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: 20160357009
    Abstract: A Fabry-Perot interference filter includes a fixed mirror and a movable mirror disposed opposite to the fixed mirror via a gap, distance between the fixed mirror and the movable in a light transmission region being adjusted by electrostatic force. A plurality of first annular grooves surrounding the light transmission region and a plurality of first through-holes opening to the gap side and the opposite side are formed at a surrounding portion surrounding the light transmission region in the movable mirror.
    Type: Application
    Filed: February 3, 2015
    Publication date: December 8, 2016
    Inventors: Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Toshimitsu KAWAI
  • Patent number: 9477073
    Abstract: An immersion microscope objective includes, in order from an object side, a first lens group having a positive refractive power, a second lens group, and a third lens group, wherein the first lens group changes a light beam from an object to a convergent light beam, the second lens group has a refractive power smaller than that of the first lens group, and the following conditional expression (1-1) is satisfied: 7.5 mm<NA0×d0 (1-1) where NA0 denotes an object-side numerical aperture of the immersion microscope objective, and d0 denotes a working distance of the immersion microscope objective.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: October 25, 2016
    Assignee: OLYMPUS CORPORATION
    Inventor: Takashi Kasahara
  • Publication number: 20160282181
    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: Application
    Filed: October 31, 2014
    Publication date: September 29, 2016
    Inventors: Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Toshimitsu KAWAI
  • Publication number: 20160245697
    Abstract: A spectral sensor includes a Fabry-Perot interference filter which is provided with an opening to pass light transmitted according to a distance between a first mirror and a second mirror along a facing direction; a light detector which has a light reception unit to receive the light having passed through the opening; a wiring substrate on which the light detector is mounted; and a plurality of spacers which support the filter on the wiring substrate, such that a second space continuous with a first space in the opening and including the first space when viewed from the facing direction is formed between the filter and the wiring substrate. The light detector is disposed in the second space. The light reception unit is disposed in a region corresponding to the first space in the second space, when viewed from the facing direction.
    Type: Application
    Filed: October 31, 2014
    Publication date: August 25, 2016
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Toshimitsu KAWAI
  • Publication number: 20160245696
    Abstract: A spectral sensor 1A includes a Fabry-Perot interference filter 10 which has a light transmission region 11; a light detector 3 which detects light having transmitted the light transmission region 11; spacers 4A and 4B which support the Fabry-Perot interference filter 10 in a surrounding region of the light transmission region 11; and a die bond resin 5 which adheres the Fabry-Perot interference filter 10 and the spacers 4A and 4B to each other. The die bond resin 5 has one opening A2 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 11.
    Type: Application
    Filed: October 31, 2014
    Publication date: August 25, 2016
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Katsumi SHIBAYAMA, Takashi KASAHARA, Masaki HIROSE, Toshimitsu KAWAI
  • Patent number: 9323036
    Abstract: A microscope objective comprises in order from an object side, a first lens group, a second lens group, and a third lens group. The first lens group includes a first cemented lens, and at least one positive single lens, the second lens group includes a second cemented lens, and the third lens group includes a first lens component and a second lens component. A positive lens and a meniscus lens are cemented in the first cemented lens. A surface nearest to an image side of the first lens component is a concave surface, and a surface nearest to the object side of the second lens component is a concave surface. The first lens component and the second lens component are disposed such that the both concave surfaces are face-to-face, and the following conditional expression (1) is satisfied. 0.5<(n0/n1o)/NAob<0.
    Type: Grant
    Filed: March 17, 2013
    Date of Patent: April 26, 2016
    Assignee: OLYMPUS CORPORATION
    Inventor: Takashi Kasahara
  • Publication number: 20160109291
    Abstract: A method for making a surface enhanced Raman scattering device in accordance with one aspect of the present invention comprises a first step of forming a nanoimprint layer on a main surface of a wafer including a plurality of portions each corresponding to a substrate; a second step of transferring, by using a mold having a pattern corresponding to a fine structural part, the pattern to the nanoimprint layer after the first step, and thereby forming the formed layer including the fine structural part for each portion corresponding to the substrate; a third step of forming a conductor layer on the fine structural part after the second step; and a fourth step of cutting the wafer into each portion corresponding to the substrate after the second step.
