Title:
OPTICAL SYSTEM, IMAGE CAPTURING DEVICE HAVING THE SAME, AND MANUFACTURING METHOD FOR SUCH OPTICAL SYSTEM
Document Type and Number:
Japanese Patent JP2015212821
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide: an optical system that offers a wide view angle, compactness, and high optical performance; an image capturing device having the same; and a manufacturing method for such an optical system.SOLUTION: An optical system comprises a front group having negative refractive power and a rear group, arranged in order from the object side along an optical axis, where the front group includes, in order from the object side along the optical axis, a first negative lens, a second negative lens, a positive lens, and a cemented lens comprising a plurality of lenses cemented together and where the rear group includes, in order from the object side along the optical axis, a positive lens and a negative lens. The optical system satisfies a predetermined condition.
Inventors:
SATO HARUO
TANAKA KAZUMASA
TANAKA KAZUMASA
Application Number:
JP2015085104A
Publication Date:
November 26, 2015
Filing Date:
April 17, 2015
Export Citation:
Assignee:
NIKON CORP
International Classes:
G02B13/04; G02B1/115; G02B13/18
Domestic Patent References:
| JP2009151078A | 2009-07-09 | |||
| JP2013083780A | 2013-05-09 | |||
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Attorney, Agent or Firm:
Yoshio Inoue
Kenichi Aihara
Ryuji Ito
Junko Inoue
Kenichi Aihara
Ryuji Ito
Junko Inoue