Patents by Inventor Alexandra H. Chau

Alexandra H. Chau 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: 12335613
    Abstract: Imaging apparatus includes a camera, which includes an autofocus mechanism. A range sensor includes a transmitter, which includes multiple emitters configured to transmit optical pulses at different angles toward the scene, and a receiver, to receive and sense respective times of flight of the optical pulses that are reflected from the scene. A photodetector outputs a signal indicative of an intensity of reflections from the scene. Control circuitry drives the emitters in alternation to transmit the optical pulses, estimates a range to a target in the scene responsively to the times of flight sensed by the receiver, detects a difference in the signal output by the photodetector in response to the pulses transmitted by different ones of the emitters, and sets the autofocus mechanism responsively to the estimated range as long as the detected difference is no greater than a predefined threshold difference.
    Type: Grant
    Filed: May 30, 2023
    Date of Patent: June 17, 2025
    Assignee: Apple Inc.
    Inventors: Moshe Laifenfeld, Jason R. Holloway, Alexandra H. Chau, Gregory Guyomarc'h, Connor Henley, Oriel Y. Bergig
  • Publication number: 20240406552
    Abstract: Imaging apparatus includes a camera, which includes an autofocus mechanism. A range sensor includes a transmitter, which includes multiple emitters configured to transmit optical pulses at different angles toward the scene, and a receiver, to receive and sense respective times of flight of the optical pulses that are reflected from the scene. A photodetector outputs a signal indicative of an intensity of reflections from the scene. Control circuitry drives the emitters in alternation to transmit the optical pulses, estimates a range to a target in the scene responsively to the times of flight sensed by the receiver, detects a difference in the signal output by the photodetector in response to the pulses transmitted by different ones of the emitters, and sets the autofocus mechanism responsively to the estimated range as long as the detected difference is no greater than a predefined threshold difference.
    Type: Application
    Filed: May 30, 2023
    Publication date: December 5, 2024
    Inventors: Moshe Laifenfeld, Jason R. Holloway, Alexandra H. Chau, Gregory Guyomarc'h, Connor Henley, Oriel Y. Bergig
  • Publication number: 20090073439
    Abstract: Exemplary apparatus and method can be provided for controlling at least one electro-magnetic radiation. For example, it is possible to rotate and/or translate at least one optical waveguide. At least one of the optical waveguide(s) can receive a first radiation at a first wavelength and transmit the first radiation to at least one sample. Such optical waveguide and/or another optical waveguide may receive a second radiation at a second wavelength that is different from the first wavelength. For example, the second radiation may be produced based on an inelastic scattering of the first radiation. In addition, exemplary apparatus and method can be provided which can also be used to receive data associated with the second radiation, determine at least one characteristic of the at least one sample based on the data, and generate the image and/or the map of a portion of the arterial sample based on the at least one characteristic.
    Type: Application
    Filed: September 15, 2008
    Publication date: March 19, 2009
    Applicant: The General Hospital Corporation
    Inventors: Guillermo J. Tearney, Brett E. Bouma, Jason T. Motz, Joseph A. Gardecki, Alexandra H. Chau