Patents by Inventor YU-FAN PU

YU-FAN PU 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).

  • Method and apparatus for measuring errors of movable platform in multiple degrees of freedom
    Patent number: 10502559
    Abstract: The present invention relates to a method and an apparatus for measuring errors of a movable platform in multiple degrees of freedom. A light-source module disposed on a fixed platform emits light to a lens module disposed on a movable platform. The light is reflected to one or more optoelectronic sensing module on the fixed platform via the lenses of the lens module. Then a processing unit calculates an alignment error or/and one or more straightness error or/and one or more angle error of the movable platform according to the signal generated by the optoelectronic sensing module.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: December 10, 2019
    Assignee: National Chung Cheng University
    Inventors: Chien-Sheng Liu, Yu-Ta Chen, Yu-Fan Pu, Yong-Tai Luo
  • METHOD AND APPARATUS FOR MEASURING ERRORS OF MOVABLE PLATFORM IN MULTIPLE DEGREES OF FREEDOM
    Publication number: 20180180410
    Abstract: The present invention relates to a method and an apparatus for measuring errors of a movable platform in multiple degrees of freedom. A light-source module disposed on a fixed platform emits light to a lens module disposed on a movable platform. The light is reflected to one or more optoelectronic sensing module on the fixed platform via the lenses of the lens module. Then a processing unit calculates an alignment error or/and one or more straightness error or/and one or more angle error of the movable platform according to the signal generated by the optoelectronic sensing module.
    Type: Application
    Filed: March 24, 2017
    Publication date: June 28, 2018
    Inventors: CHIEN-SHENG LIU, YU-TA CHEN, YU-FAN PU, YONG-TAI LUO