Patents by Inventor Kazumasa UETSUKI

Kazumasa UETSUKI 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).

  • Total internal reflection prism for use with digital micromirror devices
    Patent number: 10578776
    Abstract: A total internal reflection prism, for use with a digital micromirror device (DMD), is provided. The total internal reflection prism comprises: a DMD-facing side; an air gap internal to the TIR prism, the air gap including a total internal reflection (TIR) surface; and an anti-reflective (AR) coating at the TIR surface of the air gap, the AR coating one or more of: optimized for transmission of DMD off-state light through the air gap; and having higher transmission at a DMD off-state angle than at an angle where one or more of illumination light and DMD on-state light are transmitted through the air gap.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: March 3, 2020
    Assignee: CHRISTIE DIGITAL SYSTEMS USA, INC.
    Inventor: Kazumasa Uetsuki
  • TOTAL INTERNAL REFLECTION PRISM FOR USE WITH DIGITAL MICROMIRROR DEVICES
    Publication number: 20180329116
    Abstract: A total internal reflection prism, for use with a digital micromirror device (DMD), is provided. The total internal reflection prism comprises: a DMD-facing side; an air gap internal to the TIR prism, the air gap including a total internal reflection (TIR) surface; and an anti-reflective (AR) coating at the TIR surface of the air gap, the AR coating one or more of: optimized for transmission of DMD off-state light through the air gap; and having higher transmission at a DMD off-state angle than at an angle where one or more of illumination light and DMD on-state light are transmitted through the air gap.
    Type: Application
    Filed: May 15, 2017
    Publication date: November 15, 2018
    Inventor: Kazumasa UETSUKI