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Title:
VARIABLE POWER OPTICAL SYSTEM, OPTICAL DEVICE COMPRISING THE VARIABLE POWER OPTICAL SYSTEM, AND METHOD FOR PRODUCING VARIABLE POWER OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/081602
Kind Code:
A1
Abstract:
A variable power optical system (ZL), which is mounted in an optical device such as a single-lens reflex camera (1), comprises sequentially from the object side, a first lens group (G1) that has a positive refractive power, a second lens group (G2) that has a negative refractive power, a third lens group (G3) that has a positive refractive power, a fourth lens group (G4) that has a negative refractive power, a fifth lens group (G5) that has a positive refractive power and sixth lens group (G6) that has a negative refractive power. The variable power optical system (ZL) is configured such that at least some lenses in one lens group among the first to sixth lens groups (G1-G6) move so as to contain a component in the direction that is perpendicular to the optical axis. Consequently, there are provided: a variable power optical system wherein aberration fluctuation at the time when the power is varied is well suppressed; an optical device which comprises the variable power system; and a method for producing a variable power optical system.

Inventors:
ITO TOMOKI (JP)
Application Number:
PCT/JP2011/078870
Publication Date:
June 21, 2012
Filing Date:
December 14, 2011
Export Citation:
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Assignee:
NIKON CORP (JP)
ITO TOMOKI (JP)
International Classes:
G02B15/20
Foreign References:
JPH11174325A1999-07-02
JPH11223770A1999-08-17
JPH11237552A1999-08-31
JP2000047107A2000-02-18
Attorney, Agent or Firm:
INOUE, YOSHIO (JP)
Yoshio Inoue (JP)
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Claims: