Title:
IMAGING LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/092574
Kind Code:
A1
Abstract:
The present invention provides an imaging lens that exhibits little variation in the spherical aberration and astigmatism due to focusing, has a wide angle and a small F-number, and exhibits favorable optical performance, and an imaging device equipped with the imaging lens. The imaging lens includes, in order from an object, a first negative lens group that remains stationary during focusing, a diaphragm, and a second positive lens group that moves during focusing. The first lens group includes, in order from the object, a meniscus lens with the convex surface facing the object, a negative meniscus lens with the convex surface facing the object, a negative lens, a biconvex lens, a negative meniscus lens with the convex surface facing the object, and a positive lens with the convex surface facing the object. The imaging lens satisfies a prescribed conditional expression associated with a focal point distance f of the entire system, a focal point distance f1 of the first lens group, and the shape of the air lens between the first and second lenses in order from an image in the first lens group.
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Inventors:
KUNUGISE TAKASHI (JP)
Application Number:
PCT/JP2017/039192
Publication Date:
May 24, 2018
Filing Date:
October 30, 2017
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B13/04
Foreign References:
| JP2015152811A | 2015-08-24 | |||
| JP2016012034A | 2016-01-21 | |||
| JP2016180851A | 2016-10-13 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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