P3D Re: stereo pointer?

[Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Wed, 05 May 1999
>From: John Toeppen <toeppen@xxxxxxxx>
>.......
> A standard pointer is highly polarized so when rotated about
>its axis should appear in the left and right eyes twice with each
>rotation, same as rotating a polarizer. But who need to point out stuff
>on a projeccted stereo slide?
>

****  So the cross polarization is easy to obtain merely by rotating the two
pointers on the projection axis till the polarization angles are 90 degrees
from each other.

As to what to use if for...  

Pointing out a particular detail in a slide so an audience can keep up with
the speaker. It might take a few moments to pick out the same detail on
one's own, and so miss the next two comments while looking for the first.

Teaching about stereo mounting in a class on the subject. As described in
another post, an ordinary single pointer allows one to lock onto the
projection surface depth and by manipulating the projectors, set the window
(or other depth plane) in the image to be congruent with the screen surface.
That would be the ideal projection situation and the pointer makes it
possible to know precisely where the projectors are set.

A stereo pointer would allow the same sort of thing, without having to move
the projectors. I can imagine the pointer idea is far easier to manipulate
in the middle of a presentation.

Then there is the play aspect I've already commented on... and more I'm not
divulging at this moment.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://3dzine.simplenet.com/


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