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).

  • Publication number: 20220317418
    Abstract: The disclosure provides an optical imaging 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 negative refractive power; a third lens having a refractive power; a fourth lens having a negative refractive power; a fifth lens having a negative refractive power; a sixth lens having a 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; wherein TTL, a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens assembly along the optical axis and f, a total effective focal length of the optical imaging lens assembly satisfy TTL/f<1.
    Type: Application
    Filed: March 10, 2022
    Publication date: October 6, 2022
    Inventors: Yifu CHENG, Mengna TANG, Jianke WENREN, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220317416
    Abstract: The disclosure provides an optical imaging lens assembly, sequentially including 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 positive refractive power; and a fourth lens with a negative refractive power, wherein an object-side surface thereof is a convex surface. A total effective focal length f of the optical imaging lens assembly meets: 20 mm<f<30 mm.
    Type: Application
    Filed: July 24, 2020
    Publication date: October 6, 2022
    Inventors: Yi ZHANG, Kaiyuan ZHANG, Fujian DAI, Liefeng ZHAO
  • Patent number: 11460672
    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, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each of which has refractive power. An object-side surface of the first lens is concave, and an image-side surface thereof is convex; the sixth lens has a positive refractive power; and the seventh lens has a negative refractive power, and an object-side surface thereof is convex. Half of a diagonal length ImgH of an effective pixel area on an imaging plane of the optical imaging system satisfies 6 mm<ImgH<7 mm; and a total effective focal length f of the optical imaging system and an effective focal length f6 of the sixth lens satisfy 0.22?f/f6<1.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: October 4, 2022
    Inventors: Xiaobin Zhang, Guihua Xie, Fujian Dai, Liefeng Zhao
  • Publication number: 20220308314
    Abstract: The present disclosure discloses an optical imaging system, along an optical axis from an object side to an image side, sequentially includes: a first lens having negative refractive power; a second lens having positive refractive power, and an object-side surface of the second lens being a convex surface; a third lens having refractive power; and a fourth lens having refractive power, and an object-side surface of the fourth lens being a concave surface. A total effective focal length f of the optical imaging system and half of a maximum field-of-view Semi-FOV of the optical imaging system satisfy: f×tan(Semi-FOV)?4.0 mm; and the total effective focal length f of the optical imaging system and an entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD<2.35.
    Type: Application
    Filed: January 7, 2022
    Publication date: September 29, 2022
    Inventors: Lili MIAO, Litong SONG, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220308318
    Abstract: The present disclosure provides an optical imaging system and a camera device equipped with the optical imaging system.
    Type: Application
    Filed: June 6, 2022
    Publication date: September 29, 2022
    Inventors: Saifeng LV, Fujian Dai
  • Publication number: 20220299734
    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 stop; a first lens having refractive power and a convex image-side surface; a second lens having refractive power; a third lens having positive refractive power and a concave image-side surface; a fourth lens having refractive power and a convex image-side surface; and a fifth lens having refractive power. An effective focal length f2 of the second lens and an effective focal length f3 of the third lens satisfy: 1.0<|f3/f2|<5.0. A center thickness CT4 of the fourth lens along the optical axis and an edge thickness ET4 of the fourth lens satisfy: 2.0<CT4/ET4<4.0. At least one of an object-side surface of the first lens to an image-side surface of the fifth lens is aspheric.
    Type: Application
    Filed: March 15, 2022
    Publication date: September 22, 2022
    Inventors: Lihui Ye, Fujian Dai, Liefeng Zhao
  • Patent number: 11448861
    Abstract: The disclosure discloses a zoom lens group, which sequentially includes from an object side to an image side along an optical axis: a first lens group having a negative refractive power; a second lens group having a positive refractive power; a third lens group having a refractive power and having a fifth lens and a sixth lens, wherein the fifth lens and the sixth lens are formed into a cemented lens; and a fourth lens group having a refractive power. By adjusting a spacing distance on the optical axis between the first lens group and the second lens group, a spacing distance on the optical axis between the second lens group and the third lens group and a spacing distance on the optical axis between the third lens group and the fourth lens group, the zoom lens group is switched from a long-focus state to a wide-angle state.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: September 20, 2022
    Assignee: ZHEJIANG SUNNY OPTICS CO., LTD.
    Inventors: Yi Zhang, Fujian Dai, Liefeng Zhao
  • Publication number: 20220291482
    Abstract: The present disclosure discloses an optical imaging lens assembly, comprising, sequentially along an optical axis from an object side to an image side: a first lens, having a positive refractive power; a second lens, having a negative refractive power; and a third lens, having a positive refractive power. A magnification M of the optical imaging lens assembly satisfies: 0.5<M<1.5.
