Title:
変倍光学系、光学装置
Document Type and Number:
Japanese Patent JP6669169
Kind Code:
B2
Abstract:
A variable magnification optical system comprising, in order from an object side, a first lens group G1 having negative refractive power, a second lens group G2 having positive refractive power, a third lens group G3 having negative refractive power and a rear group comprising at least one lens group and having positive refractive power as a whole; upon varying magnification, air intervals between the neighboring lens groups being varied; and said first lens group G1 consisting of lens component(s) having negative refractive power, thereby a variable magnification optical system having excellent optical performance, an optical apparatus and a method for manufacturing the variable magnification optical system, being provided.
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Inventors:
Ken Uehara
Takeshi Suzuki
Kosuke Machida
Takeshi Suzuki
Kosuke Machida
Application Number:
JP2017521882A
Publication Date:
March 18, 2020
Filing Date:
May 26, 2016
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP2001249275A | ||||
| JP2004246043A | ||||
| JP2007072263A | ||||
| JP2009216941A | ||||
| JP2011069962A | ||||
| JP2015079229A | ||||
| JP2015222333A | ||||
| JP2007094169A | ||||
| JP2005049843A | ||||
| JP7287168A | ||||
| JP2009199092A | ||||
| JP2008052174A | ||||
| JP2006301393A | ||||
| JP2012063661A |
Foreign References:
| WO2011062076A1 |
Attorney, Agent or Firm:
Inoue International Patent and Trademark Office
Yoshio Inoue
Kenichi Aihara
Ryuji Ito
Junko Inoue
Yoshio Inoue
Kenichi Aihara
Ryuji Ito
Junko Inoue