Patents by Inventor Takashi Kasahara

Takashi Kasahara 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).

  • Publication number: 20210212801
    Abstract: A dental coupling member which can easily adjust the position of the lower jaw of the user without increasing the size of the coupling member is provided. The dental coupling member is attached to upper and lower oral appliances to couple them, and regulates displacement of the lower oral appliance to rear side. The dental coupling member has; an outer which is a cylindrical member having a through hole, to be attached to one oral appliance; an inner having a rod-shaped insertion portion to be inserted into an interior of the cylindrical portion and slidably held by the outer, the inner to be attached to the other oral appliance; and a stopper adjustably positioned inside the cylindrical portion, the stopper serve to limit a slide width of the insertion portion inside the cylindrical portion by adjustment of its position along the axial direction of the cylindrical portion.
    Type: Application
    Filed: March 20, 2019
    Publication date: July 15, 2021
    Inventors: Takashi Yukita, Haruka Sugita, Akira Hasegawa, Yasufumi Tsuchiya, Takehiro Ishiguro, Chiaki Endo, Kenichi Kasahara, Kohei Yazaki, Toshiaki Donuma, You Sato, Daigo Hama
  • Patent number: 11054560
    Abstract: A Fabry-Perot interference filter includes: a substrate having a first surface and a second surface facing each other; a first layer structure disposed on the first surface; and a second layer structure disposed on the second surface, wherein the first layer structure is provided with a first mirror portion and a second mirror portion facing each other with an air gap therebetween, and a distance between the first mirror portion and the second mirror portion is varied, and the second layer structure is formed with a separation region separating at least a part of the second layer structure into one side and another side in a direction along the second surface.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: July 6, 2021
    Assignee: HAMAMATSU PHOTONICS K.K
    Inventors: Toshimitsu Kawai, Katsumi Shibayama, Takashi Kasahara, Masaki Hirose, Hiroki Oyama, Yumi Teramachi
  • Patent number: 11041755
    Abstract: A method of manufacturing a Fabry-Perot interference filter includes a forming step of forming a first mirror layer having a plurality of first mirror portions, a sacrificial layer having a plurality of portions expected to be removed, and a second mirror layer having a plurality of second mirror portions on a first main surface of a wafer which includes parts corresponding to a plurality of two-dimensionally arranged substrates and is expected to be cut into the plurality of substrates along each of a plurality of lines; a removing step of simultaneously removing the plurality of two-dimensionally arranged portions expected to be removed from the sacrificial layer through etching after the Ruining step; and a cutting step of cutting the wafer into the plurality of substrates along each of the plurality of lines after the removing step.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: June 22, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi Kasahara, Katsumi Shibayama, Masaki Hirose, Toshimitsu Kawai, Hiroki Oyama, Yumi Kuramoto
  • Patent number: 11035726
    Abstract: A light detection device includes a package including a window, a Fabry-Perot interference filter for transmitting light incident from the window in the package, and a light detector for detecting the light transmitted by the Fabry-Perot interference filter in the package. The Fabry-Perot interference filter includes: a substrate having a first surface on the window side and a second surface on the light detector side; a first layer structure arranged on the first surface, the first layer structure having a first mirror and a second mirror; and a lens unit integrally formed on the second surface side, the lens unit for condensing the light transmitted by the first mirror and the second mirror onto the light detector.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: June 15, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi Kasahara, Katsumi Shibayama, Masaki Hirose, Toshimitsu Kawai, Hiroki Oyama, Yumi Kuramoto
  • Publication number: 20210131870
    Abstract: A method of manufacturing a Fabry-Perot interference filter includes a forming step of forming a first thinned region, a first mirror layer, a sacrificial layer, and a second mirror layer are formed on a first main surface of a wafer, and the first thinned region in which at least one of the first mirror layer, the sacrificial layer, and the second mirror layer is partially thinned along each of a plurality of lines is formed; a cutting step of cutting the wafer into a plurality of substrates along each of the plurality of lines by forming a modified region within the wafer along each of the plurality of lines through irradiation of a laser light, after the forming step; and a removing step of removing a portion from the sacrificial layer through etching, between the forming step and the cutting step or after the cutting step.
