Title:
ZOOM LENS, OPTICAL DEVICE, AND METHOD FOR PRODUCING ZOOM LENS
Document Type and Number:
WIPO Patent Application WO/2015/016031
Kind Code:
A1
Abstract:
This zoom lens comprises, 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 fourth lens group (G4) having a positive refractive power. When the magnification is varied, the distance between the first lens group (G1) and the second lens group (G2), the distance between the second lens group (G2) and the third lens group (G3), and the distance between the third lens group (G3) and the fourth lens group (G4) are varied. The second lens group (G2) includes, in order from the object side: a front-side lens group (G2F); an aperture stop (S); and a rear-side lens group (G2R). The front-side lens group (G2F) and the rear-side lens group (G2R) each have at least one negative lens. At least some of the lenses in the second lens group (G2) move as a movable group so as to include a component in a direction orthogonal to the optical axis. Thus, this zoom lens can be provided with high optical performance.
Inventors:
UMEDA TAKESHI (JP)
FUJIMOTO MAKOTO (JP)
FUJIMOTO MAKOTO (JP)
Application Number:
PCT/JP2014/068447
Publication Date:
February 05, 2015
Filing Date:
July 10, 2014
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| WO2012086153A1 | 2012-06-28 |
Foreign References:
| JPH0392808A | 1991-04-18 | |||
| JP2002107627A | 2002-04-10 | |||
| JP2013015778A | 2013-01-24 | |||
| JP2013182054A | 2013-09-12 |
Attorney, Agent or Firm:
INOUE, Yoshio et al. (JP)
Yoshio Inoue (JP)
Yoshio Inoue (JP)
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