Patents by Inventor Masahiro Toida

Masahiro Toida 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: 10809200
    Abstract: Provided is a test object visualizing device, including: light irradiating unit configured to make wavelength of at least any one of pump light and Stokes light generated on the same optical path variable per test position of test object, and irradiate test object with pump light and Stokes light; molecule distribution image generating unit configured to detect anti-Stokes light emitted from test object according to wavelength difference between pump light and Stokes light, and generate a molecule distribution image based on anti-Stokes light; tomographic image generating unit configured to detect at least any one of reflected light from test object when irradiated with pump light and reflected light from test object when irradiated with Stokes light, and generate a tomographic image of test object based on the reflected light detected; and image display unit configured to display at least any one of molecule distribution image and tomographic image generated.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: October 20, 2020
    Assignee: SAITAMA MEDICAL UNIVERSITY
    Inventor: Masahiro Toida
  • Publication number: 20190137402
    Abstract: Provided is a test object visualizing device, including: light irradiating unit configured to make wavelength of at least any one of pump light and Stokes light generated on the same optical path variable per test position of test object, and irradiate test object with pump light and Stokes light; molecule distribution image generating unit configured to detect anti-Stokes light emitted from test object according to wavelength difference between pump light and Stokes light, and generate a molecule distribution image based on anti-Stokes light; tomographic image generating unit configured to detect at least any one of reflected light from test object when irradiated with pump light and reflected light from test object when irradiated with Stokes light, and generate a tomographic image of test object based on the reflected light detected; and image display unit configured to display at least any one of molecule distribution image and tomographic image generated.
    Type: Application
    Filed: June 16, 2017
    Publication date: May 9, 2019
    Applicant: Saitama Medical University
    Inventor: Masahiro TOIDA
  • Patent number: 9521953
    Abstract: A measurement device includes: a light source that generates a pump beam and a Stokes beam; a pulse stretch section that stretches the pulse of the pump beam so that the pulse width of the Stokes beam is shorter than the pulse width of the pump beam; an optical splitter that splits the Stokes beam into two beams; an optical scan section that scans a subject with the pulse-stretched pump beam and one of the two beams split by the optical splitter; a first optical detector that detects an anti-Stokes beam from the subject; a second optical detector that detects an interference beam of the other of the two beams and the Stokes beam reflected by the subject; and a signal processing section that performs an image generation process based on a detection signal from the first optical detector and a detection signal from the second optical detector.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 20, 2016
    Assignee: Saitama Medical University
    Inventor: Masahiro Toida
  • Publication number: 20150005641
    Abstract: A measurement device includes: a light source that generates a pump beam and a Stokes beam; a pulse stretch section that stretches the pulse of the pump beam so that the pulse width of the Stokes beam is shorter than the pulse width of the pump beam; an optical splitter that splits the Stokes beam into two beams; an optical scan section that scans a subject with the pulse-stretched pump beam and one of the two beams split by the optical splitter; a first optical detector that detects an anti-Stokes beam from the subject; a second optical detector that detects an interference beam of the other of the two beams and the Stokes beam reflected by the subject; and a signal processing section that performs an image generation process based on a detection signal from the first optical detector and a detection signal from the second optical detector.
    Type: Application
    Filed: February 26, 2013
    Publication date: January 1, 2015
    Inventor: Masahiro Toida
  • Patent number: 7924428
    Abstract: An optical rotary adapter is featured by including: a fixed side optical fiber which is fixedly supported by a fixed sleeve and which has an end surface inclined with respect to a plane perpendicular to the optical axis of the optical fiber; a fixed side collimator lens which is arranged to be separated from the inclined end surface of the fixed side optical fiber by a predetermined interval; a rotation side optical fiber which is fixedly supported substantially at the center of a rotatably supported rotary cylinder, which is arranged to face the fixed side collimator lens, and which has an end surface inclined with respect to a plane perpendicular to the optical axis of the fixed side collimator lens; a rotation side collimator lens which is fixedly supported by the rotary cylinder, and which is arranged between the fixed side collimator lens and the rotation side optical fiber so as to be separated from the inclined end surface of the rotation side optical fiber by a predetermined interval; a second luminou
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: April 12, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Masahiro Toida
  • Patent number: 7880892
    Abstract: In an optical tomographic imaging apparatus, a wavelength of a light beam emitted from the light source is selected by a light source section filter, and the light beam emitted from the light source is split into a measurement light beam and a reference light beam. The measurement light beam is reflected from a measurement subject when the measurement light beam is irradiated, is amplified. A specific wavelength from the amplified reflected light beam is selected by an amplifying section filtering mechanism having a filter characteristic identical to a time variation characteristic of the light source section filter, and then the reflected light beam is multiplexed with the reference light beam. A tomographic image of the measurement subject is acquired from detection result of an interference light beam between the reflected light beam and the reference light beam which have been multiplexed.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: February 1, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Masahiro Toida
  • Publication number: 20100004544
    Abstract: To enable OCT imaging inside a blood vessel without having to block blood flow, through the use of an optical tomographic imaging probe including: a tubular probe outer casing; an optical fiber disposed inside the probe outer casing in an axial direction of the probe outer casing; a plurality of transparent inflatable/deflatable split balloons provided circumferentially across an outer circumferential surface of a transparent portion of the probe outer casing, through which a light beam is to be emitted from the optical fiber towards an measurement object, so as to equally divide the circumferential direction; and a balloon inflating/deflating device that respectively and individually inflates/deflates each split balloon, images are captured by removing only blood from imaging areas without having to block blood flow, and a tomographic image of the entire circumference of the inner wall of the blood vessel is obtained by compositing the images.
