From: dither@vms.macc.wisc.edu (Dennis Adams)
Subject: Re: 1-eyed 3D
Date:  3 DEC 91 22:51:43    
Organization:  University of Wisconsin Academic Computing Center



In article <1991Dec2.160210.28020@milton.u.washington.edu>, ee91ajh@brunel.
ac.uk (Adam J Holt) writes...

>Does anybody know anything about the (seemingly new) idea of 3D using a single
>filter over one eye?

If this is the same idea as the Coke glasses used during the halftime show
a couple of years ago, it is called the Pulfric (sp?) effect, and is based
on the fact that the signals from a filtered eye take longer to process by
the brain than the unfiltered eye.  The Coke glasses had colored filters,
but this really wasn't needed.  Since both eyes see the same 2D images,
there are some tricks used in order to see 3D.  You will notice that all
the "front" images are moving left to right, "central" objects are
stationary, and "back" things are moving right to left.  Due to the extra
delay in the left eye (in the case of the Coke glasses) your brain perceives
parallax in what would ordinarily be a 2D image.  Presto! 3D!  This isn't
going to be very useful for VR, but there is at least one video game based
on it (I'm told).  I would imagine it is some kind of spinning sphere made
up of dots or something.

--Dennis Adams