    Type: Application
    Filed: December 16, 2015
    Publication date: April 21, 2016
    Inventors: Masashi ITO, Katsumi SHIBAYAMA, Takashi KASAHARA, Yoshihiro MARUYAMA
  • Patent number: 9273999
    Abstract: A spectroscopic sensor 1A comprises an interference filter unit 20A having a cavity layer 21 and first and second mirror layers 22, 23 and a light detection substrate 30 having a light-receiving surface 32a for receiving light transmitted through the interference filter unit 20A. The interference filter unit 20A has a first filter region 24 corresponding to the light-receiving surface 32a and a ring-shaped second filter region 25 surrounding the first filter region 24. The distance between the first and second mirror layers 22, 23 varies in the first filter region 24 and is fixed in the second filter region 25.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: March 1, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Takashi Kasahara, Katsumi Shibayama
  • Patent number: 9267894
    Abstract: A method for making a surface enhanced Raman scattering device in accordance with one aspect of the present invention comprises a first step of forming a nanoimprint layer on a main surface of a wafer including a plurality of portions each corresponding to a substrate; a second step of transferring, by using a mold having a pattern corresponding to a fine structural part, the pattern to the nanoimprint layer after the first step, and thereby forming the formed layer including the fine structural part for each portion corresponding to the substrate; a third step of forming a conductor layer on the fine structural part after the second step; and a fourth step of cutting the wafer into each portion corresponding to the substrate after the second step.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: February 23, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Masashi Ito, Katsumi Shibayama, Takashi Kasahara, Yoshihiro Maruyama
  • Patent number: 9195040
    Abstract: An immersion microscope objective includes a first lens group having a positive refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power. The first lens group includes a cemented lens of a positive lens and a meniscus lens, and at least one positive single lens, the second lens group changes a divergent light beam to a convergent light beam, and the third lens group includes an object-side lens group and an image-side lens group disposed concave surfaces are face-to-face sandwiching one air space. There is a plurality of lenses having a positive refractive power, and at least one lens having a positive refractive power out of the plurality of lenses having a positive refractive power has a cemented surface which is cemented to a lens having a negative refractive power.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: November 24, 2015
    Assignee: OLYMPUS CORPORATION
    Inventor: Takashi Kasahara
  • Patent number: 9143038
    Abstract: The power supply includes a transformer for generating a first output voltage by a first secondary winding, and a superimposing voltage by a second secondary winding, and a driver. Furthermore, the circuit includes first and second rectifying and smoothing circuits for respectively rectifying and smoothing the first output voltage and superimposing voltage, and an adder for adding the rectified and smoothed superimposing voltage on the rectified and smoothed first output voltage to output a second output voltage. The first and second output voltages are fed back respectively by DC coupling, the fed-back first and second output voltages are respectively adjusted by first and second feedback factors, and the adjusted feedback components are combined and amplified to be applied to the driver for PWM-control.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: September 22, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshiaki Takayanagi, Takashi Kasahara
  • Publication number: 20150219562
    Abstract: A SERS element comprises a substrate having a front face; a fine structure part formed on the front face and having a plurality of pillars; and a conductor layer formed on the fine structure part and constituting an optical function part for generating surface-enhanced Raman scattering. The conductor layer has a base part formed along the front face and a plurality of protrusions protruding from the base part at respective positions corresponding to the pillars. The base part has a thickness greater than the height of the pillars.
    Type: Application
    Filed: August 9, 2013
    Publication date: August 6, 2015
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Katsumi Shibayama, Masashi Ito, Takafumi Yokino, Masaki Hirose, Anna Yoshida, Kazuto Ofuji, Yoshihiro Maruyama, Takashi Kasahara, Toshimitsu Kawai, Toru Hirohata, Hiroki Kamei, Hiroki Oyama
  • Publication number: 20150212003
    Abstract: A SERS element comprises a substrate having a front face; a fine structure part formed on the front face and having a plurality of pillars; and a conductor layer formed on the fine structure part and constituting an optical function part for generating surface-enhanced Raman scattering. The conductor layer has a base part formed along the front face and a plurality of protrusions protruding from the base part at respective positions corresponding to the pillars. The base part is formed with a plurality of grooves surrounding the respective pillars when seen in the projecting direction of the pillars, while an end part of the protrusion is located within the groove corresponding thereto.
    Type: Application
    Filed: August 9, 2013
    Publication date: July 30, 2015
    Inventors: Katsumi Shibayama, Masashi Ito, Takafumi Yokino, Masaki Hirose, Anna Yoshida, Kazuto Ofuji, Yoshihiro Maruyama, Takashi Kasahara, Toshimitsu Kawai, Toru Hirohata, Hiroki Kamei, Hiroki Oyama
  • Publication number: 20150153224
    Abstract: A spectroscopic sensor 1A comprises an interference filter unit 20A, a light detection substrate 30A, and a separator 15. The interference filter unit 20A has a cavity layer 21 and first and second mirror layers 22, 23 opposing each other through the cavity layer 21 and selectively transmits therethrough a predetermined wavelength range of light according to its incident position from the first mirror layer 22 side to the second mirror layer 23 side. The light detection substrate 30A has a light-receiving surface 32a for receiving light transmitted through the interference filter unit 20A and detects the light incident on the light-receiving surface 32a. The separator 15 extends from the cavity layer 21 to at least one of the first and second mirror layers 22, 23 and optically separates the interference filter unit 20A as seen in a predetermined direction intersecting the light-receiving surface 32a .
