Worked with an IR laser once (used for police laser radar jamming).  For
short bursts I could use a LCD display altho the lower power of an LED
may not light it.  We also had this film that would glow when hit with
the laser.  I think we got it from radio shack but that was also 8 years
ago.

Jinx wrote:

> Many substances fluoresce under UV light. Are there any
> which do so under IR or are the energy levels all wrong ?
> I think short wavelength UV is converted to longer wave-
> length visible light by the fluorescee and IR is longer than
> visible. Just wondering if there's some quirk of nature/
> physics that would make it possible to use invisible flood-
> lighting
>
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