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1. (US20180275381) ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME

Office : United States of America
Application Number: 15717804 Application Date: 27.09.2017
Publication Number: 20180275381 Publication Date: 27.09.2018
Publication Kind : A1
IPC:
G02B 15/163
G02B 27/64
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15
Optical objectives with means for varying the magnification
14
by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
16
with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
163
having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27
Other optical systems; Other optical apparatus
64
Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
CPC:
G02B 15/163
G02B 27/646
Applicants: OLYMPUS CORPORATION
Inventors: Kazuteru KAWAMURA
Priority Data:
Title: (EN) ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME
Abstract: front page image
(EN)

A zoom lens includes in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a rear-side lens unit, and an aperture stop. The second lens unit includes a first sub-unit having a negative refractive power and a second sub-unit having a negative refractive power, and the rear-side lens unit includes a third lens unit having a positive refractive power which is disposed nearest to object. The first lens unit includes at least a negative lens and a positive lens and the first sub-unit includes at least a negative lens and a positive lens. The third lens unit includes at least two lens components having a positive refractive power, and the following conditional expressions (1) and (2) are satisfied:


61≤νd1G_max_p  (1), and


−0.03≤Tp2Ga_min_p≤0.0165  (2).