Patents by Inventor Fujian Dai

Fujian Dai 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: 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: 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: 11573401
    Abstract: The application discloses an optical imaging system. The system sequentially comprises the following components from an object side to an image side along an optical axis: a first lens having refractive power, an image side surface of which is a convex surface; a second lens having negative refractive power; a third lens having refractive power, the image side surface of which is a concave surface; a fourth lens having refractive power; a fifth lens having refractive power, the object side surface of which is a convex surface; a sixth lens with positive refractive power, the object side surface of which is a convex surface; a seventh lens having refractive power; an effective focal length f of the optical imaging system and an entrance pupil diameter EPD of the optical imaging system meet the condition that f/EPD is less than 2; the effective focal length f of the optical imaging system, an effective focal length f1 of the first lens, and an effective focal length f2 of the second lens satisfy 0.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: February 7, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Fujian Dai, Lin Huang, Yunbing Ji
  • 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
  • Patent number: 11550127
    Abstract: The present disclosure discloses an optical imaging lens assembly including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, each of which has refractive power. The first lens has a negative refractive power; the the third lens and the sixth lens each has a positive refractive power; an object-side surface of the fourth lens is convex, and an image-side surface thereof is concave; an object-side surface of the fifth lens is convex,and an image-side surface thereof is concave. 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 TTL/ImgH?1.25.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: January 10, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Xin Wang, Yabin Hu, Fujian Dai, Liefeng Zhao
  • Patent number: 11550131
    Abstract: The present disclosure discloses an imaging apparatus and an electronic device. The imaging apparatus includes a macro lens group, a wide-angle lens group, and a telephoto lens group. An effective focal length fA of the macro lens group, an effective focal length fB of the wide-angle lens group and an effective focal length fC of the telephoto lens group satisfy: fA<fB<fC, 0.20<fA/fB<0.80 and 0.10<fA/fC<0.50.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: January 10, 2023
    Inventors: Liefeng Zhao, Jia Lu, Mengna Tang, Jianke Wenren, Fujian Dai
  • Patent number: 11543629
    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 stop; a second lens having a refractive power; a third lens having a negative refractive power; a fourth lens having a refractive power with a convex object-side surface, and a convex image-side surface; and a fifth lens having a refractive power. Half of a maximal field-of-view Semi-FOV of the optical imaging system satisfies 45.0°?Semi-FOV<65.0°, and an effective focal length f2 of the second lens and a center thickness CT2 of the second lens along the optical axis satisfy 2.5?f2/CT2?3.0.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: January 3, 2023
    Inventors: Yang Li, Wuchao Xu, Kaiyuan Zhang, Liefeng Zhao, Fujian Dai
  • Patent number: 11543627
    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 a positive refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power, a fifth lens having a refractive power, of which an image-side surface is a concave surface; a sixth lens having a refractive power; and a seventh lens having a negative refractive power. An effective focal length f of the optical imaging lens assembly and half of a maximal field-of-view angle HFOV of the optical imaging lens assembly satisfy: 5.5 mm<tan(HFOV)*f<6.5 mm. The optical imaging lens assembly of the present disclosure has at least one of the advantages of a large imaging plane, a large wide angle, a large aperture and ultra-thinness.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: January 3, 2023
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Lin Huang, Fujian Dai, Liefeng Zhao
  • Publication number: 20220413261
    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 group having a positive refractive power and including a first lens; and a second lens group having a positive refractive power and sequentially including from the first lens to the image side along the optical axis: a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the second lens has 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 concave surface; the seventh lens has a positive refractive power; the eighth lens has a negative refractive power.
    Type: Application
    Filed: May 27, 2022
    Publication date: December 29, 2022
    Inventors: Dan HE, Zheng FANG, Saifeng LV, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220404588
    Abstract: The disclosure provides an optical imaging lens assembly, sequentially including, from an object side to an image side along an optical axis: an iris diaphragm; 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 refractive power; a third lens with a refractive power; a fourth lens with a refractive power; a fifth lens with a refractive power: a sixth lens with refractive power; a seventh lens with a positive refractive power; and an eighth lens with a negative refractive power. EPDmax is a maximum entrance pupil diameter of the optical imaging lens assembly, EPDmin is a minimum entrance pupil diameter of the optical imaging lens assembly, and EPDmax, EPDmin and a total effective focal length f of the optical imaging lens assembly satisfy: f/(EPDmax?EPDmin)>2.2.
    Type: Application
    Filed: May 20, 2022
    Publication date: December 22, 2022
    Inventors: Haidong XIAO, Fujian DAI, Liefeng ZHAO
  • Patent number: 11531189
    Abstract: The present disclosure discloses an optical imaging system including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, each of which has refractive power. An object-side surface of the second lens is a convex surface, and an image-side surface thereof is a concave surface; an object-side surface of the fourth lens is a convex surface, and an image-side surface thereof is a concave surface; an object-side surface of the fifth lens is a concave surface, and an image-side surface thereof is a convex surface; and each of the third lens and the sixth lens has positive refractive power. A radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens satisfy 0.5<R11/R12<1.5.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: December 20, 2022
    Inventors: Lihui Ye, Fujian Dai, Liefeng Zhao
  • Patent number: 11531186
    Abstract: The present disclosure discloses an electronic imaging device including a first capturing device and a second capturing device. The first capturing device includes a first lens system and a first electronic photosensitive element located on an imaging plane of the first lens system. The second capturing device includes a second lens system and a second electronic photosensitive element located on an imaging plane of the second lens system. The first capturing device and the second capturing device are located at a same side of the electronic imaging device, and a field-of-view of the first capturing device is different from a field-of-view of the second capturing device. A total effective focal length fT of the first lens system and a total effective focal length fW of the second lens system satisfy fT/fW>3.3.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: December 20, 2022
    Assignee: Zhejiang Sunny Optical Co., Ltd.
