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Patent Searching and Data


Title:
OPTICAL IMAGING SYSTEM, IMAGE CAPTURING DEVICE, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/142628
Kind Code:
A1
Abstract:
An optical imaging system for infrared imaging, sequentially comprising, from the object side to the image side along the optical axis: a first lens (L1) having refractive power; a second lens (L2) having refractive power; a third lens (L3) having positive refractive power, the image side surface of the third lens (L3) being convex at the circumference; a fourth lens (L4) having negative refractive power; and a fifth lens (L5) having positive refractive power, the image side surface (S10) of the fifth lens being concave at the optical axis, the object side surface (S9) and the image side surface (S10) of the fifth lens being both aspherical, and at least one of the object side surface (S9) and the image side surface (S10) comprising at least one inflection point. The optical imaging system satisfies the following relation: TT/f<1.5, wherein TT is the distance from the object side surface (S1) of the first lens to the image side surface (S10) of the fifth lens on the optical axis, and f is the effective focal length of the optical imaging system. The optical imaging system can capture images of high resolution, and has the characteristics of large aperture and small size. Also disclosed are an image capturing device and an electronic device.

Inventors:
ZOU JINHUA (CN)
LIU BINBIN (CN)
XIE HAN (CN)
Application Number:
PCT/CN2020/072054
Publication Date:
July 22, 2021
Filing Date:
January 14, 2020
Export Citation:
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Assignee:
NANCHANG OUFEI PREC OPTICAL PRODUCT CO LTD (CN)
International Classes:
G02B13/00; G02B9/64; G02B11/34; G02B13/18
Foreign References:
CN206115009U2017-04-19
CN206115009U2017-04-19
CN208569163U2019-03-01
CN208569163U2019-03-01
CN110133829A2019-08-16
CN110133829A2019-08-16
CN107621688A2018-01-23
US20160161722A12016-06-09
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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