Patents by Inventor Liefeng Zhao

Liefeng Zhao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11656436
    Abstract: The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power; a second lens having refractive power; a third lens having negative refractive power; a fourth lens having refractive power with a convex object-side surface and a concave image-side surface; a fifth lens having refractive power; and a sixth lens having negative refractive power. Half of a maximal field-of-view Semi-FOV of the optical imaging system satisfies Semi-FOV<15°. A distance TTL along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging system, half of a diagonal length ImgH of an effective pixel area on the imaging plane and an effective focal length f of the optical imaging system satisfy 1.9 mm<TTL*ImgH/f<2.7 mm.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: May 23, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Xue Gao, Jianke Wenren, Fujian Dai, Liefeng Zhao
  • Patent number: 11656433
    Abstract: The present disclosure provides an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power; a second lens having refractive power; and a third lens having refractive power. A center thickness CT1 of the first lens along the optical axis and a maximum effective radius DT11 of an object-side surface of the first lens satisfy: 1.0<CT1/DT11<2.0.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: May 23, 2023
    Inventors: Xiaobin Zhang, Jianke Wenren, Liefeng Zhao, Fujian Dai
  • Patent number: 11656437
    Abstract: The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens having negative refractive power with a convex object-side surface; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power; and a sixth lens having positive refractive power. A maximum field-of-view FOV of the optical imaging system and a distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging system satisfy tan(FOV/2)/TTL>1.0 mm?1. A center thickness CT1 of the first lens along the optical axis and a center thickness CT4 of the fourth lens along the optical axis satisfy 0.9?CT1/CT4<1.5.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: May 23, 2023
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD.
    Inventors: Qiqi Lou, Fujian Dai, Liefeng Zhao
  • Patent number: 11656444
    Abstract: A zoom lens group, sequentially from an object side to an image side along an optical axis, including a first lens group; a second lens group; a third lens group having positive refractive power; and a fourth lens group having negative refractive power. The zoom lens group continuously zooms by changing positions of the second lens group, the third lens group, and the fourth lens group along the optical axis. A distance TTL from an object-side surface of a lens in the first lens group closest to the object side to an imaging plane of the zoom lens group along the optical axis, and a total effective focal length fw of the zoom lens group in a wide-angle state satisfy: 2.0<TTL/fw<3.0.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: May 23, 2023
    Inventors: Jianke Wenren, Fujian Dai, Liefeng Zhao
  • Patent number: 11644653
    Abstract: The present disclosure discloses an optical imaging lens assembly and an electronic device. The optical imaging lens assembly includes, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens and at least two subsequent lenses. A distance TTL along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly and a total effective focal length f of the optical imaging lens assembly satisfy TTL/f<1. An optical part of at least one of the lenses included in the optical imaging lens assembly is trimmed in a Y-axis direction, and a maximum effective radius DY along the Y-axis of the trimmed lens and a maximum effective radius DX along a X-axis of the trimmed lens satisfy 0.5<DY/DX<1.0, wherein the X-axis is perpendicular to the Y-axis.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: May 9, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Lin Huang, Fujian Dai, Liefeng Zhao
  • Patent number: 11635590
    Abstract: The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens having a negative refractive power with a concave object-side surface and a concave image-side surface; a second lens having a refractive power; a third lens having a negative refractive power; a fourth lens having a refractive power with a concave object-side surface, and a convex image-side surface; and a fifth lens having a refractive power. An effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy ?2.3?f1/f2<?1.5.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: April 25, 2023
    Inventors: Yanping Li, Lingbo He, Jianke Wenren, Fujian Dai, Liefeng Zhao
  • Patent number: 11635588
    Abstract: The application discloses an optical imaging lens assembly including, sequentially from an object side to an image side, a first lens having a positive refractive power with a convex object side surface and a concave image side surface; a second lens having a negative refractive power with a convex object side surface and a concave image side surface; a third lens having a refractive power; a fourth lens having a refractive power with a concave image side surface; a fifth lens having a refractive power; a sixth lens having a negative refractive power with a convex object side surface and a concave image side surface. An effective focal length f, an entrance pupil diameter EPD, half of a maximum field of view HFOV and a curvature radius R8 of the image side surface of the fourth lens satisfy f/EPD<2.0, 3.8 mm<f*TAN(HFOV)<5 mm, and R8?500 mm.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: April 25, 2023
    Inventors: Xinghai You, Kaiyuan Zhang, Lin Huang, Liefeng Zhao
  • Patent number: 11630283
    Abstract: An optical imaging lens is provided. The optical imaging lens includes sequentially from an object side to an image side along an optical axis: a first lens with a positive refractive power; a second lens with a negative refractive power; a third lens with a refractive power, an object side surface of the third lens being a convex surface, an image side surface of the third lens being a concave surface; a fourth lens with refractive power, an object side surface of the fourth lens being a convex surface, an image side surface of the fourth lens being a concave surface a fifth lens with a negative refractive power, an object side surface of the fifth lens being a convex surface, an image side surface of the fifth lens being a concave surface; and a sixth lens with a refractive power.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: April 18, 2023
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD.
