Zoom lens device

Details Zoom lens device Zoom lens device

1991-02-20

1992-08-18

Fields, Carolyn E.

Optical: systems and elements

Lens

With variable magnification

359696, 359700, G02B 1500

Patent

active

051404680

ABSTRACT:
A zoom lens device capable of performing magnification varying and focusing operations by moving part of an optical system. Magnification varying and focusing lens groups guided movably in an optical axis direction by two or more parallel guide shafts. One of the guide shafts is fixed such that it is located inside the extreme side end of a camera main body. Thus, the lens group of the zoom lens can be embedded in the camera main body so as to provide a compact camera. Also, the zoom lens can be assembled simply by inserting parts forming the zoom lens device over the guide shafts, which can improve the assembling of the zoom lens.

REFERENCES:
patent: 3663093 (1972-05-01), Iida
patent: 4054372 (1977-10-01), Schroeder
patent: 4472032 (1984-09-01), Kamata et al.
patent: 5016993 (1991-05-01), Akitake
patent: 5037187 (1991-08-01), Oda et al.

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