Patents by Inventor Zhanfei ZHANG

Zhanfei ZHANG 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).

  • Optical imaging lens
    Patent number: 12153196
    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, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens has a positive refractive power; the fourth lens has a positive refractive power; the fifth lens has a negative refractive power; the seventh lens has a positive refractive power; the eighth lens has a negative refractive power; and a total effective focal length f of the optical imaging lens, an entrance pupil diameter EPD of the optical imaging lens and a distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 5 mm<f×(TTL/EPD)<7.2 mm.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: November 26, 2024
    Assignee: ZHEJIANG SUNNY OPTICS CO., LTD.
    Inventors: Zhanfei Zhang, Lin Huang
  • OPTICAL IMAGING SYSTEM
    Publication number: 20220187577
    Abstract: An optical imaging system includes, sequentially from an object side to an image side along an optical axis, a first lens (L1) having a positive refractive power and a convex object-side surface (S1); a second lens (L2) having a refractive power; a third lens (L3) having a refractive power; a fourth lens (L4) having a positive refractive power, a concave object-side surface (S7) and a convex image-side surface (S8); and a fifth lens (L5) having a negative refractive power.
    Type: Application
    Filed: March 3, 2022
    Publication date: June 16, 2022
    Applicant: Zhejiang Sunny Optics Co., Ltd
    Inventors: Zhanfei ZHANG, Lin Huang, Xin Zhou, Fujian Dai, Liefeng Zhao
  • Optical Imaging Lens
    Publication number: 20210255431
    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, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens has a positive refractive power; the fourth lens has a positive refractive power; the fifth lens has a negative refractive power; the seventh lens has a positive refractive power; the eighth lens has a negative refractive power; and a total effective focal length f of the optical imaging lens, an entrance pupil diameter EPD of the optical imaging lens and a distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy 5 mm<f×(TTL/EPD)<7.2 mm.
    Type: Application
    Filed: August 23, 2019
    Publication date: August 19, 2021
    Inventors: Zhanfei ZHANG, Lin HUANG