Field flattener lens element assembly

Details Field flattener lens element assembly Field flattener lens element assembly

1981-08-06

1982-12-28

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With continuous feed and intermittent film arresting means

G03B 100

Patent

active

043658776

ABSTRACT:
A film support element assembly is disclosed, primarily for supporting film in relation to a projection aperture in a motion picture projector having a rolling loop film transport mechanism. In a preferred embodiment the film support element is a so-called "field flattener" and has a cylindrically curved surface over which successive frames in the film are laid by the mechanism. Wiper elements are provided above and below the film path and the lens element can be displaced to bring a fresh portion of the surface into the film path. At the same time, the wiper elements remove debris from the surface. The wiper elements are removable for disposal of collected debris.

REFERENCES:
patent: 3494524 (1970-02-01), Jones
patent: 3600073 (1971-08-01), Shaw
patent: 3794415 (1974-02-01), Jones
patent: 3944349 (1976-03-01), Jones
patent: 4039256 (1977-08-01), Teeple et al.
patent: 4114996 (1978-09-01), Shaw

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