Patents by Inventor Der-Kuam Kang

Der-Kuam Kang 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).

  • Method and apparatus for a fringe direct writing system
    Patent number: 6268893
    Abstract: A structure and method of operation of a fringe direct writing system to produce a hologram or the like. The apparatus is roughly classified into four parts: an illumination part; an image display and optical imaging part; an optically autofocusing part; and a two dimensional moveable stage part. The method of operation directly images a pattern, which is previously calculated by computer and displayed on the LCD panel, onto a recording material. This method affords the possibility to write a fringe pattern in a large region within a short period of time.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: July 31, 2001
    Assignee: American Bank Note Holographics
    Inventors: Lily O'Boyle, Der-Kuam Kang