FED polarization

[P3D Marvin Jones <Campfire@xxxxxxxxxxxxxx>]

Message text written by INTERNET:photo-3d@xxxxxxxxxxxxxxxxxxxxxxxx
>I recently won a box of old polarized glasses from the '50s, I believe,
from an auction. They are all mighty sturdy and come in decorative
little pouches. I set up my FED projector, and put in a slide. LUNCHBAG
LETDOWN!!! No stereo effect! Obviously, I thought, something was wrong
with the projector. I then put on a pair of the FED glasses, and
WOOOOAAAAHHHHHHHH!!! The person's foot in the picture leaped out and
almost kicked me in the face!!  My question to the group; do the
polarized lenses in the projector and the glasses have to match? Is that
why I'm not seeing the stereo effect with the older glasses?<

Certainly the lenses in the glasses and the projector have to match--that=
's
just common sense. Since the 1950s, almost all polaroid glasses have been=

set at a standard polarization angle--45 degrees and 135 degrees I believ=
e
it is. The only ones I've heard of that were non-standard were the ones
with the old Elmo Super-8 system, which used 0 degrees and 90 degrees. I
don't know anything about the Fed system, but it certainly sounds as thou=
gh
it is also non-standard. I think that's much more likely than the idea of=

all those glasses "losing" their polarity. You might want to look into
converting the polarizers in the projector so they match the vast majorit=
y
of available glasses.


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