[Tig] _Hugo_

peter_swinson at compuserve.com peter_swinson at compuserve.com
Mon Feb 27 16:32:35 GMT 2012

Bob Friesenhahn wrote
 I did see a nice demo of passive projection, but the demo used two 
projectors so that there would not be a loss of resolution, provided 
that the projector images were perfectly aligned.
I understood that in 3D mode, where one projector Is left eye, 
the other right, that “perfect alignment” was not essential.
I think I heard figures for example of Imax 3D that an error of several inches 
out of alignment was not noticeable in 3D. 
I guess this is because our eyes automatically re-converge for any small errors. 
Of course in 2D perfect alignment is essential.
It would be interesting to know what the maximum error is in 3D as I guess 
none of us have eyes that are 100% converged at rest on infinity and our 
eye muscles must always be making these small corrections.

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