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P3D Re: Projection problems



>I have finally joined the ranks of the stereo projector
>owners!  Yeah! :-)  

Congratulations Paul!

>I'm getting such extreme ghosting that the images are
>effectively unviewable.  The problem seems to be lack of
>(or insufficient) extinction in the right-eye view.  My
>initial reaction was that the right polarizer must be at
>fault.  But when I place a pair of polarized glasses in
>front of the projector lenses, the screen goes completely
>dark.  This suggests the polarizers in the projector must
>be OK, right?

To simplify things, pull out the polarizer assembly
(very easy: remove top, grab assembly with both hands
and pull straight up) and test each filter with one
side of the glasses.  Look at a bright light source
and see how much goes through.

It is hard to think of way that the screen will selectively 
depolarize one image.  

>I find that if I project
>one side at a time, the image on the screen is mostly still
>viewable with either eye, though one side is slightly dimmer
>than the other. 

Seems that you need new polarizers!

George Themelis


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