Viewfinder unit in a camera

Details Viewfinder unit in a camera Viewfinder unit in a camera

1994-07-19

1996-12-03

Gellner, Michael L.

Photography

Having camera indicator

Having display in viewfinder

396384, 396386, G03B 1302, G03B 1700

Patent

active

055813186

ABSTRACT:
A viewfinder unit in a camera has a viewfinder objective optical system that contributes to formation of an object image. The camera viewfinder unit comprises an inversion optical system composed of a first prism and a second prism both providing an object image formed in the vicinity of a field mask by a viewfinder objective optical system in the form of a correct image and then guiding the object image to an eyepiece lens, a center of a first reflector plane of the second prism associated with a center of a viewfinder field and a periphery of the first reflector plane thereof associated with an outside of the viewfinder field, each of which is made by coating the first reflector plane with a translucent half mirror, and an LCD located at a position dependent on the first reflector plane of the second prism, which is optically equivalent to a position of image formation in a viewfinder objective optical system, opposed to the center and periphery of the first reflector surface, and designed to display viewfinder information.

REFERENCES:
patent: 4465355 (1984-08-01), Murakami et al.
patent: 4519685 (1985-05-01), Momiyama et al.
patent: 5019854 (1991-05-01), Mukai et al.
patent: 5170204 (1992-12-01), Mukai et al.
patent: 5245375 (1993-09-01), Ohshita

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