Re: Distance measuring using lasers

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Article #20003

#20003

From: Darrell McGinnis
Date: Sat, 12 Nov 1988 00:22

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One technique might be related to measuring the speed of light over a fixed
distance. This technique modulates the light beam and measurees the
PHASE difference between the outgoing beam and the incomming beam.

Resolution depends on the wave-length of the modulation frequency.


Maybe a sweeped modulation would give good results at both extremes
(low freq for gross distance/ high freq for finer resolution)
.

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!tektronix!pogo!darrellm

References: <113@ericom.ericsson.se>

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!tektronix!pogo!darrellm
From: darrellm@pogo.GPID.TEK.COM (Darrell McGinnis)
Newsgroups: sci.electronics,misc.misc
Subject: Re: Distance measuring using lasers
Message-ID: <6273@pogo.GPID.TEK.COM>
Date: 12 Nov 88 00:22:44 GMT
References: <113@ericom.ericsson.se>
Reply-To: darrellm@pogo.GPID.TEK.COM (Darrell McGinnis)
Organization: Tektronix, Inc., Wilsonville,  OR.
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