Patents by Inventor Atsushi Shibukawa

Atsushi Shibukawa 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).

  • Highly scattering metasurface phase masks for complex wavefront engineering
    Patent number: 10732437
    Abstract: Complex wavefront engineering is realized through a random metasurface phase mask backed by a phase-only spatial light modulator. The metasurface consists of an array of subwavelength nanoscatterers which give the metasurface a pre-arranged disorder. Since the transmission matrix of the disordered metasurface is known, there is no need for extensive characterization measurements which are instead required in standard disordered optical devices.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: August 4, 2020
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Mooseok Jang, Yu Horie, Atsushi Shibukawa, Andrei Faraon, Changhuei Yang
  • Highly Scattering Metasurface Phase Masks for Complex Wavefront Engineering
    Publication number: 20190113775
    Abstract: Complex wavefront engineering is realized through a random metasurface phase mask backed by a phase-only spatial light modulator. The metasurface consists of an array of subwavelength nanoscatterers which give the metasurface a pre-arranged disorder. Since the transmission matrix of the disordered metasurface is known, there is no need for extensive characterization measurements which are instead required in standard disordered optical devices.
    Type: Application
    Filed: April 19, 2018
    Publication date: April 18, 2019
    Inventors: Mooseok JANG, Yu HORIE, Atsushi SHIBUKAWA, Andrei FARAON, Changhuei YANG
  • Infrared-to-visible up-conversion material
    Patent number: 5541012
    Abstract: A new infrared-to-visible up-conversion material is provided which can be applied to an infrared light identification element having a useful conversion efficiency and sensitivity for infrared light in the wavelength of 1.5 .mu.m band, 0.98 .mu.m band and 0.8 .mu.m band without the necessity of previous excitation of the material. This infrared-to-visible up-conversion material consists of an inorganic material comprising at least two elements of erbium (Er) and a halogen or compounds thereof.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: July 30, 1996
    Assignees: Nippon Telegraph and Telephone Corporation, Sumita Optical Glass, Inc.
    Inventors: Junichi Ohwaki, Yuhu Wang, Atsushi Shibukawa, Naruhito Sawanobori, Shinobu Nagahama