Patents by Inventor Ba Cao

Ba Cao 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 detecting wavelength and measuring optical power
    Patent number: 7619727
    Abstract: The present invention relates to a light wavelength and intensity measuring device. The device automatically measures a center wavelength of the light source and an intensity of the light corresponding to the center wavelength by using a main photodetector, at least one optical filter, and at least one sub photodetector when the light source is connected to the device. The main photodetector detects the intensity of the light applied by the light source, the optical filter transmits the light corresponding to a prediscriminated transmission wavelength, and the sub photodetector detects the intensity of the light transmitted through the optical filter. Therefore, the light intensity is more accurately measured by calibrating the intensity according to the wavelength.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: November 17, 2009
    Assignee: Raybit Systems Inc.
    Inventors: Gap Youl Lyu, Kilhun Koo, Min Hee Kang, Ba Cao
  • Apparatus for detecting wavelength and measuring optical power
    Publication number: 20090033923
    Abstract: The present invention relates to a light wavelength and intensity measuring device. The device automatically measures a center wavelength of the light source and an intensity of the light corresponding to the center wavelength by using a main photodetector, at least one optical filter, and at least one sub photodetector when the light source is connected to the device. The main photodetector detects the intensity of the light applied by the light source, the optical filter transmits the light corresponding to a prediscriminated transmission wavelength, and the sub photodetector detects the intensity of the light transmitted through the optical filter. Therefore, the light intensity is more accurately measured by calibrating the intensity according to the wavelength.
    Type: Application
    Filed: June 7, 2006
    Publication date: February 5, 2009
    Inventors: Gap Youl Lyu, Kilhun Koo, Min Hee Kang, Ba Cao