of the IR is not 40kHz but likely is much wider than that since the bandwidth you are measuring is near visible light.