Light shielding device in single lens reflex camera

Details Light shielding device in single lens reflex camera Light shielding device in single lens reflex camera

1982-10-25

1985-02-12

Gonzales, John

354479, G03B 1912

Patent

active

044987501

ABSTRACT:
A reflex mirror for reflecting light from an objective lens to a penta prism is provided with a light-permeable portion for conducting part of the light to behind the reflex mirror and with a shutter plate for shielding this light-permeable portion. When the reflex mirror reaches an exposing position after being moved from a viewing position, the shutter plate comes into engagement with a member and it takes a light-shielding position. This member is made adjustable in position, thereby enabling achievement of an accurate light-shielding position of the permeable portion by the shutter plate when the reflex mirror is in the exposing position.

REFERENCES:
patent: 3280714 (1966-10-01), Gunther et al.
patent: 3332331 (1967-07-01), Mandler
patent: 3540364 (1970-11-01), Ono
patent: 4342508 (1982-08-01), Haraguchi

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