Finder optical system

Details Finder optical system Finder optical system

1991-04-02

1993-03-16

Gellner, Michael L.

Optical: systems and elements

Prism

With reflecting surface

359643, G03B 1310

Patent

active

051948869

ABSTRACT:
In a finder optical system provided separately from a taking lens system, an objective lens system forms a primary image which is an inverted image of a subject, a relay lens system erects the primary image formed by the objective lens system to form a secondary image which is an erecting image and can change the size of the secondary image, and an ocular enlarges the secondary image formed by the relay lens system and can change the enlargement ratio.
The finder optical system is useful for a camera constituting the trimming system.

REFERENCES:
patent: 3438689 (1969-04-01), Wehr
patent: 4652104 (1987-03-01), Harvey
patent: 4909614 (1990-03-01), Itoh et al.
patent: 4955715 (1990-09-01), Kitagishi
patent: 4964686 (1990-10-01), Kato
patent: 5014078 (1991-05-01), Kudo et al.
patent: 5055868 (1991-10-01), Itoh et al.

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