Patents by Inventor Changtao HU

Changtao HU 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).

  • Lens system and imaging device
    Patent number: 11204488
    Abstract: The present disclosure relates to a lens system and an imaging device including the lens system. The lens system may include a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group in sequence from an object side to an image side along an optical axis of the lens system. At least one of the first lens group, the second lens group, the third lens group, the fourth lens group, and the fifth lens group may be adjustable along the optical axis of the lens system to adjust a focal length of the lens system. The lens system may satisfy a ? f 2 ( f w · f t ) 1 / 2 ? b , c ? f 3 ( f w · f t ) 1 / 2 ? d , e ? f 4 ( f w · f t ) 1 / 2 ? f .
    Type: Grant
    Filed: March 4, 2020
    Date of Patent: December 21, 2021
    Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Changtao Hu, Kai Liu, Faguan Lin, Hongxing Ding
  • LENS SYSTEM AND IMAGING DEVICE
    Publication number: 20200201006
    Abstract: The present disclosure relates to a lens system and an imaging device including the lens system. The lens system may include a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group in sequence from an object side to an image side along an optical axis of the lens system. At least one of the first lens group, the second lens group, the third lens group, the fourth lens group, and the fifth lens group may be adjustable along the optical axis of the lens system to adjust a focal length of the lens system. The lens system may satisfy a ? f 2 ( f w · f t ) 1 / 2 ? b , c ? f 3 ( f w · f t ) 1 / 2 ? d , e ? f 4 ( f w · f t ) 1 / 2 ? f .
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Applicant: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
    Inventors: Changtao HU, Kai LIU, Faguan LIN, Hongxing DING