Patents by Inventor Zhixia Chao

Zhixia Chao 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 imaging latent fingerprints
    Patent number: 7154661
    Abstract: The present invention relates to a method and apparatus for clearly imaging samples such as fingerprints on substrates of forensic samples. The present invention overcomes the problems of the Laser-Induced-Fluorescence (LIF) technique to distinguish fluorescence from the sample from that of the substrate. The method of the present invention uses either a homodyne- or a heterodyne-assisted phase resolving method, or both, to suppress the contribution of the substrate fluorescence. The resulting image of the sample will then be sufficiently clear for forensic purposes. The present invention may also be used on histological and biochemical samples to visualise latent images.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: December 26, 2006
    Assignee: Nanyang Technological University
    Inventors: Leong Keey Seah, Murukeshan Vadake Matham, Lin Seng Ong, Zhixia Chao, Dinish Unnimadhava Kurup Soudamini Amma, Sock Koon Ong
  • Method and apparatus for imaging latent fingerprints
    Publication number: 20060114549
    Abstract: The present invention relates to a method and apparatus for clearly imaging samples such as fingerprints on substrates of forensic samples. The present invention overcomes the problems of the Laser-Induced-Fluorescence (LIF) technique to distinguish fluorescence from the sample from that of the substrate. The method of the present invention uses either a homodyne- or a heterodyne-assisted phase resolving method, or both, to suppress the contribution of the substrate fluorescence. The resulting image of the sample will then be sufficiently clear for forensic purposes. The present invention may also be used on histological and biochemical samples to visualise latent images.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 1, 2006
    Inventors: Leong Seah, Murukeshan Matham, Lin Ong, Zhixia Chao, Dinish Unnimadhava Kurup Soudamini Amma, Sock Ong