Article View: sci.electronics
Article #3848Re: the laser speed measuring device
From: Henry Spencer
Date: Sun, 26 Nov 1989 00:21
Date: Sun, 26 Nov 1989 00:21
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In article <1840014@hpsad.HP.COM> frankb@hpsad.HP.COM (Frank Ball) writes: >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... The laser gadget is almost certainly using a pulsed beam rather than a continuous one, and picking pulses out of a continuous background is not generally a difficult problem. Car headlights don't even show the 120Hz modulation of normal AC lighting, much less pulses short enough to confuse something with nanosecond-range resolution. -- That's not a joke, that's | Henry Spencer at U of Toronto Zoology NASA. -Nick Szabo | uunet!attcan!utzoo!henry henry@zoo.toronto.edu
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!utzoo!henry From: henry@utzoo.uucp (Henry Spencer) Subject: Re: the laser speed measuring device Message-ID: <1989Nov26.002133.3245@utzoo.uucp> Organization: U of Toronto Zoology References: <89325.164006BHB3@PSUVM.BITNET> <1840014@hpsad.HP.COM> Date: Sun, 26 Nov 89 00:21:33 GMT