Patents by Inventor Jade Zhang

Jade Zhang 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).

  • Patent number: 8464951
    Abstract: A method, system, and apparatus for monitoring an exit window of a scanner using a plurality of imaging devices. The method includes capturing a first image through the exit window using a first imaging device, capturing a second image through the exit window using a second different imaging device, and detecting at least one of a plurality of features in both the first and second images. The method further includes matching the plurality of features detected in both the first and the second images, determining whether the at least one matched feature is present on the plane of the exit window, and monitoring a physical condition of the exit window based on the at least one feature.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: June 18, 2013
    Assignee: Symbol Technologies, Inc.
    Inventors: Miroslav Trajkovic, Jade Zhang
  • Publication number: 20110101099
    Abstract: A method, system, and apparatus for monitoring an exit window of a scanner using a plurality of imaging devices. The method includes capturing a first image through the exit window using a first imaging device, capturing a second image through the exit window using a second different imaging device, and detecting at least one of a plurality of features in both the first and second images. The method further includes matching the plurality of features detected in both the first and the second images, determining whether the at least one matched feature is present on the plane of the exit window, and monitoring a physical condition of the exit window based on the at least one feature.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 5, 2011
    Inventors: Miroslav Trajkovic, Jade Zhang
  • Patent number: 7743989
    Abstract: Laser power control arrangements interrupt power to a laser used in electro-optical readers upon detection of operating conditions not conforming to preestablished standards, and adjust power to the laser to enhance reader performance without violating prevalent safety standards. Dual monitors are used to independently monitor the output power of the laser.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: June 29, 2010
    Assignee: Symbol Technologies, Inc.
    Inventors: Vladimir Gurevich, Heng (Jade) Zhang, David Tsi Shi
  • Publication number: 20080078835
    Abstract: Laser power control arrangements interrupt power to a laser used in electro-optical readers upon detection of operating conditions not conforming to preestablished standards, and adjust power to the laser to enhance reader performance without violating prevalent safety standards. Dual monitors are used to independently monitor the output power of the laser.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 3, 2008
    Inventors: Vladimir Gurevich, Heng Jade Zhang, David Tsi Shi
  • Patent number: 7224538
    Abstract: The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: May 29, 2007
    Assignee: Symbol Technologies, Inc.
    Inventors: Igor Vinogradov, Vladimir Gurevich, David Tsi Shi, Dariusz J. Madej, Mehul M. Patel, Edward Barkan, Heng (Jade) Zhang
  • Patent number: 7063261
    Abstract: The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: June 20, 2006
    Assignee: Symbol Technologies, Inc.
    Inventors: Igor Vinogradov, Vladimir Gurevich, David Tsi Shi, Dariusz J. Madej, Mehul M. Patel, Edward Barkan, Heng (Jade) Zhang