Patents by Inventor Guo-Fei Gao

Guo-Fei Gao 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: 7586694
    Abstract: A lens assembly includes, in order from an object side toward an image side along an optical axis thereof, a first lens having positive refractive power, and a second lens. The lens assembly satisfies the following conditions: 0<|f1/f|<2 and 0<|f2/f|<7, wherein f is an effective focal length of the lens assembly, f1 is an effective focal length of the first lens, and f2 is an effective focal length of the second lens. The first lens has at least one spherical surface, thus effectively decreasing the production cost of the lens assembly.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: September 8, 2009
    Assignee: Genius Electronic Optical Co., Ltd.
    Inventors: Shih-Han Chen, Guo-Fei Gao, Lie-Hong Li
  • Publication number: 20090195893
    Abstract: A lens assembly includes, in order from an object side toward an image side along an optical axis thereof, a first lens having positive refractive power, and a second lens. The lens assembly satisfies the following conditions: 0<|f1/f|<2 and 0<|f2/f|<7, wherein f is an effective focal length of the lens assembly, f1 is an effective focal length of the first lens, and f2 is an effective focal length of the second lens. The first lens has at least one spherical surface, thus effectively decreasing the production cost of the lens assembly.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 6, 2009
    Applicant: Genius Electronic Optical Co., Ltd.
    Inventors: Shih-Han Chen, Guo-Fei Gao, Lie-Hong Li