Measuring and control system for single lens reflex

Details Measuring and control system for single lens reflex Measuring and control system for single lens reflex

1977-06-21

1978-10-03

Gellner, Michael L.

354 56, G03B 1720

Patent

active

041187180

ABSTRACT:
The exposure measuring system for single-lens reflex cameras, in which system the light passing through the objective lens is conveyed to the view finder eyepiece via a view finder reflex mirror, is provided with an additional mirror in the optical path of the camera, which additional mirror is partly translucent. A photo electric cell is pivotally mounted in order to be movable by linkage coupled with the reflex-mirror so that in one position during image viewing the cell receives light from the reflex mirror for light measurement and in another position during film exposure the cell receives light from the additional mirror for controlling exposure time.

REFERENCES:
patent: 3465660 (1969-09-01), Trankner et al.
patent: 3638548 (1972-02-01), Kurihara
patent: 3872484 (1975-03-01), Hashimoto et al.
patent: 3884584 (1975-05-01), Tsunekawa
patent: 3936159 (1976-02-01), Pavenick

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