Re: [Phys-l] A geek's observations on "Avatar"

[Brian Whatcott <betwys1@sbcglobal.net>]

Leigh Palmer wrote:
> Have you seen 3D postcards? They can be viewed through a narrow 
> acceptance angle like the TV you describe. If you examine them closely 
> you will find an array (I'm tempted to say "grating") of vertical 
> cylindrical lenses cemented over the picture. The picture itself is 
> made up of two pictures, a stereo pair, printed in a manner similar to 
> the old fashioned TV raster tuned sideways. /snip/
> Leigh
>
> (Not proofread - sorry. I apologize in advance, since it's late.)
>   
Leigh's note reminds me that I tossed out a 3-D camera in its original 
box a week or two ago, that my wife brought for me as a curio, some time 
ago.
It seemed to be in 35 mm format, and had four lenses. It took half the 
customary number of shots, and the film was to be turned in to a 
specific  processing center. I believe that they were using the 
lenticular presentation he describes here.

Brian W