Real image mode finder optical system

Details Real image mode finder optical system Real image mode finder optical system

1991-05-13

1993-04-27

Gellner, Michael L.

Optical: systems and elements

Prism

With reflecting surface

359833, G03B 1302

Patent

active

052066754

ABSTRACT:
A real image mode finder optical system includes an objective lens, an image inverting optical member erecting an image of an object formed by the objective lens, and an eyepiece for observing the object image, in which the last reflecting surface of the image inverting optical member is constructed, as a prism, integral with the eyepiece. Whereby, the real image mode finder optical system has practically important advantages that the overall length can be reduced, with performance maintained, without any increase of the number of parts and the image inverting optical member can also be arranged at the rear end of the camera body.

REFERENCES:
patent: 4751539 (1988-06-01), Yamada et al.
patent: 4842395 (1989-06-01), Sato et al.

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