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From: pepke@SCRI1.SCRI.FSU.EDU (Eric Pepke)
Newsgroups: sci.virtual-worlds
Subject: Re: Polhemous tracking devices
Message-ID: <8076@milton.u.washington.edu>
Date: 24 Sep 90 13:07:01 GMT
References: <7467@milton.u.washington.edu> <1990Sep21.143120.21614@maths.tcd.ie>
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The Polhemus tracker is made, surprisingly enough, by Polhemus Navigation 
Sciences (which used to be Polhemus Data Services, I think.)

Byte magazine had a little summary of the Polhemus tracker in the same 
issue that described the DataGlove, July 1990.  The transmitter has three 
orthogonal coils of wire.  So does the receiver.  Each of the 
transmitter's three coils is pulsed, and you get amplitude measurements 
for each of the three reciever's coils, for nine measurements.  That's 
enough.

I think the tracker runs a couple of $K.  Beacuse everybody uses their 
tracker, I guess they've got a pretty tight patent on it.

Eric Pepke                                    INTERNET: pepke@gw.scri.fsu.edu
Supercomputer Computations Research Institute MFENET:   pepke@fsu
Florida State University                      SPAN:     scri::pepke
Tallahassee, FL 32306-4052                    BITNET:   pepke@fsu

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