P3D Re: stereo laser pointer

[Tom Hubin <thubin@xxxxxxxxx>]

Dr. George A. Themelis wrote:
> 
> >I have to ask: just what makes a laser pointer stereo or flat?
> >Please forgive my ignorance and inexperience.
> 
> I have no patience with any of these two "defects" but will still
> try and answer... If you can control the depth with respect to
> the screen that the point is pointing, then you have a stereo
> pointer.  Otherwise it is flat.
> 
> George

Hello George,

Now that would be interesting. Building it would be easy since laser
pointers are usually linearly polarized anyway. A pair of pointers
strapped to a clothspin would do it. One for the right image point and
the other for the left image point. 

A more practical question is how you would use it. The person doing the
pointing would need to point at the subject with the pair of pointers
while controlling the angle seperating the two pointers and while not
rotating the pointers.

Is this a fantasy or have you actually seen it done somewhere? Why not
just point to the right eye view and let the viewers brain see what it
wants to see?

Tom Hubin
thubin@xxxxxxxxx


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