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Patent Searching and Data


Title:
LENS SYSTEM, IMAGE PICKUP DEVICE, MOBILE BODY, AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/207238
Kind Code:
A1
Abstract:
This lens system is provided with, in the following order from the object side to the image side, a first lens group having positive refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power. The first lens group includes, in the following order from the object side, a first sub-lens group having negative refractive power, a diaphragm, and a second sub-lens group having positive refractive power. The third lens group includes, a front group, which is disposed on the object side, and which has positive refractive power, and a rear group, which is disposed on the image side, and which has negative refractive power, said front group and rear group having therebetween an air interval that is largest in the third lens group. In focusing from infinity to close range, the first lens group and the third lens group are fixed, and the second lens group moves to the object side. When the focal point distance of the first lens group is represented by f1, and the focal point distance of the whole system in infinity is represented by fi, conditional expression of 1

Inventors:
CHEN Yonghua (Shinagawa Season Terrace 11F 1-2-70, Konan, Minato-k, Tokyo 75, 〒1080075, JP)
OHATA Atsushi (Shinagawa Season Terrace 11F 1-2-70, Konan, Minato-k, Tokyo 75, 〒1080075, JP)
MINATO Atsuo (Shinagawa Season Terrace 11F 1-2-70, Konan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
JP2017/017402
Publication Date:
November 15, 2018
Filing Date:
May 08, 2017
Export Citation:
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Assignee:
SZ DJI TECHNOLOGY CO., LTD (Shinagawa Season Terrace 11F, 1-2-70 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
International Classes:
G02B13/00; G02B13/18
Foreign References:
JPH0348807A1991-03-01
JP2013044964A2013-03-04
JP2006195068A2006-07-27
JPH11133304A1999-05-21
JPH03225307A1991-10-04
JP2016156941A2016-09-01
JP2016110007A2016-06-20
JPS55164806A1980-12-22
Attorney, Agent or Firm:
RYUKA IP LAW FIRM (22F Shinjuku L Tower, 1-6-1 Nishi-Shinjuku, Shinjuku-k, Tokyo 22, 〒1631522, JP)
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