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Patent Searching and Data


Title:
IMAGING LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/168557
Kind Code:
A1
Abstract:
The present invention provides an imaging lens which has a small curvature of image and favorable optical performance and is capable of suppressing the variation in astigmatism when focusing with the lens, and an imaging device equipped with the imaging lens. The imaging lens includes, in order from the object, a first positive lens group that moves toward an object when a focus distance changes from a long distance to a short distance, and a second lens group that is stationary during focusing. The first lens group includes a first B sub lens group and the first B sub lens group includes, in order from the object, a positive b1 lens a negative b2 lens with the concave surface facing an image, an aperture stop, a negative b3 lens with the concave surface facing the object, and a positive b4 lens. The second lens group includes a negative lens, a positive lens, and a negative lens in order from the object. The imaging lens satisfies a prescribed conditional expression.

Inventors:
OKADA KAZUYOSHI (JP)
Application Number:
PCT/JP2018/008425
Publication Date:
September 20, 2018
Filing Date:
March 05, 2018
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B13/00
Foreign References:
JP2013210604A2013-10-10
JP2012155223A2012-08-16
JP2013130724A2013-07-04
JP2013178365A2013-09-09
JP2013231941A2013-11-14
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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