Real image type viewfinder optical system

Details Real image type viewfinder optical system Real image type viewfinder optical system

1995-05-08

1997-04-29

Callahan, Timothy P.

Optical: systems and elements

Compound lens system

Telescope

359835, G03B 1308

Patent

active

056254865

ABSTRACT:
A real image type viewfinder optical system configured so as to allow observation, through an eyepiece, of an image of an object which is formed by an objective, and inverted by image inverting optical members in both a vertical direction and a horizontal direction. This viewfinder optical system uses an objective which is formed as a member integrated with a prism having a first reflecting surface of the image inverting optical members and an eyepiece which is formed as a member integrated with a prism having a final reflecting surface of the image inverting optical members.

REFERENCES:
patent: 4367949 (1983-01-01), Lavering
patent: 4795235 (1989-01-01), Spitzberg
patent: 5034763 (1991-07-01), Inabata
patent: 5130845 (1992-07-01), Ruben
patent: 5235460 (1993-08-01), Abe
patent: 5491528 (1996-02-01), Takato et al.

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