Patents by Inventor Hitosh Hara

Hitosh Hara 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).

  • Fabry-Perot filter, wavelength-selective infrared detector and infrared gas analyzer using the filter and detector
    Patent number: 6590710
    Abstract: A Fabry-Perot filter device for selectively transmitting three wavelength bands of infrared radiation, including a reference light band, wherein the filter device comprises a fixed mirror formed on a substrate; a movable mirror arranged opposite to the fixed mirror with a gap formed therebetween so that the movable mirror is displaced with respect to the fixed mirror by applying an external force; a fixed electrode formed on the fixed mirror; and a movable electrode formed on the movable mirror and arranged opposite to the fixed electrode wherein the movable electrode is displaced by applying a potential difference across the fixed and movable electrodes so that the width of the gap is varied in at least three steps, whereby at least three wavelength bands of infrared radiation are selectively transmitted through the filter device.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: July 8, 2003
    Assignee: Yokogawa Electric Corporation
    Inventors: Hitosh Hara, Naoki Kishi, Makoto Noro, Hideto Iwaoka, Kentaro Suzuki
  • Fabry-perot filter, wavelength-selective infrared detector and infrared gas analyzer using the filter and detector
    Publication number: 20030116711
    Abstract: A Fabry-Perot filter device for selectively transmitting three wavelength bands of infrared radiation, including a reference light band, wherein the filter device comprises a fixed mirror formed on a substrate; a movable mirror arranged opposite to the fixed mirror with a gap formed therebetween so that the movable mirror is displaced with respect to the fixed mirror by applying an external force; a fixed electrode formed on the fixed mirror; and a movable electrode formed on the movable mirror and arranged opposite to the fixed electrode wherein the movable electrode is displaced by applying a potential difference across the fixed and movable electrodes so that the width of the gap is varied in at least three steps, whereby at least three wavelength bands of infrared radiation are selectively transmitted through the filter device.
    Type: Application
    Filed: December 5, 2002
    Publication date: June 26, 2003
    Applicant: YOKOGAWA ELECTRIC CORPORATION, a Japan corporation
    Inventors: Hitosh Hara, Naoki Kishi, Makoto Noro, Hideto Iwaoka, Kentaro Suzuki
  • Fabry-perot filter, wavelength-selective infrared detector and infrared gas analyzer using the filter and detector
    Publication number: 20010015810
    Abstract: A Fabry-Perot filter device for selectively transmitting three wavelength bands of infrared radiation, including a reference light band, wherein the filter device comprises a fixed mirror formed on a substrate; a movable mirror arranged opposite to the fixed mirror with a gap formed therebetween so that the movable mirror is displaced with respect to the fixed mirror by applying an external force; a fixed electrode formed on the fixed mirror; and a movable electrode formed on the movable mirror and arranged opposite to the fixed electrode wherein the movable electrode is displaced by applying a potential difference across the fixed and movable electrodes so that the width of the gap is varied in at least three steps, whereby at least three wavelength bands of infrared radiation are selectively transmitted through the filter device.
    Type: Application
    Filed: February 5, 2001
    Publication date: August 23, 2001
    Inventors: Hitosh Hara, Naoki Kishi, Makoto Noro, Hideto Iwaoka, Kentaro Suzuki