Title:
VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND MANUFACTURING METHOD FOR VARIABLE MAGNIFICATION OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/194775
Kind Code:
A1
Abstract:
The present invention is configured by lens components including, in order from the object side; a first lens group G1 having a negative refractive power; a second lens group G2 having a positive refractive power; a third lens group G3 having a negative refractive power; and a rear group including at least one lens group and having a positive refractive power as a whole, wherein, when a magnification is varied, an air interval between the adjacent lens groups changes such that the first lens group G1 has a negative refractive power. Thus, a variable magnification optical system and an optical device having excellent optical performance, and a manufacturing method for the variable magnification optical system are provided.
Inventors:
UEHARA TAKERU (JP)
SUZUKI TAKESHI (JP)
MACHIDA KOSUKE (JP)
SUZUKI TAKESHI (JP)
MACHIDA KOSUKE (JP)
Application Number:
PCT/JP2016/065604
Publication Date:
December 08, 2016
Filing Date:
May 26, 2016
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/20; G02B13/18
Foreign References:
| JP2007094169A | 2007-04-12 | |||
| JP2005049843A | 2005-02-24 | |||
| JPH07287168A | 1995-10-31 | |||
| JP2009199092A | 2009-09-03 | |||
| JP2008052174A | 2008-03-06 | |||
| JP2006301393A | 2006-11-02 | |||
| JP2012063661A | 2012-03-29 |
Attorney, Agent or Firm:
INOUE, Yoshio et al. (JP)
Yoshio Inoue (JP)
Yoshio Inoue (JP)
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