Patents by Inventor Toshiya Sakuma

Toshiya Sakuma 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).

  • Optical device with barrier layer, optical system, and projector apparatus
    Patent number: 6771420
    Abstract: An optical device has a light-transmitting optical substrate formed with a multilayer film and a barrier layer disposed on the multilayer film side thereof. The light-transmitting optical substrate has a refractive index Ns (at a reference wavelength of 632.8 nm) falling within the range of 1.7≦Ns≦1.9, whereas the barrier layer has a refractive index Nb (at a reference wavelength of 632.8 nm) falling within the range of −0.1≦Nb−Ns≦0.1.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: August 3, 2004
    Assignees: Fuji Photo Optical Co., Ltd., Victor Company of Japan, Ltd.
    Inventors: Naoki Ozawa, Atsushi Enomoto, Kenji Yasuda, Yoshio Kojima, Satoru Moriya, Masanobu Shigeta, Toshiya Sakuma
  • Optical device with barrier layer, optical system, and projector apparatus
    Publication number: 20030137738
    Abstract: An optical device comprises a light-transmitting optical substrate formed with a multilayer film and a barrier layer disposed on the multilayer film side thereof. The light-transmitting optical substrate has a refractive index Ns (at a reference wavelength of 632.8 nm) falling within the range of 1.7≦Ns≦1.9, whereas the barrier layer has a refractive index Nb (at a reference wavelength of 632.8 nm) falling within the range of −0.1≦Nb−Ns≦0.1.
    Type: Application
    Filed: December 26, 2002
    Publication date: July 24, 2003
    Applicant: Fuji Photo Optical Co., Ltd.
    Inventors: Naoki Ozawa, Atsushi Enomoto, Kenji Yasuda, Yoshio Kojima, Satoru Moriya, Masanobu Shigeta, Toshiya Sakuma