    Type: Application
    Filed: December 18, 2020
    Publication date: May 6, 2021
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi KASAHARA, Katsumi SHIBAYAMA, Masaki HIROSE, Toshimitsu KAWAI, Hiroki OYAMA, Yumi KURAMOTO
  • Publication number: 20210116297
    Abstract: A light detection device includes a package including a window, a Fabry-Perot interference filter for transmitting light incident from the window in the package, and a light detector for detecting the light transmitted by the Fabry-Perot interference filter in the package. The Fabry-Perot interference filter includes: a substrate having a first surface on the window side and a second surface on the light detector side; a first layer structure arranged on the first surface, the first layer structure having a first mirror and a second mirror, and a lens unit integrally formed on the second surface side, the lens unit for condensing the light transmitted by the first mirror and the second mirror onto the light detector.
    Type: Application
    Filed: February 26, 2018
    Publication date: April 22, 2021
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi KASAHARA, Katsumi SHIBAYAMA, Masaki HIROSE, Toshimitsu KAWAI, Hiroki OYAMA, Yumi KURAMOTO
  • Patent number: 10935419
    Abstract: A light detection device includes: a package including an opening configured to allow light to enter therefrom; a light transmitting unit arranged on an inner surface of the package so as to close the opening; a Fabry-Perot interference filter arranged in the package and configured to transmit light transmitted by the light transmitting unit; and a light detector arranged in the package and configured to detect the light transmitted by the Fabry-Perot interference filter. The light transmitting unit is integrally configured by including: a band pass filter arranged in the package and configured to transmit the light to be incident on the Fabry-Perot interference filter; and at least one lens unit configured to condense the light to be incident on the Fabry-Perot interference filter.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: March 2, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Masaki Hirose, Katsumi Shibayama, Takashi Kasahara, Toshimitsu Kawai, Hiroki Oyama, Yumi Kuramoto
  • Patent number: 10908022
    Abstract: A method of manufacturing a Fabry-Perot interference filter includes a forming step of forming a first thinned region, a first mirror layer, a sacrificial layer, and a second mirror layer are formed on a first main surface of a wafer, and the first thinned region in which at least one of the first mirror layer, the sacrificial layer, and the second mirror layer is partially thinned along each of a plurality of lines is formed; a cutting step of cutting the wafer into a plurality of substrates along each of the plurality of lines by forming a modified region within the wafer along each of the plurality of lines through irradiation of a laser light, after the forming step; and a removing step of removing a portion from the sacrificial layer through etching, between the forming step and the cutting step or after the cutting step.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: February 2, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi Kasahara, Katsumi Shibayama, Masaki Hirose, Toshimitsu Kawai, Hiroki Oyama, Yumi Kuramoto
  • Patent number: 10900834
    Abstract: The Fabry-Perot interference filter includes: a substrate having a first surface, a first laminate having a first mirror portion disposed on the first surface, a second laminate having a second mirror portion facing the first mirror portion with an air gap interposed therebetween, and an intermediate layer defining the air gap between the first and second laminate. The substrate has an outer edge portion positioned outside an outer edge of the intermediate layer when viewed from a direction perpendicular to the first surface. The second laminate further includes a covering portion covering the intermediate layer and a peripheral edge portion positioned on the first surface in the outer edge portion. The second mirror portion, the covering portion, and the peripheral edge portion are integrally formed so as to be continuous with each other. The peripheral edge portion is thinned along an outer edge of the outer edge portion.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: January 26, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi Kasahara, Katsumi Shibayama, Masaki Hirose, Toshimitsu Kawai, Hiroki Oyama, Yumi Kuramoto
  • Patent number: 10895501
    Abstract: A spectral sensor includes a wiring substrate which has a principal surface; a light detector which is disposed on the principal surface of the wiring substrate and is electrically connected to the wiring substrate; spacer which is disposed around the light detector, on the principal surface of the wiring substrate; and a Fabry-Perot interference filter which has a light transmission region and is disposed on the principal surface of the wiring substrate with the spacer therebetween. The spacer support the Fabry-Perot interference filter in a surrounding region of the light transmission region and the spacer is arranged to form opening communicating with an inner side of the surrounding region and an outer side of the surrounding region, when viewed from a light transmission direction in the light transmission region.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: January 19, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Katsumi Shibayama, Takashi Kasahara, Masaki Hirose, Toshimitsu Kawai