    Inventors: Jianke Wenren, Jia Lu, Lin Huang, Fujian Dai, Liefeng Zhao
  • Patent number: 11531187
    Abstract: The present disclosure provides an optical imaging lens assembly, the optical imaging lens assembly sequentially includes, along an optical axis from an object side to an image side: a first lens having a refractive power, where an object-side surface thereof is a concave surface and an image-side surface thereof is a convex surface; a second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a refractive power, where an object-side surface thereof is a convex surface and an image-side surface thereof is a concave surface; and a seventh lens having a negative refractive power.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: December 20, 2022
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD.
    Inventors: Xiaoting Geng, Xinquan Wang, Fujian Dai, Liefeng Zhao
  • Patent number: 11531190
    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 a positive refractive power; a second lens having a positive refractive power; a third lens having a negative refractive power; a fourth lens having a refractive power, an object-side surface thereof being a concave surface, and an image-side surface thereof being a convex surface; a fifth lens having a refractive power; a sixth lens having a positive refractive power, an object-side surface thereof being a concave surface, and an image-side surface thereof being a convex surface; and a seventh lens having a refractive power. An effective focal length f of the optical imaging lens assembly and an entrance pupil diameter of the optical imaging lens assembly satisfy f/EPD<1.5.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: December 20, 2022
    Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD.
    Inventors: Lihui Ye, Fujian Dai, Liefeng Zhao
  • Publication number: 20220397742
    Abstract: The disclosure provides an optical imaging camera lens assembly, sequentially including, from an object side to an image side along an optical axis: a first lens having a positive refractive power; a second lens, an object-side surface thereof being a convex surface, and an image-side surface thereof being a concave surface; a third lens having a negative refractive power, and an object-side surface thereof being a convex surface; a fourth lens; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power, wherein ImgH is a half of a diagonal length of an effective pixel region on an imaging surface, and TTL is an on-axis distance from the object-side surface of the first lens to the imaging surface, ImgH and TTL satisfy: 4.8 mm<ImgH*ImgH/TTL<7.0 mm; an Abbe number V1 of the first lens satisfies: 70<V1<90.
    Type: Application
    Filed: May 31, 2022
    Publication date: December 15, 2022
    Inventors: Shuang ZHANG, Xiaobin ZHANG, Jianke WENREN, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220390712
    Abstract: The disclosure provides an optical imaging camera lens assembly, sequentially including, from an object side to an image side along an optical axis: a first lens having a refractive power; a second lens having a positive refractive power; a third lens having a refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a refractive power; and a seventh lens having a refractive power. At least four lenses among the first lens to the fifth lens are lenses made of a plastic material; the sixth lens is a spherical lens made of a glass material; and a total effective focal length f of the optical imaging camera lens assembly and an entrance pupil diameter (EPD) of the optical imaging camera lens assembly satisfy: f/EPD<1.2.
    Type: Application
    Filed: June 1, 2022
    Publication date: December 8, 2022
    Inventors: Fujian DAI, Xiaoting GENG, Liefeng ZHAO
  • Publication number: 20220373771
    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 refractive power, a second lens with a refractive power, a third lens with a negative refractive power, and a fourth lens with a positive refractive power. A total effective focal length f of the optical imaging lens assembly satisfies 20 mm<f<30 mm.
    Type: Application
    Filed: July 24, 2020
    Publication date: November 24, 2022
    Inventors: Yi ZHANG, Kaiyuan ZHANG, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220365317
    Abstract: The disclosure provides an optical imaging lens assembly, wherein the optical imaging lens assembly sequentially includes the followings from an object side to an image side along an optical axis: a first lens having a positive focal power, wherein an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface; a second lens having a focal power; a third lens having a focal power; a fourth lens having a focal power; a fifth lens having a focal power; a sixth lens having a positive focal power; and a seventh lens having a negative focal power, wherein an object-side surface thereof is a concave surface, and an image-side surface thereof is a concave surface. DT11, DT12 and ImgH meet:2.4<(DT11+DT12)/lmgHx5<2.7.
    Type: Application
    Filed: September 3, 2020
    Publication date: November 17, 2022
    Inventors: Chen CHEN, Kaiyuan ZHANG, Biao XU, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220365316
    Abstract: An optical imaging lens sequentially includes, from an object side to an image side along an optical axis: a first lens (E1) with refractive power; a second lens (E2) with positive refractive power; a third lens (E3) with positive refractive power; a fourth lens (E4) with refractive power; a fifth lens (E5) with positive refractive power; a sixth lens (E6) with refractive power; and a seventh lens (E7) with refractive power. A total effective focal length f of the optical imaging lens and a curvature radius R4 of an image-side surface of the second lens meet 0.6<R4/f<1.5. TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis, and ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, TTL and ImgH meet 0.55<TTL/(ImgH×2)<0.75.
    Type: Application
    Filed: July 11, 2019
    Publication date: November 17, 2022
    Inventors: Yuanlin JIA, Wuchao XU, Fujian DAI, Liefeng ZHAO