Patents by Inventor Shinpei Todo

Shinpei Todo 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: 8124258
    Abstract: There is provided a glass substrate for a magnetic disk in which a maximum height of bumps forming a roughness pattern at a period of smaller than 2 ?m is 6 nm or lower in an annular area having a width of 30 ?m on a main surface on which a magnetic recording area is formed, a number of bumps having a height of 3 nm or higher in a unit area having a circular arc length of 30 ?m within the annular area is one or less, and a difference in arithmetic average roughness between unit areas within the annular area is 0.2 nm or smaller.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: February 28, 2012
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Shinpei Todo, Yasuhiro Naka
  • Patent number: 7695200
    Abstract: A connecting member which is formed by filling a mold with a resin composition and then solidifying the resin composition, the connecting member having one end face in which a plurality of fine holes of a ? or less are arrayed in a row with a pitch P therebetween, and guide pin insertion holes are formed on either side of the fine holes, wherein the resin composition is comprised of a resin and a filler mixed therein, and wherein the space (P?a) between the fine holes meets the following formula; Dm<(P?a)<Dmax, in which Dmax represents the largest diameter of the filler particles, and Dm represents the most frequent diameter of the filler particles.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: April 13, 2010
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yasuhiro Naka, Shinpei Todo, Takashi Shigematu, Takayuki Ando, Yoshimi Ono
  • Publication number: 20090324995
    Abstract: There is provided a glass substrate for a magnetic disk in which a maximum height of bumps forming a roughness pattern at a period of smaller than 2 ?m is 6 nm or lower in an annular area having a width of 30 ?m on a main surface on which a magnetic recording area is formed, a number of bumps having a height of 3 nm or higher in a unit area having a circular arc length of 30 ?m within the annular area is one or less, and a difference in arithmetic average roughness between unit areas within the annular area is 0.2 nm or smaller.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 31, 2009
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Shinpei Todo, Yasuhiro Naka
  • Publication number: 20090169156
    Abstract: A connecting member which is formed by filling a mold with a resin composition and then solidifying the resin composition, the connecting member having one end face in which a plurality of fine holes of a? or less are arrayed in a row with a pitch P therebetween, and guide pin insertion holes are formed on either side of the fine holes, wherein the resin composition is comprised of a resin and a filler mixed therein, and wherein the space (P?a) between the fine holes meets the following formula; Dm<(P?a)<Dmax, in which Dmax represents the largest diameter of the filler particles, and Dm represents the most frequent diameter of the filler particles.
    Type: Application
    Filed: March 3, 2009
    Publication date: July 2, 2009
    Inventors: Yasuhiro Naka, Shinpei Todo, Takashi Shigematu, Takayuki Ando, Yoshimi Ono
  • Patent number: 7527434
    Abstract: A connecting member which is formed by filling a mold with a resin composition and then solidifying the resin composition, the connecting member having one end face in which a plurality of fine holes of a ? or less are arrayed in a row with a pitch P therebetween, and guide pin insertion holes are formed on either side of the fine holes, wherein the resin composition is comprised of a resin and a filler mixed therein, and wherein the space (P?a) between the fine holes meets the following formula; Dm<(P?a)<Dmax, in which Dmax represents the largest diameter of the filler particles, and Dm represents the most frequent diameter of the filler particles.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: May 5, 2009
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yasuhiro Naka, Shinpei Todo, Takashi Shigematu, Takayuki Ando, Yoshimi Ono
  • Publication number: 20080056644
    Abstract: A connecting member which is formed by filling a mold with a resin composition and then solidifying the resin composition, the connecting member having one end face in which a plurality of fine holes of a ? or less are arrayed in a row with a pitch P therebetween, and guide pin insertion holes are formed on either side of the fine holes, wherein the resin composition is comprised of a resin and a filler mixed therein, and wherein the space (P?a) between the fine holes meets the following formula; Dm<(P?a)<Dmax, in which Dmax represents the largest diameter of the filler particles, and Dm represents the most frequent diameter of the filler particles.
