Path: utzoo!attcan!uunet!modcomp!nigel
From: nigel@modcomp.UUCP
Newsgroups: comp.graphics
Subject: Re: How to view Superbowl 3-D
Message-ID: <2900002@modcomp>
Date: 23 Jan 89 14:46:00 GMT
References: <3230@datapg.MN.ORG>
Lines: 28
Nf-ID: #R:datapg.MN.ORG:3230:modcomp:2900002:000:1349
Nf-From: modcomp.UUCP!nigel    Jan 23 09:46:00 1989


/* Written  1:02 am  Jan 23, 1989 by datapg.UUCP!sewilco */
>All I knew of the glasses was what was shown on TV, with
>an almost clear left lens and a dark right lens.  I
>suspected the right lens was either polarized or was
>creating an interference pattern (perhaps both), as
>the image was supposed to look good without glasses.

All you need is a clear left lens and a dark right lens!  A pair
of cheap sunglasses with the left lens taken out will do just as
well (if not better) than the "official" glasses.  And there was
nothing special about the television transmission, except that all
the action was carefully choreographed so that the foreground figures
were all travelling across the screen from left to right.  You can see
this effect on any television transmission that has this type of motion.
For example, horse racing with the horses travelling from left to right.
(If you reverse the lenses, so that the dark lens is on the left, then
foreground action travelling from right to left will appear to stand out.)

This effect was demonstrated on British TV more than ten years ago.
One explanation then current proposed something like a perceived time lag
of the rays coming through the darkened lens - more a physiological than a 
physical effect.

Nigel Gamble
MODCOMP an AEG company
Ft Lauderdale FL 33340-6099
uunet!modcomp!nigel