Patents by Inventor Koji Kitahara

Koji Kitahara 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).

  • Patent number: 10473913
    Abstract: An etalon includes a first substrate, a second substrate facing the first substrate, a fixed mirror provided on a surface of the first substrate that faces the second substrate, a movable mirror provided on the second substrate and facing the fixed mirror via an inter-mirror gap, and a first electrode provided on the surface of the first substrate that faces the second substrate. A first multilayer stopper portion is provided by a portion of the first electrode being stacked with at least a portion of an outer circumferential edge of the fixed mirror.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: November 12, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Akira Sano, Yasushi Matsuno, Koji Kitahara
  • Patent number: 10007106
    Abstract: An optical filter includes a stationary substrate and a movable substrate disposed so as to be opposed to each other, a first reflecting film disposed on a movable substrate side of the stationary substrate, a second reflecting film disposed on a stationary substrate side of the movable substrate, and opposed to the first reflecting film, a first protective film disposed so as to overlap the first reflecting film, and having a light transmissive property and electrical conductivity, a second protective film disposed so as to overlap the second reflecting film, and having a light transmissive property and electrical conductivity, a first terminal connected to the first protective film, and a second terminal connected to the second protective film. An electrical connection of the first terminal and the second terminal is electrically switchable.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: June 26, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Susumu Shinto, Koji Kitahara
  • Publication number: 20180157027
    Abstract: A wavelength tunable interference filter includes a fixed substrate, a movable substrate facing the fixed substrate, a fixed reflective film provided on the fixed substrate, a movable reflective film provided on the movable substrate and facing the fixed reflective film with an inter-reflective film gap interposed therebetween, a first wiring electrode provided on the fixed substrate, and a first conductive member provided on the fixed substrate. The fixed reflective film is connected to the first wiring electrode through the first conductive member, and the thickness of the first conductive member is less than the thickness of the first wiring electrode.
    Type: Application
    Filed: February 5, 2018
    Publication date: June 7, 2018
    Inventor: Koji KITAHARA
  • Publication number: 20180129035
    Abstract: An etalon includes a first substrate, a second substrate facing the first substrate, a fixed mirror provided on a surface of the first substrate that faces the second substrate, a movable mirror provided on the second substrate and facing the fixed mirror via an inter-mirror gap, and a first electrode provided on the surface of the first substrate that faces the second substrate. A first multilayer stopper portion is provided by a portion of the first electrode being stacked with at least a portion of an outer circumferential edge of the fixed mirror.
    Type: Application
    Filed: January 10, 2018
    Publication date: May 10, 2018
    Inventors: Akira SANO, Yasushi MATSUNO, Koji KITAHARA
  • Patent number: 9588333
    Abstract: A wavelength tunable interference filter includes an electrostatic actuator that changes the dimension of a gap between a fixed reflection film and a movable reflection film, a fixed drawn electrode and a movable drawn electrode that are connected to the electrostatic actuator, and a third substrate having a top surface portion and a sidewall portion. An end surface of the sidewall portion is bonded to a first substrate so that a space surrounded by the top surface portion, the sidewall portion, and the first substrate is hermetically sealed. A second substrate and the electrostatic actuator are disposed in the space, and the fixed drawn electrode and the movable drawn electrode are disposed on the first substrate and extend both inside and outside the space.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: March 7, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Akira Sano, Koji Kitahara
  • Patent number: 9447267
    Abstract: It is an object of the present invention to provide a modified polypropylene composition for forming laminates, which enables prevention of lowering of interlaminar bond strength even in the case where it is subjected to high-speed molding or subjected to stretch molding, and a laminate using the composition and having excellent interlaminar bond properties. The present invention relates to a modified polypropylene composition comprising a propylene-based polymer (A-1), 0 to 45% by weight of a propylene-based polymer (A-2), an ethylene/?-olefin copolymer (B) having a melt flow rate (MFR; ASTM D1238, 230° C., load of 2.16 kg) of 0.01 to 40 g/10 min and a density (ASTM D1505) of not more than 0.900 g/cm3, and a specific amount of modified polypropylene (C) a part or all of which has been graft-modified with an unsaturated carboxylic acid or a derivative thereof.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: September 20, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Hironori Matsumoto, Hirotaka Uosaki, Koji Kitahara, Yuji Sawada
  • Patent number: 9322966
    Abstract: An interference filter includes first and second reflecting films opposed to each other across a gap, the first and second reflecting films include an Ag—Sm—Cu alloy film or an Ag—Bi—Nd alloy film, the Ag—Sm—Cu alloy film includes 0.1 atomic %?Sm?0.5 atomic %, and 0.1 atomic %?Cu and ?0.5 atomic %, and Sm+Cu?1.0 atomic %, the Ag—Bi—Nd alloy film includes 0.1 atomic %?Bi?3.0 atomic %, and 0.1 atomic %?Nd?5.0 atomic %, and the thickness of the Ag—Sm—Cu alloy film or the Ag—Bi—Nd alloy film is ?10 nm and ?40 nm.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: April 26, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Susumu Shinto, Koji Kitahara, Tomonori Matsushita
  • Publication number: 20150253564
    Abstract: An interference filter has a fixed mirror and a movable mirror that are formed of Ag—Sm—Cu alloy films that contain silver (Ag), samarium (Sm), and copper (Cu), or Ag—Bi—Nd alloy films that contains silver (Ag), bismuth (Bi), and neodymium (Nd).