    Type: Application
    Filed: September 26, 2005
    Publication date: March 6, 2008
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yasuhiro Naka, Shinpei Todo, Takashi Shigemaiu, Takayuki Ando, Yoshimi Ono
  • Patent number: 6644069
    Abstract: An end heating and processing method of an optical fiber preform. In this method, an optical fiber preform is processed by heating and melting an end of a vitrified optical fiber preform including a core portion and a cladding portion formed on an outer circumference thereof to process the end having a shape for drawing as an optical fiber.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: November 11, 2003
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yukio Kohmura, Masahide Kuwabara, Kiyoshi Arima, Yasuhiro Naka, Shinpei Todo
  • Patent number: 6639658
    Abstract: In a defect detecting method for detecting defect of a measured optical fiber, the defect of the optical fiber is detected on the basis of a pattern of the intensity distribution obtained by illuminating a laser beam on to the optical fiber, the pattern of the intensity distribution is subjected to a weak smoothing process and a strong smoothing process to form first and second pattern, respectively, and a judging pattern is formed on the basis of a difference or quotient between the first and second pattern, and then is subjected to Fourier transform to form a Fourier transform pattern which is evaluated by using double logarithmic axis, and judging curve having high contributing rate to the Fourier transform pattern is applied to the Fourier transform pattern, and the defect of the optical fiber is detected on the basis of magnitude of the dispersion of the Fourier transform pattern from the judging curve.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: October 28, 2003
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Shinpei Todo, Yasuhiro Naka, Akira Aikawa
  • Patent number: 6600554
    Abstract: In defect detecting method for detecting defect of an optical fiber to be measured, in which a laser beam is illuminated onto an optical fiber to be measured from a direction transverse to an optical axis of the fiber to check intensity distribution of forward scattering light permeated through within the optical fiber and scattered, and the defect of the optical fiber to be measured is detected on the basis of a pattern of the intensity distribution, the pattern of the intensity distribution is subjected to a smoothing process having weak smoothness and a smoothing process having strong smoothness to form first and second patterns, respectively, and a judging pattern is formed on the basis of a difference or the quotient between the first and second patterns, and the defect of the optical fiber to be measured is detected by evaluating magnitude of the judging pattern.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: July 29, 2003
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Shinpei Todo, Yasuhiro Naka, Akira Aikawa
  • Publication number: 20030126890
    Abstract: A method for fiber drawing of an optical fiber, which method comprises:
    Type: Application
    Filed: October 11, 2002
    Publication date: July 10, 2003
    Applicant: The Furukawa Electric Co., Ltd.
    Inventors: Nobuaki Orita, Shinpei Todo, Yasuhiro Naka
  • Publication number: 20020196427
    Abstract: In defect detecting method for detecting defect of an optical fiber to be measured, in which a laser beam is illuminated onto an optical fiber to be measured from a direction transverse to an optical axis of the fiber to check intensity distribution of forward scattering light permeated through within the optical fiber and scattered, and the defect of the optical fiber to be measured is detected on the basis of a pattern of the intensity distribution, the pattern of the intensity distribution is subjected to a smoothing process having weak smoothness and a smoothing process having strong smoothness to form first and second patterns, respectively, and a judging pattern is formed on the basis of a difference or the quotient between the first and second patterns, and the defect of the optical fiber to be measured is detected by evaluating magnitude of the judging pattern.
    Type: Application
    Filed: August 14, 2002
    Publication date: December 26, 2002
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Shinpei Todo, Yasuhiro Naka, Akira Aikawa
  • Publication number: 20020054285
    Abstract: In defect detecting method for detecting defect of an optical fiber to be measured, in which a laser beam is illuminated onto an optical fiber to be measured from a direction transverse to an optical axis of the fiber to check intensity distribution of forward scattering light permeated through within the optical fiber and scattered, and the defect of the optical fiber to be measured is detected on the basis of a pattern of the intensity distribution, the pattern of the intensity distribution is subjected to a smoothing process having weak smoothness and a smoothing process having strong smoothness to form first and second patterns, respectively, and a judging pattern is formed on the basis of a difference or the quotient between the first and second patterns, and the defect of the optical fiber to be measured is detected by evaluating magnitude of the judging pattern.
    Type: Application
    Filed: August 15, 2001
    Publication date: May 9, 2002
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Shinpei Todo, Yasuhiro Naka, Akira Aikawa
  • Publication number: 20010023598
    Abstract: An end heating and processing method of an optical fiber preform. In this method, an optical fiber preform is processed by heating and melting an end of a vitrified optical fiber preform including a core portion and a cladding portion formed on an outer circumference thereof to process the end having a shape for drawing as an optical fiber.
    Type: Application
    Filed: February 14, 2001
    Publication date: September 27, 2001
    Applicant: The Furukawa Electric Co., Ltd.
    Inventors: Yukio Kohmura, Masahide Kuwabara, Kiyoshi Arima, Yasuhiro Naka, Shinpei Todo