Patents by Inventor Zheng-Yong LU

Zheng-Yong LU 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).

  • Stress measurement method and system for optical materials
    Patent number: 10067012
    Abstract: A stress measurement method is provided of the present disclosure. The stress measurement method includes an image capturing procedure, a phase shift calculation procedure, an isochromatic intensifying procedure and a transformation procedure. The image capturing procedure is used to capture four light intensity images with four different phase angles of a sample. The phase shift calculation procedure is used to obtain an isochromatic retardation of the sample when the four light intensity images have sufficient light intensity values. The isochromatic intensifying procedure is used to calculate two enhanced light intensity values, the background of intensified isochromatic light intensity value and the amplitude of intensified isochromatic light intensity value to obtain an isochromatic retardation when the sample is in a low stress condition. The transformation procedure is used to transform the isochromatic retardation to a stress value of the sample.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: September 4, 2018
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Wei-Chung Wang, Po-Chi Sung, Zheng-Yong Lu, Yu-Liang Yeh, Po-Yu Chen
  • STRESS MEASUREMENT METHOD AND SYSTEM FOR OPTICAL MATERIALS
    Publication number: 20180164169
    Abstract: A stress measurement method is provided of the present disclosure. The stress measurement method includes an image capturing procedure, a phase shift calculation procedure, an isochromatic intensifying procedure and a transformation procedure. The image capturing procedure is used to capture four light intensity images with four different phase angles of a sample. The phase shift calculation procedure is used to obtain an isochromatic retardation of the sample when the four light intensity images have sufficient light intensity values. The isochromatic intensifying procedure is used to calculate two enhanced light intensity values, the background of intensified isochromatic light intensity value and the amplitude of intensified isochromatic light intensity value to obtain an isochromatic retardation when the sample is in a low stress condition. The transformation procedure is used to transform the isochromatic retardation to a stress value of the sample.
    Type: Application
    Filed: June 9, 2017
    Publication date: June 14, 2018
    Inventors: Wei-Chung WANG, Po-Chi SUNG, Zheng-Yong LU, Yu-Liang YEH, Po-Yu CHEN