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From: junk@ur-tut.UUCP (Jan Vandenbrande)
Newsgroups: net.auto
Subject: Re: Laser Pulse Speed Enforcing
Message-ID: <59@ur-tut.UUCP>
Date: Sun, 16-Mar-86 14:59:25 EST
Article-I.D.: ur-tut.59
Posted: Sun Mar 16 14:59:25 1986
Date-Received: Sat, 22-Mar-86 01:56:26 EST
References: <378@ur-tut.UUCP> <843@kitty.UUCP> <442@utastro.UUCP> <861@kitty.UUCP> <252@noscvax.UUCP> <184@axiom.UUCP>
Reply-To: junk@ur-tut.UUCP (Jan Vandenbrande)
Followup-To: Laserpulse Saga
Distribution: na
Organization: Univ. of Rochester Computing Center
Lines: 15
Keywords: Reflections with lasers
Summary: Mirror Visible Light <> Mirror IR

...
	How these device really work still seems to be largely unknown.
It would seem that either a fairly wide beam is to be used to get any 
consistent reflection, and/or a very powerull beam is to be used (very
in relative terms of course). There are no FCC regulations on IR radiation.
So it could be potentially harmfull to the retina.

	Another issue seems to be where to reflect of. It would seem that
an all black car would be virtually immune to laser pulse devices.
However, we are judging the color of the car in our visible spectrum.
What really matters is what the IR lightbeam considers a reflector and
absorber. This sometimes differs significantly from what we see in the 
visible spectrum. My guess right now is that the windshield could be a 
good candidate for reflection (but the angle...???)
Jan.