P3D Project-or-View

[John Fairstein <jfairstein@xxxxxxx>]

I use my Project-or-View for casual tabletop 3D presentations.

Though Harry Poster and George Themelis go in from the bottom, I clean
the internal mirrors from the top by removing the upper mirror assembly.
Rinse the mirrors in distilled water with a little added dishwashing
detergent, then allow to drip dry. Gentle scrubbing with bare fingers
(skin is chamois) helps remove stubborn spots. Be very careful though,
older aluminized coatings are soft and susceptible to scratching.
Scratches, though not in the image plane, create flare and reduce
contrast

I replaced the broken projection screen with a piece of thin glass
backed with drafting vellum, a diffuse film available at architect
supply stores.


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