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From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: net.auto,net.auto.tech
Subject: Re: Laser Pulse Speed Enforcing
Message-ID: <877@kitty.UUCP>
Date: Sat, 15-Mar-86 10:28:15 EST
Article-I.D.: kitty.877
Posted: Sat Mar 15 10:28:15 1986
Date-Received: Tue, 18-Mar-86 23:14:58 EST
References: <378@ur-tut.UUCP> <843@kitty.UUCP> <442@utastro.UUCP> <861@kitty.UUCP> <252@noscvax.UUCP>
Distribution: na
Organization: Recognition Research Corp., Clarence, NY
Lines: 22
Xref: dcdwest net.auto:7891 net.auto.tech:946
Summary: Sorry, but it will work...

In article <252@noscvax.UUCP>, jordan@noscvax.UUCP (Martin C. Jordan) writes:
>         I have a question concerning the practical implementation of
> an IR/visible laser pulse to speed enforcement. Laser radiation will
> either be reflected, absorbed, or backscattered at the surface of the 
> oncoming vehicle. Unless the vehicle is a MACK truck, the reflected 
> component will be reflected at some angle AWAY from the direction of 
> arrival. ...
>         Any counters to this hypothesis? If not, I shall sleep easier
> knowing Buford T. Justice will be denied his cut of the Star Wars' pie.

	No surface of a motor vehicle will be such a perfect reflector or
absorber such that sufficient DETECTABLE modulated IR energy will NOT be
returned to the laser device.  This statement is based upon the output
power/detector sensitivity characteristics of one prototype device which
I have seen that has a nominal range of 1,000 meters in clear air.

==>  Larry Lippman @ Recognition Research Corp., Clarence, New York        <==
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