Exposure ascertaining device for cameras

Details Exposure ascertaining device for cameras Exposure ascertaining device for cameras

1983-02-18

1984-07-24

Gellner, Michael L.

354465, 354477, G03B 7099, G03B 1718

Patent

active

044615590

ABSTRACT:
An exposure ascertaining device for cameras in which the movement of a movable member adapted to be moved when the film is exposed is ascertained on the basis of an output from a photoelectric element disposed in a position where said photoelectric element can receive the incident light advancing toward a film-set side of the camera. The photoelectric element is provided on the movable member, or disposed in a position where it can receive that part of the incident light which does not enter the image forming part of the surface of a film.

REFERENCES:
patent: 3690241 (1972-09-01), Nomura
patent: 3699864 (1972-10-01), Shimomura
patent: 3872484 (1975-03-01), Hashimoto et al.
patent: 4172643 (1979-10-01), Schulz et al.

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