From: gsulliva@enuxha.eas.asu.edu (Glenn A Sullivan)
Subject: Re: Long distance IR detection
Summary: Results of IR beacon tracking hardware tests  
Organization: Arizona State University
Lines: 15

sburton@dres.dnd.ca (Stan Burton) writes:..........
> I would like to be able to detect the angular position (low accuracy) of an
> IR emitting source at a distance of about 100 meters (more is better) in
> daylight.  The IR source could be emitting a signature; I'm leaning toward
> 30 KHz square wave with 50% duty cycle.
> 
I designed and built hardware in 1988 that would output a logic level (from
a 567 tone detector) upon detecting a 500 microwatt LED 28 feet away.
Used a Motorola MRD360, biased linearly  in a DC-feedback loop to servo out
variations in sunlight (and 60Hz from lights). Used no lenses.

Allen Sullivan