    Type: Application
    Filed: July 1, 2009
    Publication date: January 7, 2010
    Inventor: Masahiro TOIDA
  • Publication number: 20090323080
    Abstract: In an optical tomographic imaging apparatus, a wavelength of a light beam emitted from the light source is selected by a light source section filter, and the light beam emitted from the light source is split into a measurement light beam and a reference light beam. The measurement light beam is reflected from a measurement subject when the measurement light beam is irradiated, is amplified. A specific wavelength from the amplified reflected light beam is selected by an amplifying section filtering mechanism having a filter characteristic identical to a time variation characteristic of the light source section filter, and then the reflected light beam is multiplexed with the reference light beam. A tomographic image of the measurement subject is acquired from detection result of an interference light beam between the reflected light beam and the reference light beam which have been multiplexed.
    Type: Application
    Filed: June 29, 2009
    Publication date: December 31, 2009
    Inventor: Masahiro TOIDA
  • Publication number: 20090244545
    Abstract: An optical rotary adapter is featured by including: a fixed side optical fiber which is fixedly supported by a fixed sleeve and which has an end surface inclined with respect to a plane perpendicular to the optical axis of the optical fiber; a fixed side collimator lens which is arranged to be separated from the inclined end surface of the fixed side optical fiber by a predetermined interval; a rotation side optical fiber which is fixedly supported substantially at the center of a rotatably supported rotary cylinder, which is arranged to face the fixed side collimator lens, and which has an end surface inclined with respect to a plane perpendicular to the optical axis of the fixed side collimator lens; a rotation side collimator lens which is fixedly supported by the rotary cylinder, and which is arranged between the fixed side collimator lens and the rotation side optical fiber so as to be separated from the inclined end surface of the rotation side optical fiber by a predetermined interval; a second luminou
    Type: Application
    Filed: March 25, 2009
    Publication date: October 1, 2009
    Applicant: FUJIFILM CORPORATION
    Inventor: Masahiro TOIDA
  • Publication number: 20090198125
    Abstract: An OCT optical probe to be inserted into a subject includes: a cylindrical sheath to be inserted into a subject; an optical fiber disposed in the internal space of the sheath; a rotatably-supporting portion fixed to the optical fiber in the vicinity of a distal end of the optical fiber; a distal optical system to deflect light emitted from the distal end of the optical fiber toward the subject; a holding portion to hold the distal optical system such that the optical system is rotatably supported by the rotatably-supporting portion; and a flexible shaft covering the optical fiber in the internal space, wherein the holding portion is fixed to a distal end of the flexible shaft. Using the OCT optical probe of the invention, the problem of degradation of measurement accuracy due to optical insertion loss and optical reflection loss at a rotary joint can be eliminated inexpensively and safely.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 6, 2009
    Applicants: FUJIFILM CORPORATION, FUJINON CORPORATION
    Inventors: Koki NAKABAYASHI, Masahiro TOIDA, Kiichi KATO, Yutaka KOROGI, Tadashi MASUDA
  • Patent number: 7557931
    Abstract: Low coherence light is divided into measuring light and reference light. The measuring light is collected to be projected onto an object of measurement. Intensities of the reflected light in a plurality of positions in the direction of depth are detected by carrying out a Fourier analysis on each channeled spectrum obtained by decomposing the detected interference light into frequency components. The optical path length of the reference light is stepwise changed to adjust the optical path length within the focusing range of the measuring light. A plurality of pieces of data representing the intensity of the reflected light are obtained in a plurality of positions in the direction of depth each time the position of the focusing range changes, and data on the position in the direction of depth where the measuring light is in the focusing range is extracted out of the pieces of data.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: July 7, 2009
    Assignee: FUJIFILM Corporation
    Inventor: Masahiro Toida
  • Patent number: 7542145
