[MF3D.FORUM:939] Re: MF Projectors

["Dr. George A. Themelis" <DrT-3d@xxxxxxx>]

>Efficient use of light is paramount in stereo projection because of the
>37.5% (3/8) transmission of typical projection polarizers and 75% (3/4)
>transmission of the viewing glasses. That means that 9/32 of the light
>gets to the eye compared to non stereo projection.

I would like to challenge these numbers :)  Where do they come
from?  In particular, I question the 75% cutoff of the viewing
glasses vs. only 37.5% of the projector polarizers.  It seems
to me that the projector polarizers will cut off more light
than the polarizing glasses for the simple reason that the
light is already polarized when it gets through the glasses.
Any thoughts on that?

George