Patents by Inventor Fang-Cih Shih

Fang-Cih Shih 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).

  • Tunable terahertz achromatic wave plate and a terahertz achromatic range tuning method
    Patent number: 10353245
    Abstract: A tunable terahertz achromatic wave plate including at least three phase retarders and a tuning device is provided. The at least three phase retarders are sequentially arranged along a first direction, and configured to provide an achromatic range in a terahertz band, so as to reduce a chromatic aberration of a terahertz wave through the tunable terahertz achromatic wave plate in the achromatic range. The at least three phase retarders respectively include a liquid crystal cell. The tuning device is configured to tune a liquid crystal orientation angle of the liquid crystal cell, so as to correspondingly change a birefringence of the at least three phase retarders in the terahertz band. The terahertz wave through the tunable terahertz achromatic wave plate has same phase retardation in the achromatic range. The achromatic range in the terahertz band is determined according to the birefringence of the at least three phase retarders.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: July 16, 2019
    Assignee: National Tsing Hua University
    Inventors: Ci-Ling Pan, Chan-Shan Yang, Ru-Pin Pan, Cho-Fan Hsieh, Fang-Cih Shih
  • TUNABLE TERAHERTZ ACHROMATIC WAVE PLATE AND A TERAHERTZ ACHROMATIC RANGE TUNING METHOD
    Publication number: 20180017822
    Abstract: A tunable terahertz achromatic wave plate including at least three phase retarders and a tuning device is provided. The at least three phase retarders are sequentially arranged along a first direction, and configured to provide an achromatic range in a terahertz band, so as to reduce a chromatic aberration of a terahertz wave through the tunable terahertz achromatic wave plate in the achromatic range. The at least three phase retarders respectively include a liquid crystal cell. The tuning device is configured to tune a liquid crystal orientation angle of the liquid crystal cell, so as to correspondingly change a birefringence of the at least three phase retarders in the terahertz band. The terahertz wave through the tunable terahertz achromatic wave plate has same phase retardation in the achromatic range. The achromatic range in the terahertz band is determined according to the birefringence of the at least three phase retarders.
    Type: Application
    Filed: August 18, 2016
    Publication date: January 18, 2018
    Applicant: National Tsing Hua University
    Inventors: Ci-Ling Pan, Chan-Shan Yang, Ru-Pin Pan, Cho-Fan Hsieh, Fang-Cih Shih