Variable power view finder

Details Variable power view finder Variable power view finder

1992-11-25

1995-04-25

Sikes, William L.

Optical: systems and elements

Compound lens system

Telescope

359432, 359646, 359717, 354222, G02B 1318, G02B 1514, G02B 2314, G02B 1302

Patent

active

054104300

ABSTRACT:
A real image type of variable power view finder is disclosed which has an objective lens system, an image erecting optical system, and an eyepiece lens system, located in this order as viewed from an object to be photographed. The objective lens system includes negative and positive lens groups located in this order from the object side, so as to vary the distance therebetween, to change the magnification. The negative lens group of the objective lens system has at least two negative lenses.

REFERENCES:
patent: 3778133 (1973-12-01), Tatian
patent: 4109995 (1978-07-01), Betensky
patent: 4212526 (1980-07-01), Yamazaki et al.
patent: 4265529 (1981-05-01), Yokota
patent: 4427268 (1984-01-01), Ikemori
patent: 4592636 (1986-06-01), Kato et al.
patent: 4614409 (1986-09-01), Sakai
patent: 4725130 (1988-02-01), Ozawa
patent: 4733953 (1988-03-01), Yamamoto et al.
patent: 4779969 (1988-10-01), Sato et al.
patent: 4812023 (1989-03-01), Kikuchi
patent: 4842395 (1989-06-01), Sato et al.
patent: 4854680 (1989-08-01), Kikuchi
patent: 4909614 (1990-03-01), Itoh et al.
patent: 4910545 (1990-03-01), Fujibayashi et al.
patent: 4981344 (1991-01-01), Ueda
patent: 4992809 (1991-02-01), Nozaki et al.
patent: 5004329 (1991-04-01), Tsuchida
patent: 5034763 (1991-07-01), Inabata
patent: 5052787 (1991-10-01), Sugawara
patent: 5086353 (1992-02-01), Mukai et al.
patent: 5095326 (1992-03-01), Nozaki et al.
patent: 5136427 (1992-08-01), Sugawara
patent: 5166830 (1992-11-01), Ishibai et al.

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