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Subject: Re: Deflecting laser beam 90°
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Date: Mon, 30 Sep 2002 12:24:20 -0400
NNTP-Posting-Date: Mon, 30 Sep 2002 12:24:18 EDT
Organization: Bell Sympatico
OK...thanks for the suggestions. But i think i'll use
them for my other laser based ideas...
After posting 3days ago to more specific newsgroups about
cats and kids...I had more than 70 replies from (mostly) parents
and it turned out has i was suspecting that the stories about
cats harming children in their bed where "old wive's tales" .
Maybe a good do-it-once project for over protective parents? ;-)
"Ian Buckner" wrote in message
> "Sir Charles W. Shults III" wrote in message
> > For high accuracy projects, you use first surface mirrors. For
> running a
> > beam around your yard, you use plastic mirrors. Modulate the beam
> and it will
> > be far superior to any other simple light source in the long run.
> Since the
> > beam diverges slightly anyway, your density is soon low enough to be
> safe for
> > just about anything. Modulating it also greatly increases the
> safety because
> > with a duty cycle of, for instance, 50%, you have cut the effective
> power in
> > half.
> > Cheers!
> > Chip Shults
> > My robotics, space and CGI web page - http://home.cfl.rr.com/aichip
> Note Chip's "modulate" suggestion - this is very important. If you use
> (for example) a constant % mod depth, you can use that as a way of
> instantaneous AGC. Bandpass filtering also helps with room
> level changes.
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