P3D LCS glasses in IMAX

[Ray Hannisian <ray@xxxxxxx>]

John Roberts wrote:

>In 3D IMAX, the movie is shown at 48 frames
>per second, so each eye sees 24 frames per second.

It is my understanding that each frame is 'double shuttered', resulting in
an effective oscillation of 96 HZ, thus reducing the visable flicker.

I had the opportunity to tour the projection booth in the New York City
Imax theater, as a guest of Paul Panabaker of IMAX.  There are two 8 to 10
foot diameter platters holding the left and right eyes' content, which is
shot in 6 x 7 cm horizontal frames.  Each reel presents 24 new images per
second, alternated and double shuttered to acheive 96 Hz.

I was lucky enough to be given a single IMAX frame which had been cut from
a broken film copy.  I keep in in the case with my Realist Red Button
viewer.  It makes a very nice souvenir, and helps to explain the difference
between the resolution (and costs) of my Realist format slides and IMAX!

Sincerely,


Ray Hannisian

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