Title:
OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR MANUFACTURING OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/090050
Kind Code:
A1
Abstract:
Provided are: an optical system having favorable optical performance while reducing the size of a high magnification zoom lens; an optical device; and a method for manufacturing the optical system. This optical system OL, which is used in an optical device such as a camera 1, includes, in order from the object side: a first lens group G1 having a positive refractive power; a second lens group G2 having a negative refractive power; a middle group GM that is formed by one or two lens groups and has a positive refractive power; a focusing group GF that is a lens group having a negative refractive power, the focusing group moving in the optical direction during focusing; and a rear group GR formed by at least one lens group. During magnification from a wide-angle end state to a telephoto end state, the interval between adjacent lens groups changes, and a prescribed condition is satisfied.
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Inventors:
TOKUNAGA KYOYA (JP)
HARADA HIROKI (JP)
YAMAGUCHI SATOSHI (JP)
HARADA HIROKI (JP)
YAMAGUCHI SATOSHI (JP)
Application Number:
PCT/JP2022/039293
Publication Date:
May 25, 2023
Filing Date:
October 21, 2022
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| WO2018092297A1 | 2018-05-24 |
Foreign References:
| JP2015018124A | 2015-01-29 | |||
| JP2019211527A | 2019-12-12 | |||
| JP2020071439A | 2020-05-07 | |||
| JP2014126850A | 2014-07-07 |
Attorney, Agent or Firm:
HOSAKA Joyo (JP)
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