Patents by Inventor Ching-Fa Chiang

Ching-Fa Chiang 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).

  • Insertion type lens assembly for an optical system
    Patent number: 6819508
    Abstract: An insertion type lens assembly for an optical system which connects a plastic lens and a plastic lens, a plastic lens and a glass lens, or a plastic lens and a barrel. A separation mold surface is located different sides, and a spacer is located between the lenses. The concentric contact plane is located at the inner periphery of the lens core or the sleeve. The vertical contact plane is located at the inner periphery of the lens core or the machining surface of the sleeve. Such that the present invention can avoid hairs on the separation mold surface and increases the precision of the shape of the surface of insert.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: November 16, 2004
    Assignee: Largan Precision Co., Ltd.
    Inventor: Ching-Fa Chiang
  • Lens assembly for an optical system
    Publication number: 20040125470
    Abstract: An insertion type lens assembly for an optical system which connects a plastic lens and a plastic lens, a plastic lens and a glass lens, or a plastic lens and a barrel. A separation mold surface is located different sides, and a spacer is located between the lenses. The concentric contact plane is located at the inner periphery of the lens core or the sleeve. The vertical contact plane is located at the inner periphery of the lens core or the machining surface of the sleeve. Such that the present invention can avoid hairs on the separation mold surface and increases the precision of the shape of the surface of insert.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 1, 2004
    Inventor: Ching-Fa Chiang