    Type: Application
    Filed: May 20, 2015
    Publication date: September 10, 2015
    Inventors: Susumu SHINTO, Koji KITAHARA
  • Publication number: 20150248005
    Abstract: A light filter includes a fixed substrate, a movable portion which is arranged to face the fixed substrate, a fixed reflective film which is disposed on the fixed substrate, and reflects a part of light and transmits a part of the light, a movable reflective film which is disposed on the movable portion to face the fixed reflective film, and reflects a part of the light and transmits a part of the light, and an electrostatic actuator which controls a distance between the fixed reflective film and the movable reflective film, the fixed reflective film is interposed between a conductive film and a protective film, and the conductive film and the protective film are formed of the same material, and have the same film thickness.
    Type: Application
    Filed: February 25, 2015
    Publication date: September 3, 2015
    Inventors: Susumu SHINTO, Koji KITAHARA, Tomoki SAKASHITA
  • Publication number: 20150248004
    Abstract: A light filter includes a fixed substrate, a movable portion which is arranged to face the fixed substrate, a fixed reflective film which is disposed in the fixed substrate, and reflects a part of light and transmits a part of the light, a movable reflective film which is disposed in the movable portion, faces the fixed reflective film, and reflects a part of the light and transmits a part the light, and a control unit which controls a distance between the fixed reflective film and the movable reflective film, a conductive film is disposed between the fixed reflective film and the fixed substrate, and a reflective film terminal is disposed on the conductive film, and a conductive film is disposed between the movable reflective film and the movable portion, and a third terminal is disposed on the conductive film.
    Type: Application
    Filed: February 24, 2015
    Publication date: September 3, 2015
    Inventors: Tomoki SAKASHITA, Susumu SHINTO, Koji KITAHARA
  • Publication number: 20150124324
    Abstract: A wavelength variable interference filter includes: a first movable mirror disposed on a first substrate; a second movable mirror disposed so as to be opposed to the first movable mirror with a predetermined gap interposed therebetween; and an electrostatic actuator which varies the length of the gap between the mirrors. The first substrate has a first movable portion on which the first movable mirror is disposed, and a first linkage portion which holds the first movable portion in such a manner that the first movable portion can shift in the thickness direction of the substrate. The second substrate has a second movable portion on which the second movable mirror is disposed, and a second linkage portion which holds the second movable portion in such a manner that the second movable portion can shift in the thickness direction of the substrate.
    Type: Application
    Filed: January 7, 2015
    Publication date: May 7, 2015
    Inventors: Nozomu HIROKUBO, Koji KITAHARA
  • Patent number: 8970957
    Abstract: An etalon (tunable interference filter) includes a fixed substrate, a movable substrate facing the fixed substrate, a fixed reflection film disposed on the fixed substrate, a movable reflection film disposed on the movable substrate and facing the fixed reflection film via a gap, a fixed electrode disposed on the fixed substrate, and a movable electrode disposed on the movable substrate and facing the fixed electrode. A movable insulating film is stacked on a surface of the movable electrode on the side of the fixed electrode, the movable electrode has a compressive stress, and the movable insulating film has a tensile stress.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: March 3, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Koji Kitahara
  • Publication number: 20150042362
    Abstract: An optical filter includes a stationary substrate and a movable substrate disposed so as to be opposed to each other, a first reflecting film disposed on a movable substrate side of the stationary substrate, a second reflecting film disposed on a stationary substrate side of the movable substrate, and opposed to the first reflecting film, a first protective film disposed so as to overlap the first reflecting film, and having a light transmissive property and electrical conductivity, a second protective film disposed so as to overlap the second reflecting film, and having a light transmissive property and electrical conductivity, a first terminal connected to the first protective film, and a second terminal connected to the second protective film. An electrical connection of the first terminal and the second terminal is electrically switchable.
