Xref: utzoo sci.electronics:4247 misc.misc:3898
Path: 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.
Lines: 10


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)
.