From: sburton@dres.dnd.ca (Stan Burton)
Subject: Re: Long distance IR detection
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In article <1993Apr22.060607.12380@macc.wisc.edu> jvannes@vms.macc.wisc.edu writes:
> You are probably referring to the products of
>
> 		Opto Diode Corp.
> 		750 Mitchell Road
> 		Newbury Park Ca 91320
> 		805 499-0335
>
> The make some amazing IRLED's.  The really high-powered devices are arrays of
> 3, 6, or 9, LED's on a TO-66 header.  The 9-chip model puts out 6.5 Watts in
> response to a 5 Amp, 10 uS. pulse at a .5% duty cycle.  I think  these are
> designed as illuminators for IR vision systems.

Jeez, that should do it.

> I would also be interested in the application here.  I work with a Dance and
> Technology program, and want to build something to track dancers on a 30 foot
> wide stage from 50 feet away.

Very interesting application, controlled lighting and environment, moderate
distances ... might be more interesting than my application.  Just a thought,
you could use a roof mounted IR sender, similar in operation to a TV remote
control that tells each persons coded IR pulser to send a pulse.  A Hamamatsu
detector, as was mentioned in a previous message in this thread, would give
the current position.  Store and collate this on a computer and you could
replay the movements on the screen.  Interesting!

--

Stan Burton (DND/CRAD/DRES/DTD/MSS/AGCG)                 sburton@dres.dnd.ca
(403) 544-4737     DRE Suffield, Box 4000, Medicine Hat, AB, Canada, T1A 8K6