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Title:
IMAGING LENS AND CAMERA DEVICE EQUIPPED WITH IMAGING LENS
Document Type and Number:
WIPO Patent Application WO/2019/187459
Kind Code:
A1
Abstract:
This imaging lens serves as a retrofocus optical imaging system, comprising, in order from the object side, a first lens group having a negative refractive power, a diaphragm, and a second lens group having a positive refractive power. The first lens group comprises, in order from the object side, a meniscus lens (first lens) having a negative refractive power with a convex surface facing the object side and a meniscus lens (second lens) having a negative refractive power with a convex surface facing the object side. The second lens group comprises, in order from the object side, a convex lens (third lens) having a positive refractive power, a biconvex lens (fourth lens) having a positive refractive power, a biconvex lens (fifth lens) having a positive refractive power, and a sixth lens having a negative refractive power, the fifth lens and the sixth lens being cemented to each other. The imaging lens has a 6-element, 5-group configuration for the first lens group and the second lens group.

Inventors:
SAOTOME, Takashi (6 Takeda Tobadono-cho Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
KANAI, Daisuke (6 Takeda Tobadono-cho Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
FUJII, Takaharu (6 Takeda Tobadono-cho Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
KIHARA, Satoru (6 Takeda Tobadono-cho Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
SUGIKI, Kousuke (6 Takeda Tobadono-cho Fushimi-ku, Kyoto-sh, Kyoto 01, 〒6128501, JP)
Application Number:
JP2018/048562
Publication Date:
October 03, 2019
Filing Date:
December 28, 2018
Export Citation:
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Assignee:
KYOCERA CORPORATION (6 Takeda Tobadono-cho, Fushimi-ku Kyoto-sh, Kyoto 01, 〒6128501, JP)
International Classes:
G02B13/04
Foreign References:
JP2014197131A2014-10-16
JP2012103319A2012-05-31
KR20100136832A2010-12-29
JP2009157279A2009-07-16
JP2012073296A2012-04-12
Attorney, Agent or Firm:
FUKAI, Toshikazu (OMM Bldg. 8th Floor, 7-31 Otemae 1-chome, Chuo-ku, Osaka-sh, Osaka 91, 〒5406591, JP)
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