Projecting apparatus with spherical screen, more particularly fo

Details Projecting apparatus with spherical screen, more particularly fo Projecting apparatus with spherical screen, more particularly fo

1986-10-16

1989-08-22

Cuchlinski, Jr., William A.

Optics: image projectors

Cabinet encloses projector and one side of screen

353 84, 353 88, 353 79, G03B 2110

Patent

active

048590533

ABSTRACT:
A screen-forming sphere is made of a front translucent half-sphere and of a rear half-sphere which is opaque except in a central region. An image projector is situated behind the screen and has a front face comprising a platen mounted in front of the optic of the image projector. The platen contains a rotary polarization filter rotated by a first motor. The filter is occultable by a rotary flap mounted on spindles rigidly connected to two rotary vertically aligned disc members which rotate in synchronism under action of a second motor.

REFERENCES:
patent: 2292172 (1942-08-01), Stokes
patent: 2461756 (1949-02-01), Moore
patent: 2592444 (1952-04-01), Matelena
patent: 3205766 (1965-09-01), Ewald et al.
patent: 3586432 (1971-06-01), Pentes
patent: 4073576 (1978-02-01), Bastian

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