Title:
A variable power optical system, an optical apparatus, a manufacturing method of a variable power optical system
Document Type and Number:
Japanese Patent JP5915261
Kind Code:
B2
Abstract:
A compact zooming optical system having high zooming ratio and superb optical performance and a manufacturing method are provided. The zooming optical system includes, in order from an object along the optical axis, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group having negative refractive power. Upon zooming from a wide angle end state to a telephoto end state, respective distances between the first lens group and the second lens group, between the second lens group and the third lens group, between the third lens group and the fourth lens group, and between the fourth lens group and the fifth lens group, are varied.
Inventors:
Akihiko Obama
Application Number:
JP2012043840A
Publication Date:
May 11, 2016
Filing Date:
February 29, 2012
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP2006184430A | ||||
| JP63205628A | ||||
| JP10186234A | ||||
| JP1252915A | ||||
| JP2011247963A | ||||
| JP2004170697A |
Attorney, Agent or Firm:
Yoshio Inoue
Kenichi Aihara
Ryuji Ito
Junko Inoue
Kenichi Aihara
Ryuji Ito
Junko Inoue