P3D Re: Polarization methods

[fj834@xxxxxxxxxxxxxxxxxxxxx (Dr. George A. Themelis)]

Reply to message from emanon@xxxxxxxxxx of Wed, 10 Dec

>...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 is done, basically, is to put a polarizing filter onto each of the two
>film projectors.  Of course, obviously, the correct L / R filters have to
>be put onto the respective film projectors.

Excuse me?

I guess Marvin was right after all... You do have a little catching up to
do in the field of polarized stereo projection. 

There are polarized filters in the projector but you still need a "silver"
screen (not "polarized" screen, just a screen made of material that retains
the polarization of light).  And, of course, the audience must wear
polarized glasses.

That's the way it has been done for many years and this is how many of us
do it today.

Do you know of a better, less costly or more convenient way?

George Themelis


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