P3D Re: polarised screen

[Andrew Woods <andrew@xxxxxxxxxxxxxxxxxxxxx>]

Bob Maxie <BMAXEY@xxxxxxx> wrote:
> emanon/noname wrote:
> > Well, there is another way to produce a very
> > good "3-D" effect without
> > using a polarized screen.  And, this method
> > is much less costly than
> > purchasing a polarized screen.
> 
> What the heck is a Polarized Screen? I think
> you mean a non-depolarizing, metallic surface
> screen, or Silver Screen, and the like????

I just twigged what Mr. "Emanon" may be talking about.
The term polarising screen is also used to describe the "stereoscopic
shutter" available from NuVision  http://www.nuvision3d.com
also called a stereoscopic modulator, polarising shutter, etc.
(all terms which I've never been entirely happy with).

The "stereoscopic shutter" is basically a large liquid crystal panel
which fits over the face of a monitor.  It can be electrically switched 
into two different polarisation states.  When driven in synchronisation
with a field-sequential stereoscopic display, left images are 
clockwise polarised and right images are anti-clockwise polarised.
The observers wear passive polarised 3D glasses to view the 3D image.

The original thread was however talking about using a projection 
screen which retains polarisation (e.g. a metallised screen) when
projected onto.

Andrew Woods            http://info.curtin.edu.au/~iwoodsa


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