Apparatus for projection on a cylindrical screen

Details Apparatus for projection on a cylindrical screen Apparatus for projection on a cylindrical screen

1978-12-13

1980-11-25

Shepperd, John W.

Optics: image projectors

Target, map or navigation projection

353 98, 353 50, 353 81, 35 12N, G09B 906, G03B 2128

Patent

active

042355354

ABSTRACT:
The projector includes a housing with a projection path duct holding a dove prism and a mirror deflecting the path into a vertical axis. The beam in that path is intercepted by a tiltable mirror held in a rotatable disk. A transmission which includes bevel gearing, shafts and worm gears couples the tiltable mirror to a computer controlled motor for adjusting the elevation of the projection. Other transmission devices, including gears and worm gear, couple the disk to another motor to causing the projection beam to project in different horizontal directions. The projector is used to superimpose particular images upon a background image in a ship simulator.

REFERENCES:
patent: 1682163 (1928-08-01), Alder
patent: 1738942 (1929-12-01), Brenkert et al.
patent: 2548554 (1951-04-01), Nivison et al.
patent: 2966096 (1960-12-01), D'Incerti et al.
patent: 3845571 (1974-11-01), Hervieu
patent: 3951527 (1976-04-01), Blanz

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