Patents by Inventor Ssang-Gun Lim

Ssang-Gun Lim 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).

  • Publication number: 20030043387
    Abstract: An apparatus and method for measuring a three-dimensional shape of an object using a projection moiré device. The method comprises the steps of obtaining a grid pattern image projected on a reference plane of a moving table and applying a buckets algorithm thereto, thereby achieving a reference phase, obtaining a grid pattern image projected on the object set on the moving table and applying a buckets algorithm thereto, thereby achieving an object phase, calculating a difference phase between the object phase and the reference phase, thereby achieving a moiré phase, and unwrapping the moiré phase, thereby achieving a level information of the object. The apparatus and method measure the three-dimensional shape using a projection grid without a reference grid, thereby achieving compactness of equipment, simplicity in usage and manufacturing cost reduction.
    Type: Application
    Filed: July 18, 2002
    Publication date: March 6, 2003
    Inventors: Ssang-Gun Lim, Seung-Woo Kim, Sang-Yoon Lee, Chang-Jin Chung, Yi-Bae Choi, Young-Sik Cho, Kyung-Keun Park