Motion picture optical system

Details Motion picture optical system Motion picture optical system

1976-12-13

1979-05-01

Hayes, Monroe H.

Optics: motion pictures

Optical rectifier type

Rotating reflector disc

G03B 4106

Patent

active

041520521

ABSTRACT:
A system for the intermittent immobilization of motion picture images on a continuously moving film strip passing through a film gate. The image path of the system includes a ring-shaped optical element rotatably driven about its central axis. Rotation of this "optical cam" is synchronized with the continuous feed motion of the film strip through the film gate so as to cause the image to be immobilized for the period of the cam's rotation, after which the cycle is repeated. Three fixed optical elements comprising a film gate corrector, an aperture corrector, and a focal plane corrector are interposed in the image path for compensation of optical aberrations caused by the variation of optical cam scan angle and tangential slope over the intercepted area of the optical aperture, and by the compound "Euler" angle changes with optical cam rotation.

REFERENCES:
patent: 1421523 (1922-07-01), Mechau
patent: 3556647 (1971-01-01), Brandon

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