Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!uwm.edu!ogicse!milton!hlab
From: jkollin@milton.u.washington.edu (Joel S. Kollin)
Newsgroups: sci.virtual-worlds
Subject: Re: Polarized light 3D systems: info wanted
Message-ID: <1991May19.214754.12204@milton.u.washington.edu>
Date: 19 May 91 06:51:14 GMT
References: <1991May15.232536.27134@milton.u.washington.edu> <1991May17.030937.9
Sender: hlab@milton.u.washington.edu (Human Int. Technology Lab)
Organization: University of Washington, Seattle
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Approved: cyberoid@milton.u.washington.edu


In article <1991May17.030937.9450@milton.u.washington.edu> buckland@ucs.ubc.ca (
Tony Buckland) writes:


> The key is the polarization of the photon stream which each eye
> sees.  Achieving this with a computer display would involve...

> having a mechanical device rotating 90 degrees in front of the
> display every 1/60th second or faster, while the display to ows
> alternating views for each eye.  This is a big mechanical...

WRONG! Not only is it possible to electronically change the
polarization of light at screen refresh rates, but Tektronix makes a
device which does just that (using, I believe, liquid crystals). Don't
assume that because you can't figure out a neat way of doing something
that it is impossible. It's bad enough when 'experts' make this mistake,
but you really should either do some research or put in a caveat when
you post...

Actually, most VR/'cyberpunk' people think things are much EASIER than
they really are. This is a refreshing change...

joel