Real image type vari-focal viewfinder

Details Real image type vari-focal viewfinder Real image type vari-focal viewfinder

1990-07-26

1992-09-15

Arnold, Bruce Y.

Optical: systems and elements

Compound lens system

Variable magnification

359433, 359689, 359557, G02B 2314, G02B 1514

Patent

active

051483084

ABSTRACT:
A real image type vari-focal viewfinder comprising an objective lens system consisting of a plurality of lens components and functioning to form a real image, and an eyepiece lens system, adapted so as to vary focal length thereof by moving at least one of the lens units arranged in the objective lens system, and adapted so as to correct parallax by placing said at least one of the lens units or one of the lens components arranged in said at least one of the lens units in a condition eccentric or inclined with regard to the optical axis.

REFERENCES:
patent: 4842395 (1989-06-01), Sato et al.
patent: 4887109 (1989-12-01), Fujita et al.

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