Patents by Inventor Takeo Ookura

Takeo Ookura 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).

  • Light guide for light source device and method for manufacturing the same
    Patent number: 8676005
    Abstract: A light guide for a light source device includes a core layer which is formed from a transparent resin and has a refractive index n1 and cladding layers which are provided on both surfaces thereof and have a refractive index n2 which is lower than the refractive index n1 of the core layer. A light reflecting layer which scatters and reflects light is provided in the front surface of one cladding layer, the front surface of the other cladding layer is set as a light emitting face, and a recess is provided which reaches from at least one of either of the front surface of the one cladding layer or the front surface of the other cladding layer to the core layer passing through the cladding layer.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: March 18, 2014
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kenji Yagi, Tadashi Suga, Masafumi Kitamura, Satoshi Miyadera, Takeo Ookura, Tetsuya Suda
  • Light Guide for Light Source Device and Method for Manufacturing the Same
    Publication number: 20110255835
    Abstract: A light guide for a light source device includes a core layer which is formed from a transparent resin and has a refractive index n1 and cladding layers which are provided on both surfaces thereof and have a refractive index n2 which is lower than the refractive index n1 of the core layer. A light reflecting layer which scatters and reflects light is provided in the front surface of one cladding layer, the front surface of the other cladding layer is set as a light emitting face, and a recess is provided which reaches from at least one of either of the front surface of the one cladding layer or the front surface of the other cladding layer to the core layer passing through the cladding layer.
    Type: Application
    Filed: December 25, 2009
    Publication date: October 20, 2011
    Inventors: Kenji Yagi, Tadashi Suga, Masafumi Kitamura, Satoshi Miyadera, Takeo Ookura, Tetsuya Suda