Viewfinder device for displaying photographic information relati

Details Viewfinder device for displaying photographic information relati Viewfinder device for displaying photographic information relati

1996-12-30

2000-04-18

Blankenship, Howard B.

Photography

Having camera indicator

Having display in viewfinder

396378, G03B 1720

Patent

active

060525401

ABSTRACT:
A viewfinder device includes an objective lens, a hologram disposed in a place other than a prescribed image plane of the objective lens and a plane conjugate to the prescribed image plane, and an illumination device for illuminating the hologram. The position of a virtual image formed by the hologram is arranged to coincide with the prescribed image plane or the plane conjugate to the prescribed image plane, so that displays can be made in an adequate state within the visual field of a viewfinder.

REFERENCES:
patent: 4200380 (1980-04-01), Sato et al.
patent: 4576458 (1986-03-01), Cho et al.
patent: 5255030 (1993-10-01), Mukai et al.
patent: 5552845 (1996-09-01), Nagao et al.

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