Patents by Inventor Choi W. Bum

Choi W. Bum 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).

  • Apparatus for determining reflectivity of an object such as a mirror
    Patent number: 4691106
    Abstract: An apparatus for detecting defects in a laser mirror by using a laser beam in order to detect any possible changes in reflectivity over the surface of the mirror. A laser beam is split by a beam splitter into one portion for scanning the mirror to be inspected and which is reflected therefrom to produce a reflection signal, the remaining portion of the beam providing a reference signal. A computer receives both signals and on the basis of comparison thereof determines the condition of the mirror because there will be incorrect reflection of the laser beam from any region of the mirror which is defective.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: September 1, 1987
    Assignee: Daewoo Heavy Industries Ltd.
    Inventors: Choi J. Hyun, Lee J. Chul, Choi W. Bum