    Type: Application
    Filed: March 9, 2022
    Publication date: September 15, 2022
    Inventors: Yang LI, Lingbo HE, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220291485
    Abstract: The disclosure provides an optical imaging system, sequentially including 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 refractive power; a third lens with a refractive power; a diaphragm; a fourth lens with a negative refractive power; a fifth lens with a positive refractive power, an image-side surface thereof is a concave surface; a sixth lens with a refractive power, an image-side surface thereof is a convex surface; and a seventh lens with a refractive power. At least one mirror surface from an object-side surface of the first lens to an image-side surface of the seventh lens is an aspheric mirror surface. A maximum field of view FOV of the optical imaging system and a distance SD from the diaphragm to the image-side surface of the seventh lens on the optical axis satisfy: 2.5 mm?1<Tan(FOV)/SD<3.5 mm?1.
    Type: Application
    Filed: February 17, 2022
    Publication date: September 15, 2022
    Inventors: Quanfeng YANG, Yinghui YUAN, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220283410
    Abstract: The present disclosure discloses an optical imaging system. The optical imaging system comprises, sequentially along an optical axis from an object side to an image side, a stop; 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 negative refractive power, an object-side surface of the fourth lens is a convex surface; a fifth lens, having a negative refractive power; a sixth lens, having a refractive power; and a seventh lens, having a refractive power. Here, one of the first to seventh lenses is an aspheric lens made of glass, and a radius of curvature R2 of an image-side surface of the first lens and a radius of curvature R1 of an object-side surface of the first lens satisfy: 2.5?(R2+R1)/R2?R1)<3.0.
    Type: Application
    Filed: March 3, 2022
    Publication date: September 8, 2022
    Applicant: Zhejiang Sunny Optical Co., Ltd.
    Inventors: Yang LI, Lingbo He, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220269045
    Abstract: The disclosure provides an optical imaging system, which sequentially includes, from an object side to an image side along an optical axis: a diaphragm; a first lens with a refractive power, an image-side surface thereof being a convex surface; a second lens with a refractive power; a third lens with a negative refractive power; a fourth lens with a refractive power, an image-side surface thereof being a convex surface; a fifth lens with a refractive power, an object-side surface thereof being a concave surface; a sixth lens with a refractive power; and a seventh lens with a refractive power. EPD is an entrance pupil diameter of the optical imaging system, and a total effective focal length f of the optical imaging system and EPD satisfy f/EPD?1.5.
    Type: Application
    Filed: February 11, 2022
    Publication date: August 25, 2022
    Inventors: Jiaying ZHANG, Saifeng LYU, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220269044
    Abstract: A camera lens group sequentially includes, from an object side to an image side along an optical axis: a first lens (E1) with a refractive power, wherein an object-side surface (S1) thereof is a concave surface, while an image-side surface (S2) is a convex surface; a second lens (E2) with a refractive power, wherein an object-side surface (S3) is a convex surface, while an image-side surface (S4) is a concave surface; a third lens (E3) with a positive refractive power; a fourth lens (E4) with a refractive power; a fifth lens (E5) with a positive refractive power, wherein an object-side surface (S9) thereof is a concave surface, while an image-side surface (S10) is a convex surface; and a sixth lens (E6) with a negative refractive power, wherein an object-side surface (S11) thereof is a convex surface, while an image-side surface (S12) is a concave surface. A half lmgH of a diagonal length of an effective pixel region on an imaging surface (S15) of the camera lens group meets lmgH>4.60 mm.
    Type: Application
    Filed: August 12, 2020
    Publication date: August 25, 2022
    Inventors: Long LI, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220269050
    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; a second lens with a negative refractive power; a third lens, an image-side surface thereof is a convex surface; a fourth lens with a negative refractive power, an object-side surface thereof is a concave surface, and an image-side surface thereof is a concave surface; a fifth lens; and a sixth lens; wherein TTL is an on-axis distance from an object-side surface of the first lens to an imaging surface, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, and TTL and ImgH satisfy: TTL/ImgH?1.35; an effective focal length f3 of the third lens and an effective focal length f of an optical imaging lens assembly satisfy: 2.5?f3/f?4.0.
    Type: Application
    Filed: January 17, 2022
    Publication date: August 25, 2022
    Inventors: Yudi FENG, Yi ZHANG, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220260810
    Abstract: Embodiments of the present disclosure disclose a camera lens group, comprising, sequentially along an optical axis from an object side to an image side: a stop; a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power. A distance TTL on the optical axis from the object-side surface of the first lens to an image plane of the camera lens group and half of a diagonal length ImgH of an effective pixel area on the image plane of the camera lens group satisfy: TTL/ImgH?1.25. At least one of the surfaces from the object-side surface of the first lens to the image-side surface of the sixth lens is an aspheric surface.