  • Patent number: 10859808
    Abstract: A immersion microscope objective includes: a first positive lens group that includes at least one positive single lens and a first cemented lens; a second positive lens group that includes a plurality of cemented lenses including a second cemented lens that is the closest to an object; a third negative lens group that includes a first lens component having a concave surface; and a fourth lens group that includes a second lens component that is the closest to the object, the second lens component having a concave surface, wherein the objective satisfies the following conditional expressions: 0.986?NAob/N0?0.995??(1) 0.0095?1/(N1×?1)?0.015??(2) where NAob indicates a numerical aperture of the objective; N0, a refractive index that an immersion liquid has for an e line; N1, a refractive index that the meniscus lens has for the e line; ?1, an Abbe number that the meniscus lens has for a d line.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: December 8, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Takashi Kasahara
  • Patent number: 10838195
    Abstract: A Fabry-Perot interference filter includes a substrate that has a first surface, a first laminate that has a first mirror portion, a second laminate that has a second mirror portion facing the first mirror portion via a gap, an intermediate layer that defines the gap between the first laminate and the second laminate, and a first terminal. The intermediate layer has a first inner surface surrounding the first terminal. The first inner surface is curved such that an edge portion of the intermediate layer on the substrate side is positioned on the first terminal side relative to an edge portion of the intermediate layer on a side opposite to the substrate.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: November 17, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi Kasahara, Katsumi Shibayama, Masaki Hirose, Toshimitsu Kawai, Hiroki Oyama, Yumi Kuramoto
  • Publication number: 20200309637
    Abstract: An electrical inspection method includes: a step of preparing a wafer in which a plurality of Fabry-Perot interference filter portions is formed, each of the plurality of Fabry-Perot interference filter portions in which a distance between a first mirror portion and a second mirror portion facing each other varies by an electrostatic force; and a step of inspecting electrical characteristics of each of the plurality of Fabry-Perot interference filter portions.
    Type: Application
    Filed: November 9, 2018
    Publication date: October 1, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi KASAHARA, Katsumi SHIBAYAMA, Masaki HIROSE, Toshimitsu KAWAI, Hiroki OYAMA, Yumi KURAMOTO
  • Publication number: 20200310105
    Abstract: A wafer includes a substrate layer, a first mirror layer having a plurality of two-dimensionally arranged first mirror portions, and a second mirror layer having a plurality of two-dimensionally arranged second mirror portions. A plurality of Fabry-Perot interference filter portions are formed in an effective area, in each of the plurality of Fabry-Perot interference filter portions a gap is formed between the first mirror portion and the second mirror portion. A plurality of dummy filter portions are formed in a dummy area disposed along an outer edge of the substrate layer and surrounding the effective area, in each of the plurality of dummy filter portions an intermediate layer is provided between the first mirror portion and the second mirror portion. At least the second mirror portion is surrounded by the first groove in each of the plurality of Fabry-Perot interference filter portions and the plurality of dummy filter portions.
    Type: Application
    Filed: November 9, 2018
    Publication date: October 1, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Toshimitsu KAWAI, Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Hiroki OYAMA, Yumi KURAMOTO
  • Publication number: 20200310112
    Abstract: A method for removing a foreign substance according to an embodiment includes: a step of preparing a Fabry-Perot interference filter in which a gap is formed between a portion of a first laminate at least including a first mirror portion and a portion of a second laminate at least including a second mirror portion facing each other so that a distance between the first mirror portion and the second mirror portion facing each other varies by an electrostatic force; a step of detecting a foreign substance adhering to a surface of the second laminate; and a step of blowing air in which an airflow peak position is adjusted on the basis of a position of the detected foreign substance onto the surface of the second laminate and thereby removing the foreign substance from the surface of the second laminate.
