Title:
VARIABLE POWER OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING VARIABLE POWER OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/094662
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. Furthermore, the following conditional expression is satisfied: 2.5
Inventors:
MACHIDA KOSUKE (JP)
Application Number:
PCT/JP2016/085192
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 | |||
| WO2014017025A1 | 2014-01-30 |
Foreign References:
| JP2013218299A | 2013-10-24 | |||
| JP2011085909A | 2011-04-28 | |||
| JP2014102462A | 2014-06-05 | |||
| JPH07151975A | 1995-06-16 | |||
| JP2015102803A | 2015-06-04 | |||
| JP2011017912A | 2011-01-27 | |||
| JP2003287680A | 2003-10-10 | |||
| JP2008176231A | 2008-07-31 | |||
| JP2010197481A | 2010-09-09 | |||
| JP2014106391A | 2014-06-09 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
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