Patents by Inventor Guan-Ting LAI

Guan-Ting LAI 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 quantifying unknown stress and residual stress of a material and method thereof
    Patent number: 8780348
    Abstract: An apparatus for quantifying unknown stress and residual stress of a material to be tested, the material being a birefringent or temporary birefringent material, which includes a light source, a polarizer in front of the light source for converting a light beam from the light source into a beam with linear polarization, a first quarter-wave plate in front of the polarizer for generating circular polarization, a standard material, a second quarter-wave plate, an analyzer, a loading unit, a spectrometer for obtaining transmissivity spectrum of the standard material under the wavelength of the light source and a detecting module connected to the spectrometer to have the transmissivity spectrum of the material to be tested and consequently a stress quantifying formula for the standard material.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: July 15, 2014
    Assignee: National Tsing Hua University
    Inventors: Wei-Chung Wang, Chi-Hung Huang, Po-Chi Sung, Wei-Ren Chen, Guan-Ting Lai
  • APPARATUS FOR QUANTIFYING UNKNOWN STRESS AND RESIDUAL STRESS OF A MATERIAL AND METHOD THEREOF
    Publication number: 20130250277
    Abstract: An apparatus for quantifying unknown stress and residual stress of a material to be tested, the material being a birefringent or temporary birefringent material, which includes a light source, a polarizer in front of the light source for converting a light beam from the light source into a beam with linear polarization, a first quarter-wave plate in front of the polarizer for generating circular polarization, a standard material, a second quarter-wave plate, an analyzer, a loading unit, a spectrometer for obtaining transmissivity spectrum of the standard material under the wavelength of the light source and a detecting module connected to the spectrometer to have the transmissivity spectrum of the material to be tested and consequently a stress quantifying formula for the standard material.
    Type: Application
    Filed: September 18, 2012
    Publication date: September 26, 2013
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Wei-Chung WANG, Chi-Hung HUANG, Po-Chi SUNG, Wei-Ren CHEN, Guan-Ting LAI