T3D Re: T3D Re: Rear Projection Stereo

[Jim Crowell <crowell@xxxxxxxxxxxxxxx>]

At 2:10 PM -0700 1/20/98, John Bercovitz wrote:
>
>If you use a shift projection lens (Zeiss makes 'em for 6x6 format),
>you can put your projector way up high and then instead of tilting
>the projector down to put the image on screen, you shift the lens
>down keeping it level, until the image is on the screen.  Gets rid
>of projection keystoning.
>
>John B

Oh I see.  So the light still comes down at a very oblique angle, but
there's no distortion.  Would there be a brightness gradient?

-Jim C.

----------------------
Jim Crowell
Division of Biology
216-76
Caltech
Pasadena, CA
(818) 395-8337
jim@xxxxxxxxxxxxxxx



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