Finder optical system

Details Finder optical system Finder optical system

1992-11-30

1993-09-14

Gray, David M.

3542891, G03B 1302

Patent

active

052453758

ABSTRACT:
In a finder optical system wherein a field frame and a field lens are placed near an objective lens and a real image plane made by the objective lens and a prism having a reflecting surface is disposed between the field frame and an eyepiece, a transmitting surface substantially perpendicular to the optical axis of reflected light reflected by the reflecting surface of the prism is provided on the reflecting surface of the prism or by cutting away the reflecting surface, and an information display system for displaying desired information through that transmitting surface is provided. The information display system is provided at a position optically symmetrical with the field frame.

REFERENCES:
patent: 4833494 (1989-05-01), Ohsawa

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