    Inventors: Xiaofeng Weng, Mengna Tang, Jianke Wenren, Fujian Dai, Liefeng Zhao
  • Patent number: 11598934
    Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power with a convex object-side surface; a sixth lens having positive refractive power with a convex object-side surface a convex image-side surface; and a seventh lens having negative refractive power, wherein a distance TTL along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly and half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens assembly satisfy ImgH/(TTL/ImgH)>5.0 mm.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: March 7, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Chen Chen, Kaiyuan Zhang, Biao Xu, Fujian Dai, Liefeng Zhao
  • Patent number: 11598936
    Abstract: Some embodiments of the disclosure provide an optical imaging lens assembly. From an object side to an image side along an optical axis, the optical imaging lens assembly sequentially includes: a first lens having a refractive power; a second lens having a refractive power, and an object-side surface of the second lens is a convex surface, and an image-side surface of the second lens is a concave surface; a third lens having a refractive power; a fourth lens having a refractive power; a fifth lens having a refractive power; a sixth lens having a positive refractive power, an object-side surface of the sixth lens is a convex surface, and an image-side surface of the sixth lens is a convex surface; and a seventh lens having a negative refractive power, an object-side surface of the seventh lens is a concave surface, and an image-side surface is a concave surface.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: March 7, 2023
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD
    Inventors: Wenbo Huang, Lingbo He, Fujian Dai, Liefeng Zhao
  • Patent number: 11592647
    Abstract: The application discloses an optical imaging lens. The optical imaging lens sequentially includes from an object side to an image side along an optical axis: a first lens having a focal power; a diaphragm; a second lens having a focal power; a third lens having a focal power, and provided with an object-side surface and an image-side surface, the object-side surface is convex surface, the image-side surface is a concave surface; a fourth lens having a positive focal power, and provided with an object-side surface and an image-side surface, the object-side surface is a concave surface, the image-side surface is a convex surface; and a fifth lens having a negative focal power; at least one aspherical mirror surface is included in an object-side surface of the first lens to an image-side surface of the fifth lens; the optical imaging lens meets the following relational expressions: f/EPD<1.5, and 2 mm<ImgH*EPD/f<3 mm.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: February 28, 2023
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD
    Inventors: Qiqi Lou, Fujian Dai, Liefeng Zhao
  • Publication number: 20230057199
    Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens with a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface; a second lens with a negative refractive power; a third lens with a refractive power; a fourth lens with a refractive power; a fifth lens with a positive refractive power; a sixth lens with a refractive power; a seventh lens with a positive refractive power; and an eighth lens with a negative refractive power. ImgH is a half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, ImgH, an entrance pupil diameter (EPD) and a total effective focal length f of the optical imaging lens assembly satisfy: 4.3 mm<ImgH×EPD/f<5.3 mm.
    Type: Application
    Filed: May 25, 2022
    Publication date: February 23, 2023
    Inventors: Xiaoxiao ZHU, Chen CHEN, Wuchao XU, Fujian DAI, Liefeng ZHAO
  • Patent number: 11586019
    Abstract: The present disclosure discloses an optical imaging system. The optical imaging system satisfies: f/EPD?1.5; 0.3<T23*10/R4<1.8; ?0.6<f2/f4<?0.1; and TTL/ImgH<1.4, where f is an effective focal length of the optical imaging system, EPD is an entrance pupil diameter of the optical imaging system, T23 is a spaced interval between the second lens and the third lens along the optical axis, R4 a radius of curvature of an image-side surface of the second lens, f2 is an effective focal length of the second lens, f4 is an effective focal length of the fourth lens, TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging system, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: February 21, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd.