    Type: Application
    Filed: August 6, 2014
    Publication date: February 12, 2015
    Inventors: Susumu SHINTO, Koji KITAHARA
  • Patent number: 8947782
    Abstract: A wavelength variable interference filter includes: a first movable mirror disposed on a first substrate; a second movable mirror disposed so as to be opposed to the first movable mirror with a predetermined gap interposed therebetween; and an electrostatic actuator which varies the length of the gap between the mirrors. The first substrate has a first movable portion on which the first movable mirror is disposed, and a first linkage portion which holds the first movable portion in such a manner that the first movable portion can shift in the thickness direction of the substrate. The second substrate has a second movable portion on which the second movable mirror is disposed, and a second linkage portion which holds the second movable portion in such a manner that the second movable portion can shift in the thickness direction of the substrate.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: February 3, 2015
    Assignee: Seiko Epson Company
    Inventors: Nozomu Hirokubo, Koji Kitahara
  • Patent number: 8848292
    Abstract: An optical filter comprising a first substrate, a second substrate having a support portion which supports the first substrate, a first optical film provided on the first substrate, a second optical film provided on the second substrate and arranged to face the first optical film, a first protective film covering at least the first optical film, a second protective film covering at least the second optical film, a first bonding film, a portion of the first bonding film overlapping a surface of the first protective film in a plan view but does not overlapping the first optical film and a second bonding film, a portion of the second bonding film overlapping a surface of the second protective film in the plan view but does not overlapping the second optical film.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 30, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Koji Kitahara, Tomoki Sakashita
  • Publication number: 20140191116
    Abstract: A wavelength tunable interference filter includes an electrostatic actuator that changes the dimension of a gap between a fixed reflection film and a movable reflection film, a fixed drawn electrode and a movable drawn electrode that are connected to the electrostatic actuator, and a third substrate having a top surface portion and a sidewall portion. An end surface of the sidewall portion is bonded to a first substrate so that a space surrounded by the top surface portion, the sidewall portion, and the first substrate is hermetically sealed. A second substrate and the electrostatic actuator are disposed in the space, and the fixed drawn electrode and the movable drawn electrode are disposed on the first substrate and extend both inside and outside the space.
    Type: Application
    Filed: December 30, 2013
    Publication date: July 10, 2014
    Inventors: Akira SANO, Koji KITAHARA
  • Publication number: 20140091211
    Abstract: A wavelength tunable interference filter includes a fixed substrate, a movable substrate facing the fixed substrate, a fixed reflective film provided on the fixed substrate, a movable reflective film provided on the movable substrate and facing the fixed reflective film with an inter-reflective film gap interposed therebetween, a first wiring electrode provided on the fixed substrate, and a first conductive member provided on the fixed substrate. The fixed reflective film is connected to the first wiring electrode through the first conductive member, and the thickness of the first conductive member is less than the thickness of the first wiring electrode.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 3, 2014
    Applicant: Seiko Epson Corporation
    Inventor: Koji Kitahara
  • Patent number: 8593723
    Abstract: A method of manufacturing a variable wavelength interference filter includes forming an electrostatic gap forming groove, a wiring forming groove extending from the electrostatic gap forming groove to an outer peripheral edge of the chip region, and an air communication groove through which the wiring groove forming groove communicates with the outside of the first substrate, in a chip region of a first substrate.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: November 26, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Koji Kitahara, Akira Sano
  • Publication number: 20130273386
    Abstract: It is an object of the present invention to provide a modified polypropylene composition for forming laminates, which enables prevention of lowering of interlaminar bond strength even in the case where it is subjected to high-speed molding or subjected to stretch molding, and a laminate using the composition and having excellent interlaminar bond properties. The present invention relates to a modified polypropylene composition comprising a propylene-based polymer (A-1), 0 to 45% by weight of a propylene-based polymer (A-2), an ethylene/?-olefin copolymer (B) having a melt flow rate (MFR; ASTM D1238, 230° C., load of 2.16 kg) of 0.01 to 40 g/10 min and a density (ASTM 91505) of not more than 0.900 g/cm3, and a specific amount of modified polypropylene (C) a part or all of which has been graft-modified with an unsaturated carboxylic acid or a derivative thereof.
    Type: Application
    Filed: December 7, 2011
    Publication date: October 17, 2013
    Inventors: Hironori Matsumoto, Hirotaka Uosaki, Koji Kitahara, Yuji Sawada
  • Patent number: 8369713
    Abstract: In the present invention, unlike a conventional circuit, discrimination is not made by integrating a logical code that includes “0” and “1” to some extent and produced from a random code, but repetition of an identical pattern of a well-known preamble signal added to a head portion of a signal is discriminated when a bit-rate of the signal is changed. More specifically, the repetition of the identical pattern is converted into a consecutive identical signal to generate the consecutive identical signal (having a length of tens bits to thousands bits). Although the consecutive identical signal is longer than a same-code continuation length included in the signal, and is shorter than a time constant necessary to the conventional circuit by about one to three digits. Therefore, an integration time can be shortened to the same degree as the generated consecutive identical signal length, and the bit-rate can be discriminated at high speed within a preamble signal receiving time.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: February 5, 2013
    Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation
    Inventors: Kazutaka Hara, Shunji Kimura, Hirotaka Nakamura, Koji Kitahara, Yoshikazu Urabe, Masahiro Endo