Re: 3D IMAX

[P3D Andrew Woods <andrew@xxxxxxxxxxxxxxxxxxxxx>]

Ralph Johnston  <copley@xxxxxxxxxxxxxxxxx> wrote:
> In reference to the recent letter stating the IMAX theaters probably used
> polorized glasses:
> 
> They use LCD (liquid crystal) type shutters in a headset with a radio
> receiver built in.  This completly blanks one eye at a time.  There is not
> of the ghosting you get the polorazied glasses.  The sync signal comes in
Date: Tue, 18 Jun 1996 09:02:14 -0500
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> over the radio receiver.  I saw a movie in the NYC theater a year ago on a
> field trip with the NE Photo Historical Society.

IMAX 3D theatres can be implemented using either the polarised technique
or with Liquid Crystal Shutter Glasses.  The Imax theatre in Vancouver was
one of the first IMAX 3D theatres so it used the polarised technique.
I think the SONY IMAX 3D theatre in New York was the first IMAX 3D theatre
to use shutter glasses.  The IMAX shutter glasses were first used at
an _OMNIMAX_ 3D theatre (called SOLIDO) south of Tokyo, Japan.

Incidentally, I think the glasses recieve their synchronisation signal
via Infra-Red.

Andrew.


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