Title:
VARIABLE POWER OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING VARIABLE POWER OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/094663
Kind Code:
A1
Abstract:
This variable power optical system (ZL) is configured so as to have the following arranged in order from the object side: a first lens group (G1) having a positive refractive power; an intermediate group (GM) having at least one lens group and having an overall negative refractive power; an intermediate-side lens group (GRP1) having a positive refractive power; a successive-side lens group (GRP2) having a positive refractive power; and a successive group (GR) configured from at least one lens group. When focusing, the successive-side lens group (GRP2) moves. The successive-side lens group (GRP2) has at least two lenses, and satisfies the following conditional expression: 0.2
Inventors:
MACHIDA KOSUKE (JP)
Application Number:
PCT/JP2016/085193
Publication Date:
June 08, 2017
Filing Date:
November 28, 2016
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/20
Domestic Patent References:
| WO2014155463A1 | 2014-10-02 |
Foreign References:
| JPH07306363A | 1995-11-21 | |||
| JP2013044815A | 2013-03-04 | |||
| JP2003287680A | 2003-10-10 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
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