Re: 3D test on Channel 4


"Graham." <me@xxxxxxxxxxx> wrote in message
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"Brian Gaff" <briang1@xxxxxxxxxxxxxxxx> wrote in message
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How were they doing it hough? I can recall those.. was it nintendo..
games with fast switching lcd glasses which gave everyone a headache.

It sound to me from what people are saying that this is a similar system
as was used in the early 80's for a week or so, with the two pictures
displaced
laterally much like a static convergence error and coloured spectacle
lenses used to
separate them.
This is a very unnatural way to view, because your eyes have to learn to
diverge
slightly, quite literally causing eye muscle strain. I am sure I read at
the time a
suggestion that permanent damage could result, perhaps to children's
developing
eyes, intuitively I would suspect this is a real issue.

--
Graham.

%Profound_observation%

Don't worry. The separation of the two complementary coloured images
(red-cyan or whatever) has to be adjusted at source to ensure that the
viewer's eyes are focused and converged at a comfortable distance. This is
usually arranged so that the image of the nearest object in the scene is at
or just behind the apparent window defined by the TV screen-surround. The
image displacement is not quite like a static convergence error, the
separation being a function of distance within the image. Also, since the
coloured specs have no optical power, there is no danger of mis-convergence
from the specs themselves.

TrevM


.

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