Date: Wed, 12 Jul 2000 14:24:10 -0500 (EST)


Subject: Re: seeing IR


I have used a digital camera to pick up IR from a remote control. Perhaps
you could use one along with one of the methods below...

C. Redmon

On Wed, 12 Jul 2000, William Beaty wrote:

> A flat-sided tank of water with a few drops of milk? A smoke-box? Fog
> from dry ice in hot water, or an ultrasonic humidifier? Depending on the
> IR source, I think the beam will behave in much the same way as red light.
> It's only "infra" because human eyes don't detect it. Now longwave stuff,
> that's different. Clouds and fog supposedly don't scatter it, and if the
> wavelength is long enough, you can see through plywood and sheet rock
> walls. But a standard BW video camera isn't very sensitive to longwave
> IR.
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