    Type: Application
    Filed: November 9, 2018
    Publication date: October 1, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Masaki HIROSE, Katsumi SHIBAYAMA, Takashi KASAHARA, Toshimitsu KAWAI, Hiroki OYAMA, Yumi KURAMOTO
  • Publication number: 20200310104
    Abstract: A wafer includes a substrate layer, a first mirror layer having a plurality of two-dimensionally arranged first mirror portions, and a second mirror layer having a plurality of two-dimensionally arranged second mirror portions. In the wafer, a gap is formed between the first mirror portion and the second mirror portion so as to form a plurality of Fabry-Perot interference filter portions. A wafer inspection method according to an embodiment includes a step of performing faulty/non-faulty determination of each of the plurality of Fabry-Perot interference filter portions, and a step of applying ink to at least part of a portion overlapping the gap when viewed in a facing direction on the second mirror layer of the Fabry-Perot interference filter portion determined as faulty.
    Type: Application
    Filed: November 9, 2018
    Publication date: October 1, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Yumi KURAMOTO, Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Toshimitsu KAWAI, Hiroki OYAMA
  • Publication number: 20200292386
    Abstract: A transportation method for transporting an object including a plurality of Fabry-Perot interference filters, the transportation method including a first step of accommodating the object in an accommodating container, wherein the Fabry-Perot interference filter includes a substrate, a first mirror portion and a second minor portion provided on the substrate to face each other via a gap and in which a distance from each other is variable, and in the first step, the object is accommodated and supported in the accommodating container in a state where the plurality of Fabry-Perot interference filters is two-dimensionally arranged.
    Type: Application
    Filed: November 9, 2018
    Publication date: September 17, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Hiroki OYAMA, Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Toshimitsu KAWAI, Yumi KURAMOTO
  • Patent number: 10775238
    Abstract: A spectral sensor includes a wiring substrate which has a principal surface; a light detector which is disposed on the principal surface of the wiring substrate and is electrically connected to the wiring substrate; spacer which is disposed around the light detector, on the principal surface of the wiring substrate; and a Fabry-Perot interference filter which has a light transmission region and is disposed on the principal surface of the wiring substrate with the spacer therebetween. The spacer support the Fabry-Perot interference filter in a surrounding region of the light transmission region and the spacer is arranged to form opening communicating with an inner side of the surrounding region and an outer side of the surrounding region, when viewed from a light transmission direction in the transmission region.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: September 15, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Katsumi Shibayama, Takashi Kasahara, Masaki Hirose, Toshimitsu Kawai
  • Publication number: 20200278272
    Abstract: An optical inspection device includes: a wafer support unit configured to support a wafer in which a plurality of Fabry-Perot interference filter portions are formed, each of the plurality of filter portions in which a distance between the first mirror portion and the second mirror portion facing each other varies by an electrostatic force, the wafer support unit configured to support the wafer such that a direction in which the first mirror portion and the second mirror portion face each other follows along a reference line; a light emission unit configured to emit light to be incident on each of the plurality of filter portions along the reference line; and a light detection unit configured to detect light transmitted through each of the plurality of filter portions along the reference line. The wafer support unit has a light passage region that allows light to pass along the reference line.
    Type: Application
    Filed: November 9, 2018
    Publication date: September 3, 2020
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi KASAHARA, Katsumi SHIBAYAMA, Masaki HIROSE, Toshimitsu KAWAI, Hiroki OYAMA, Yumi KURAMOTO
  • Patent number: 10751996
    Abstract: A piezoelectric device includes in a piezoelectric layer, a recessed portion which is provided outside an active portion and opens on the side opposite to a substrate is provided, in a lamination direction of the substrate and a piezoelectric element, a first barrier layer formed of a material other than the zirconium oxide is formed in a region of a vibration plate opposite to the substrate and overlapping a bottom surface of the recessed portion, and the first barrier layer is not formed in a portion of a region overlapping the active portion in the lamination direction.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 25, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Motoki Takabe, Masao Nakayama, Takanori Aimono, Takashi Kasahara