P3D Re: PHOTO-3D digest 3134

["Jeff Jessee" <jeffjessee@xxxxxxxxxxxxx>]

The goggles were
>quite strange, however.  They appeared to be polorized
lenses like would
>be used with a stereo slide projector, but the lenses
"changed" as they
>were exposed to light.  Looking through one of the lenses
at an angle
>you could watch a gas or a liquid of some sort flow from
one end to the
>other of the lens.  An employee indicated that they were
LCD lenses, and
>I wonder how this is different from regular polorized
lenses?
>
>
>Steven Stultz



The Central Florida Stereo Club got a tour of the IMAX 3-D
projection booth when we went to the Orlando IMAX to see the
underwater 3-D movie. They answered all our questions,
including about the goggles. They use LCD shutters as the
main separation mechanism, but just in case that quits
working (or maybe you block the infared sensor which
synchronizes them with your hand), they also have separate
polarizing material on them.

LCD shutters completely block the light to one eye or the
other, synchronized with the projector. I don't think its
done with polarization, but I'll leave that to the experts
to explain.

Jeff Jessee



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