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- From: fcrary@ucsu.Colorado.EDU (Frank Crary)
- Newsgroups: rec.guns
- Subject: Re: LASERs - rangefinders?
- Message-ID: <199211170430.AA12256@ucsu.Colorado.EDU>
- Date: 17 Nov 92 13:15:39 GMT
- Sender: news@mimsy.umd.edu
- Organization: University of Colorado, Boulder
- Lines: 18
- Approved: gun-control@cs.umd.edu
-
- In article <1992Nov16.181832.26818@jpl-devvax.jpl.nasa.gov> leem@jpl-devvax.Jpl.Nasa.Gov (Lee Mellinger) writes:
- #Not exactly, police speed radar uses the Doppler principle, however
- #police Laser speed detectors use muliple range finding technique to
- #calculate the velocity. Distance to the target is taken at precisely
- #known time intervals, the differential distance is divded by the time
- #to give the speed. You probably could use one of these with
- #modification to measure target distance, but you better have money to
- #burn, I understand that these devices go for $3-$5k.
-
- And if you were shooting at a large (over, say, 2 m^2) metal target.
- Radar only works on things which reflect radio waves. The one of the
- advantages of laser ranger-finders is that it will work on anything
- which reflects light (e.g. anything not painted black.)
-
- Frank Crary
- CU Boulder
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