Title:
VARIABLE POWER OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR MANUFACTURING VARIABLE POWER OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/157903
Kind Code:
A1
Abstract:
This variable power optical system (ZL) has, 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 third lens group (G3) having a positive refractive power, a fourth lens group (G4) having a positive refractive power, a fifth lens group (G5), and a sixth lens group (G6), wherein, when the power is changed the intervals between adjacent lens groups change, and the optical system has a stop (S) disposed further to the image side than the second lens group (G2) and satisfies the following conditional expression. 0.10
Inventors:
MAKIDA AYUMU (JP)
ITO TOMOKI (JP)
MIWA SATOSHI (JP)
ITO TOMOKI (JP)
MIWA SATOSHI (JP)
Application Number:
PCT/JP2019/003358
Publication Date:
August 06, 2020
Filing Date:
January 31, 2019
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| WO2015146067A1 | 2015-10-01 |
Foreign References:
| JP2005242015A | 2005-09-08 | |||
| JP2011039560A | 2011-02-24 | |||
| JPH1048525A | 1998-02-20 | |||
| JP2014145960A | 2014-08-14 | |||
| JP5890065B2 | 2016-03-22 | |||
| JP2011209347A | 2011-10-20 | |||
| JP2011170086A | 2011-09-01 | |||
| JP2017161933A | 2017-09-14 | |||
| US20190004295A1 | 2019-01-03 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
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