Path: utzoo!attcan!uunet!lll-winken!sun-barr!decwrl!ucbvax!hplabs!hpl-opus!hpnmdla!hpsad!frankb
From: frankb@hpsad.HP.COM (Frank Ball)
Newsgroups: sci.electronics
Subject: Re: the laser speed measuring device
Message-ID: <1840014@hpsad.HP.COM>
Date: 25 Nov 89 06:00:02 GMT
References: <89325.164006BHB3@PSUVM.BITNET>
Organization: HP Signal Analysis Division - Rohnert Park, CA
Lines: 11


The article doesn't say what wavelength the laser is.
I would think that if it was visable light or infared (most likely)
that normal car headlights would jam it quite well.  They can't use
very much power, or it would be a hazard if it got aimed in a driver's
eye.  Halogen lamps put out about 90% of their light in the infared
range, coventional lights even more.  Maybe they weren't planning
on using these lasers at night?  Maybe car lamps aren't focused 
enough to jam at long distance, but they should when you get closer.

Frank Ball          frankb@hpsad.HP.COM


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