Indicator device within the viewfinder of a camera

Details Indicator device within the viewfinder of a camera Indicator device within the viewfinder of a camera

1981-06-04

1982-10-19

Griffin, Donald A.

354198, G03B 1700, G03B 1302

Patent

active

043547540

ABSTRACT:
This specification discloses an indicator device within the viewfinder of a camera for indicating a predetermined range substantially centrally of the viewfinder field frame. The indicator device comprises at least one electro-optical element for indicating the predetermined range, the optical characteristic of the electro-optical element being variable by an electrical signal information, an information circuit for putting out photographing information, and a control circuit for producing an electrical signal information corresponding to the output of the information circuit and varying the optical characteristic of the electro-optical element.

REFERENCES:
patent: 3357328 (1967-12-01), Kinder et al.
patent: 3727530 (1973-04-01), Aoki
patent: 4104651 (1978-08-01), Matsumoto et al.
patent: 4140378 (1979-02-01), Suzuki et al.
patent: 4208115 (1980-06-01), Proske

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