Re: PHOTO-3D digest 1314

[P3D Marvin Jones <72657.3276@xxxxxxxxxxxxxx>]

> >2) why is it that in a small theatre that shows polarized 3d films everyone
in the room can see the effect, regardless of position? It seems (from my
testing) that one needs to be in a specific position for a particular
arrangement of the glasses and projector filters...I looked up close at the
screen after the show, and it was indeed silvered, but also with
regularly-spaced tiny holes...what is this for?<<

The only "position" that is really relevant here is the position of the head--if
you tilt your head to the left or right the polarization of the glasses will no
longer match the polarization of the light and the effect will be lost. The
holes in the screen have nothing to do with 3D. You'll find them in virtually
any motion picture theater screen. They are to let the sound through. (The
speakers are located behind the screen.)
 


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