Apparatus for preflashing motion picture film

Details Apparatus for preflashing motion picture film Apparatus for preflashing motion picture film

1980-07-14

1981-11-03

Hayes, Monroe H.

Optics: motion pictures

Special effects

352 46, 352 72, 354202, G03B 2132

Patent

active

042982553

ABSTRACT:
An insert body is interposed between a film magazine and a motion picture camera, and is provided with a cavity containing a light source. An elongated opening in the body transmits light to preflash motion picture film passing from the film magazine into the motion picture camera. Controls on the quantity and quality of light are provided. In one form of control, a translucent cylindrical rod extends into the light source cavity and has an end face exposed to the light source. The translucent rod has an opaque lateral surface interrupted on one side by an axially extending light transmitting window. In another form of control, a window in the side of the translucent rod receives light from the light source. In a third form of control a cylindrical shell with opposed parallel windows takes the place of the translucent rod. In all cases, the translucent rod or shell has a head portion accessible exteriorly of the body for turning it to change the amount of light passing through the elongated opening.

REFERENCES:
patent: 4021831 (1977-05-01), Bercher
patent: 4172640 (1979-10-01), Land

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