    Type: Application
    Filed: January 20, 2022
    Publication date: August 18, 2022
    Inventors: Yang Li, Lingbo He, Fujian Dai, Liefeng Zhao
  • Publication number: 20220252843
    Abstract: An optical imaging lens assembly is provided, which includes, sequentially from an object side to an image side along an optical axis, a first lens having a refractive power with a convex object-side surface; a second lens having a refractive power with a convex object-side surface; a third lens having a positive refractive power; a fourth lens having a negative refractive power with a concave object-side surface; a fifth lens having a refractive power; and a sixth lens having a refractive power. A half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfies: Semi-FOV?70°. A half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging lens assembly satisfies: ImgH?7.8 mm.
    Type: Application
    Filed: December 30, 2021
    Publication date: August 11, 2022
    Applicant: Zhejiang Sunny Optics Co.,Ltd.
    Inventors: Xiangyue MENG, Liqi YU, Lili MIAO, Liefeng ZHAO, Fujian DAI
  • Publication number: 20220252831
    Abstract: An optical imaging lens assembly is provided, which includes, a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; and a seventh lens with a convex object-side surface. An axial distance TTL from an object-side surface of the first lens to an imaging plane of the optical imaging lens assembly and a half of a maximal field-of-view Semi-FOV of the optical imaging lens assembly satisfy: TTL/Tan(Semi-FOV)<1.0 mm; and a total effective focal length f of the optical imaging lens assembly, 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: ?5.0<f/(R11?R12)<?2.0.
    Type: Application
    Filed: December 30, 2021
    Publication date: August 11, 2022
    Applicant: Zhejiang Sunny Optics Co., Ltd.
    Inventors: Jianke WENREN, Liefeng Zhao, Fujian Dai
  • Publication number: 20220244494
    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 negative refractive power, a second lens with a refractive power, a third lens with a refractive power, a fourth lens with a positive refractive power, a fifth lens with a refractive power, a sixth lens with a refractive power, a seventh lens with a positive refractive power, an eighth lens with a negative refractive power, and a ninth 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 and a total effective focal length f of the optical imaging lens assembly meet 1.2<ImgH/f<2.2. There is a spacing distance between any two adjacent lenses in the first lens to the ninth lens.
    Type: Application
    Filed: January 24, 2022
    Publication date: August 4, 2022
    Inventors: Yeping SUN, Yang LI, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220244503
    Abstract: The present disclosure discloses an optical imaging lens group. The optical imaging lens group comprises, sequentially along an optical axis from an object side to an image side, 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, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens have refractive powers. At least one lens in the first lens to the eighth lens has a non-rotationally symmetric aspheric surface; a total effective focal length fy of the optical imaging lens group in a Y-axis direction and a total effective focal length fx of the optical imaging lens group in an X-axis direction satisfy: fy/fx<0.8; and an f-number Fnoy of the optical imaging lens group in the Y-axis direction satisfies: Fnoy<2.9.
    Type: Application
    Filed: December 29, 2021
    Publication date: August 4, 2022
    Applicant: ZHEJIANG SUNNY OPTICS CO., LTD.
    Inventors: Xiaofang WANG, Xiaobin ZHANG, Jianke WENREN, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220244491
    Abstract: The disclosure provides an optical imaging lens assembly and a fingerprint identification device with the optical imaging lens assembly. The optical imaging lens assembly sequentially comprises, from an object side to an image side along an optical axis: a first lens with a negative refractive power, an object-side surface thereof being a concave surface; a second lens with a positive refractive power, an object-side surface thereof being a convex surface; and a third lens with a positive refractive power, an object-side surface thereof being a convex surface while an image-side surface being a convex surface. EPD is an entrance pupil diameter of the optical imaging lens assembly, and a total effective focal length f of the optical imaging lens assembly and EPD meet f/EPD<1.65. FOV is a maximum field of view of the optical imaging lens assembly, and FOV meets 125°<FOV<140°.
    Type: Application
    Filed: January 19, 2022
    Publication date: August 4, 2022
    Inventors: Li XIE, Fujian DAI, Liefeng ZHAO
  • Publication number: 20220244493
    Abstract: The present disclosure discloses an optical imaging system, comprising, sequentially along an optical axis from an object side to an image side, a prism, a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, where each of the first lens to the seventh lens has a refractive powers. The prism reflects light incident to the prism along a first direction, to cause the light to emerge from the prism along a second direction. The diaphragm to the seventh lens are sequentially disposed from the prism to the image side along the second direction. The second lens has a positive refractive power, and an image-side surface of the second lens is a concave surface. The third lens has a negative refractive power. The fourth lens has a negative refractive power, and an image-side surface of the fourth lens is a concave surface. The fifth lens has a positive refractive power.
    Type: Application
    Filed: January 5, 2022
    Publication date: August 4, 2022
    Inventors: Yang LI, Lingbo HE, Lin HUANG, Fujian DAI, Liefeng ZHAO