Patents by Inventor Katsumi Kamiya

Katsumi Kamiya 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).

  • Method for producing a hologram and a display device using the same
    Publication number: 20020097457
    Abstract: A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio &eegr;R0/&eegr;00 of a first diffraction efficiency &eegr;00 and a second diffraction efficiency &eegr;R0, is calculated. The diffraction efficiency &eegr;00 is dependent on two object light beams. The efficiency &eegr;R0 is dependent on the object light and the reference light. In a second step, the intensity E0 of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio &eegr;R0/&eegr;00 is set to at least 10 and the efficiency &eegr;00 does not exceed 5%.
    Type: Application
    Filed: February 20, 2002
    Publication date: July 25, 2002
    Inventors: Tomoyuki Kanda, Kazutoshi Koie, Katsuyoshi Nishii, Masahiro Shiozawa, Katsumi Kamiya, Atsuo Ishizuka, Kenichiro Takada
  • Method for producing a hologram and a display device using the same
    Patent number: 6198554
    Abstract: A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio &eegr;RO/&eegr;OO of a first diffraction efficiency &eegr;OO and a second diffraction efficiency &eegr;RO, is calculated. The diffraction efficiency &eegr;OO is dependent on two object light beams. The efficiency &eegr;RO is dependent on the object light and the reference light. In a second step, the intensity EO of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio &eegr;RO/&eegr;OO is set to at least 10 and the efficiency &eegr;OO does not exceed 5%.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: March 6, 2001
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Tomoyuki Kanda, Kazutoshi Koie, Katsuyoshi Nishii, Masahiro Shiozawa, Katsumi Kamiya, Atsuo Ishizuka
  • Method for producing a hologram and a display device using the same
    Patent number: 6163390
    Abstract: A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio .eta..sub.R0 /.eta..sub.00 of a first diffraction efficiency .eta..sub.00 and a second diffraction efficiency .eta..sub.R0, is calculated. The diffraction efficiency .eta..sub.00 is dependent on two object light beams. The efficiency .eta..sub.R0 is dependent on the object light and the reference light. In a second step, the intensity E.sub.O of the object light and the intensity E.sub.R of the reference light is adjusted in such a way that the ratio .eta..sub.R0 /.eta..sub.00 is set to at least 10 and the efficiency .eta..sub.00 does not exceed 5%.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: December 19, 2000
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Tomoyuki Kanda, Kazutoshi Koie, Katsuyoshi Nishii, Masahiro Shiozawa, Katsumi Kamiya, Atsuo Ishizuka, Kenichiro Takada