ZOOM LENS AND OPTICAL INSTRUMENT

Title:

ZOOM LENS AND OPTICAL INSTRUMENT

Document Type and Number:

WIPO Patent Application WO/2017/134929

Kind Code:

A1

Abstract:

A zoom lens according to the present disclosure is composed of a first lens group that has positive refractive power, a second lens group, a third lens group, a fourth lens group, a fifth lens group, and a sixth lens group. The first lens group includes: a front-side first lens group that is fixed with respect to an image plane during zooming from a wide-angle end to a telephoto end and during focusing from an object at infinity to a short-distance object; and a rear-side first lens group that has positive refractive power. The second lens group, the third lens group, and the fifth lens group move along the optical axis during zooming. The fourth lens group and the sixth lens group are fixed in the optical axis direction with respect to the image plane during zooming. At least two lens groups including the rear-side first lens group move along the optical axis during focusing.

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Inventors:

MIYAGAWA NAOKI (JP)
CHEN YONGHUA (JP)

Application Number:

PCT/JP2016/086674

Publication Date:

August 10, 2017

Filing Date:

December 09, 2016

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Assignee:

SONY CORP (JP)

International Classes:

G02B15/20; G02B13/18

Foreign References:

JP2011175185A	2011-09-08
JP2012098592A	2012-05-24
JPH1172705A	1999-03-16
JP2012108244A	2012-06-07
JP2011197471A	2011-10-06

Attorney, Agent or Firm:

TSUBASA PATENT PROFESSIONAL CORPORATION (JP)

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