    Type: Application
    Filed: May 8, 2013
    Publication date: June 4, 2015
    Inventors: Katsumi Shibayama, Takashi Kasahara
  • Publication number: 20150138560
    Abstract: A spectroscopic sensor 1A comprises an interference filter unit 20A having a cavity layer 21 and first and second mirror layers 22, 23 and a light detection substrate 30 having a light-receiving surface 32a for receiving light transmitted through the interference filter unit 20A. The interference filter unit 20A has a first filter region 24 corresponding to the light-receiving surface 32a and a ring-shaped second filter region 25 surrounding the first filter region 24. The light detection substrate 30 has a plurality of pad units 33a contained in the second filter region 25, while the second filter region 25 is formed with through holes 6 for exposing the pad units 33a to the outside.
    Type: Application
    Filed: May 8, 2013
    Publication date: May 21, 2015
    Inventors: Takashi Kasahara, Katsumi Shibayama
  • Publication number: 20150131101
    Abstract: A spectroscopic sensor 1A comprises an interference filter unit 20A having a cavity layer 21 and first and second mirror layers 22, 23 and a light detection substrate 30 having a light-receiving surface 32a for receiving light transmitted through the interference filter unit 20A. The interference filter unit 20A has a first filter region 24 corresponding to the light-receiving surface 32a and a ring-shaped second filter region 25 surrounding the first filter region 24. The distance between the first and second mirror layers 22, 23 varies in the first filter region 24 and is fixed in the second filter region 25.
    Type: Application
    Filed: May 8, 2013
    Publication date: May 14, 2015
    Inventors: Takashi Kasahara, Katsumi Shibayama
  • Patent number: 9024589
    Abstract: A charge/discharge control method for an alkaline storage battery (11) includes: obtaining in advance a coefficient (K) representing characteristics of a memory effect of the alkaline storage battery; causing the alkaline storage battery to perform a charge/discharge between a lower-limit depth-of-charge (SOCb), of which a depth-of-charge is set within a range of 10% to 30%, and an upper-limit depth-of-charge (S), of which a depth-of-charge is set within a range of 70% to 90%; calculating an additional charge electricity quantity (C) based on the coefficient (K), the upper-limit depth-of-charge (S), and a predetermined reference time (T); measuring a charging/discharging time during which the alkaline storage battery performs the charge/discharge; and performing a charge of the alkaline storage battery with the calculated additional charge electricity quantity added to the upper-limit depth-of-charge, each time when the measured charging/discharging time reaches the reference time.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: May 5, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takashi Kasahara, Kenta Tsutsui, Hideaki Ohyama
  • Publication number: 20150109682
    Abstract: An immersion microscope objective includes, in order from an object side, a first lens group having a positive refractive power, a second lens group, and a third lens group, wherein the first lens group changes a light beam from an object to a convergent light beam, the second lens group has a refractive power smaller than that of the first lens group, and the following conditional expression (1-1) is satisfied: 7.5 mm?NAo×d0??(1-1) where NAo denotes an object-side numerical aperture of the immersion microscope objective, and d0 denotes a working distance of the immersion microscope objective.
    Type: Application
    Filed: October 14, 2014
    Publication date: April 23, 2015
    Applicant: OLYMPUS CORPORATION
    Inventor: Takashi KASAHARA
  • Patent number: 8980675
    Abstract: A method for manufacturing a spectroscopic sensor 1 comprises a first step of forming a cavity layer 21 by etching a surface layer disposed on a handle substrate, a second step of forming a first mirror layer 22 on the cavity layer 21 after the first step, a third step of joining a light-transmitting substrate 3 onto the first mirror layer 22 after the second step, a fourth step of removing the handle substrate from the cavity layer 21 after the third step, a fifth step of forming a second mirror layer 23 on the cavity layer 21 devoid of the handle substrate after the fourth step, and a sixth step of joining a light-detecting substrate 4 onto the second mirror layer after the fifth step.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: March 17, 2015
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Katsumi Shibayama, Takashi Kasahara
  • Publication number: 20140362615
    Abstract: The power supply includes a transformer for generating a first output voltage by a first secondary winding, and a superimposing voltage by a second secondary winding, and a driver. Furthermore, the circuit includes first and second rectifying and smoothing circuits for respectively rectifying and smoothing the first output voltage and superimposing voltage, and an adder for adding the rectified and smoothed superimposing voltage on the rectified and smoothed first output voltage to output a second output voltage. The first and second output voltages are fed back respectively by DC coupling, the fed-back first and second output voltages are respectively adjusted by first and second feedback factors, and the adjusted feedback components are combined and amplified to be applied to the driver for PWM-control.
    Type: Application
    Filed: August 21, 2014
    Publication date: December 11, 2014
    Inventors: Yoshiaki Takayanagi, Takashi Kasahara