    Inventors: Saifeng Lyu, Mengna Tang, Fujian Dai, Liefeng Zhao
  • Patent number: 11579407
    Abstract: The present disclosure provides an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power; a second lens having refractive power; and a third lens having refractive power. A distance BFL along the optical axis from an image-side surface of the third lens of the optical imaging lens assembly to an imaging plane of the optical imaging lens assembly and a distance Td along the optical axis from an object-side surface of the first lens to the image-side surface of the third lens satisfy: 4.5?BFL/Td?7.0.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: February 14, 2023
    Inventors: Kaiyuan Zhang, Yi Zhang, Fujian Dai, Liefeng Zhao
  • Patent number: 11579405
    Abstract: The present disclosure discloses an optical imaging lens group including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having reactive power. The first lens has positive refractive power, a convex object-side surface, and a concave image-side surface. A total effective focal length f of the optical imaging lens group and half of a maximal field-of-view Semi-FOV of the optical imaging lens group satisfy: f*tan(Semi-FOV)>7.5 mm. A distance TTL along the optical axis from the object-side surface of the first lens to an imaging plane of the optical imaging lens group and half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens group satisfy: TTL/ImgH<1.3.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: February 14, 2023
    Inventors: Fenglong Lu, Fujian Dai, Liefeng Zhao
  • Patent number: 11579406
    Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power; a second lens having refractive power; a third lens having negative refractive power; a fourth lens having refractive power and a convex object-side surface; a fifth lens having refractive power and a concave object-side surface; a sixth lens having refractive power; a seventh lens having refractive power; and an eighth lens having refractive power. A total effective focal length f of the optical imaging lens assembly and half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfy: f*tan(Semi-FOV)>5.5 mm. A total effective focal length f of the optical imaging lens assembly and an effective focal length f1 of the first lens satisfy: 0.5<f/f1<1.5.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: February 14, 2023
    Inventors: Nian Chen, Kaiyuan Zhang, Fujian Dai, Liefeng Zhao
  • Patent number: 11573405
    Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power with a convex object-side surface and a concave image-side surface; a second lens having negative refractive power with a concave image-side surface; a third lens having refractive power with a convex object-side surface and a concave image-side surface; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having positive refractive power with a convex object-side surface; and an eighth lens having negative refractive power with a concave object-side surface and a concave image-side surface, wherein half of a diagonal length ImgH of an effective pixel area on an imaging plane of the optical imaging lens assembly satisfies: 5.80 mm<ImgH.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: February 7, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Yang Li, Lingbo He, Liefeng Zhao, Fujian Dai
  • Patent number: 11573398
    Abstract: The present disclosure discloses an optical imaging lens group including, sequentially from an object side to an image side along an optical axis, a first lens having positive refractive power with a convex object-side surface; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; and a sixth lens having negative refractive power with a concave object-side surface and a convex image-side surface. A total effective focal length f of the optical imaging lens group, an entrance pupil diameter EPD of the optical imaging lens group and half of a maximal field-of-view Semi-FOV of the optical imaging lens group satisfy: f/EPD<2, and f*tan(Semi-FOV)>4.5 mm.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: February 7, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd.
    Inventors: Biao Xu, Kaiyuan Zhang, Xiaofang Wang, Fujian Dai, Liefeng Zhao
  • Patent number: 11567295
    Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. At least one of the first lens to the seventh lens is a glass lens. The third lens has positive refractive power, and an image-side surface of the third lens is a convex surface. An object-side surface of the seventh lens is a convex surface, and an image-side surface of the seventh lens is a concave surface. A maximum field-of-view FOV of the optical imaging lens assembly satisfies FOV?134.56°. An effective half-aperture DT62 of an image-side surface of the sixth lens and an effective half-aperture DT72 of the image-side surface of the seventh lens satisfy 0.54?DT62/DT72.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: January 31, 2023
    Inventors: Chaoqun Jiang, Fujian Dai, Liefeng Zhao
  • Patent number: 11561377
    Abstract: The present disclosure discloses an optical imaging lens assembly, which includes: a first lens having positive refractive power and a convex object-side surface; a second lens having refractive power, and a concave image-side surface; a third lens having refractive power; a fourth lens having refractive power; and a fifth lens having negative refractive power, a concave object-side surface, and a concave image-side surface. The optical imaging lens assembly satisfies TL/ImgH<1.35; 0.6<R9/f5<1.2 and 0.5<ET5/ET4<1, where TTL is a total length of the optical imaging lens assembly, ImgH is a half diagonal length of an effective pixel area on an imaging plane, f5 is an effective focal length of the fifth lens, R9 is a radius of curvature of the object-side surface of the fifth lens, ET4 and ET5 are edge thicknesses of the fourth and the fifth lenses, respectively.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: January 24, 2023
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD
    Inventors: Nian Chen, Kaiyuan Zhang, Fujian Dai, Liefeng Zhao