Patents by Inventor Guoan Zheng

Guoan Zheng 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: 8189204
    Abstract: Embodiments of the present invention relate to a surface wave enabled darkfield aperture structure comprising an aperture layer, a aperture in the aperture layer and a plurality of grooves around the aperture. The aperture layer has a first and second surface. The plurality of grooves is in the first surface. A surface wave propagates along at least the first surface. The plurality of grooves is configured to generate a darkfield at the aperture by modifying the surface wave to cancel out direct transmission of a uniform incident light field received by the aperture.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: May 29, 2012
    Assignee: California Institute of Technology
    Inventors: Xiquan Cui, Xin Heng, Changhuei Yang, Axel Scherer, Demetri Psaltis, Guoan Zheng
  • Publication number: 20120098950
    Abstract: A scanning projective lensless microscope device comprises a specimen surface, a scanning illumination source with a light element, a light detector outside the specimen surface, and a processor. The scanning illumination source scans the light element to a plurality of scanning locations to provide illumination to an object on the specimen surface. The light detector samples a sequence of sub-pixel shifted projection object images corresponding to the plurality of scanning locations. The processor constructs a high resolution image of the object based on the sequence of sub-pixel shifted projection images and a motion vector of the projections at a plane of interest.
    Type: Application
    Filed: October 25, 2011
    Publication date: April 26, 2012
    Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Guoan Zheng, Samuel Yang, Seung Ah Lee, Changhuei Yang
  • Publication number: 20110234757
    Abstract: A super resolution optofluidic microscope device comprises a body defining a fluid channel having a longitudinal axis and includes a surface layer proximal the fluid channel. The surface layer has a two-dimensional light detector array configured to receive light passing through the fluid channel and sample a sequence of subpixel shifted projection frames as an object moves through the fluid channel. The super resolution optofluidic microscope device further comprises a processor in electronic communication with the two-dimensional light detector array. The processor is configured to generate a high resolution image of the object using a super resolution algorithm, and based on the sequence of subpixel shifted projection frames and a motion vector of the object.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Guoan Zheng, Changhuei Yang, Samuel Yang, Seung Ah Lee
  • Publication number: 20110075254
    Abstract: Embodiments of the present invention relate to a surface wave enabled darkfield aperture structure comprising an aperture layer, a aperture in the aperture layer and a plurality of grooves around the aperture. The aperture layer has a first and second surface. The plurality of grooves is in the first surface. A surface wave propagates along at least the first surface. The plurality of grooves is configured to generate a darkfield at the aperture by modifying the surface wave to cancel out direct transmission of a uniform incident light field received by the aperture.
    Type: Application
    Filed: June 2, 2010
    Publication date: March 31, 2011
    Inventors: Xiquan Cui, Xin Heng, Changhuei Yang, Axel Scherer, Demetri Psaltis, Guoan Zheng