    Abstract: Light emitted from a light source is divided into measuring light and reference light. The reflected light from the object and the reference light are superposed. Interference light of the reflected light and reference light which have been superposed is detected. Intensities of the reflected light in a plurality of positions in the direction of depth of the object are detected on the basis of the frequency and the intensity, and a tomographic image of the object is obtained on the basis of the intensity of the reflected light in each position in the direction of depth. A compensating signal is obtained by removing the spectral components of the measuring light from an interference signal obtained by detection of the interference light, and the compensating signal is provided for detection of the intensities of the reflected light after a Gaussian transform.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: June 2, 2009
    Assignee: FUJIFILM Corporation
    Inventors: Masahiro Toida, Karin Kawahara
  • Publication number: 20090021746
    Abstract: In a tomograpy apparatus: low-coherence laser light is split into measurement light and reference light; the frequency of the reference light is slightly shifted from the frequency of reflected light generated by reflection of the measurement light by a sample; the reference light is optically combined with the reflected light; interference light generated by interference of the reference light with the reflected light when the reference light is combined with the reflected light is detected: fluorescence emitted by excitation of a fluorescent dye or a fluorescent pigment in the sample when the sample is irradiated with the measurement light is detected: a first tomographic image of the sample is formed by the detected interference light, and a second tomographic image of the sample is formed by the detected fluorescence.
    Type: Application
    Filed: January 13, 2006
    Publication date: January 22, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Masahiro Toida, Junji Nishigaki
  • Patent number: 7450242
    Abstract: Low coherence light having a central wavelength ?c of 1.1 ?m and a full width at half maximum spectrum ?? of 90 nm is emitted. The low coherence light has wavelength properties suited for the light absorbing properties, the diffusion properties, and the dispersion properties of living tissue. A light dividing means divides the low coherence light into a measuring light beam, which is irradiated onto a measurement target via an optical probe, and a reference light beam that propagates toward an optical path length adjusting means. A multiplexing means multiplexes a reflected light beam, which is the measuring light beam reflected at a predetermined depth of the measurement target, and the reference light beam, to form coherent light. A coherent light detecting means detects the optical intensity of the multiplexed coherent light. An image obtaining means performs image processes, and displays an optical tomographic image on a display apparatus.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: November 11, 2008
    Assignees: Fujifilm Corporation, Fujinon Corporation
    Inventors: Masahiro Toida, Yoshikatsu Morishima, Kazuhiro Tsujita, Hiroshi Fujita
  • Publication number: 20080171143
    Abstract: A process for preparation of an optical compensatory sheet is disclosed. The process comprises the steps in order of: coating a support with a photosensitive compound; exposing the photosensitive compound to beams of linearly polarized light emitted from a semiconductor laser to form an orientation layer; coating the orientation layer with a liquid crystal composition containing polymerizable liquid crystal molecules; aligning the liquid crystal molecules to form an optically anisotropic layer; and then polymerizing the liquid crystal molecules to fix alignment.
    Type: Application
    Filed: December 13, 2005
    Publication date: July 17, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Naoyuki Nishikawa, Masahiro Toida, Shin-ichi Morishima
  • Patent number: 7365285
    Abstract: A laser annealing system and apparatus, which includes a laser light source, which emits a laser beam through an a-Si layer on a substrate, an optical unit which forms an optical path along which the laser beam is transmitted through a subject to be annealed, and a first reflecting component, which reflects the laser beam that has been transmitted through the subject so that a direction of the laser beam is reversed along the optical path along which the laser beam is transmitted through the subject, to irradiate the subject. Since an operation in which energy is absorbed is repeated plural times when the laser beam is transmitted through the a-Si layer, input energy of the laser beam can be utilized without waste.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: April 29, 2008
    Assignee: FUJIFILM Corporation
    Inventor: Masahiro Toida
  • Publication number: 20070159637
    Abstract: In an optical tomography system, interference light is detected and a controller switches between a measurement initiating position adjusting mode and a tomographic image obtaining mode. The interference light is detected by an interference light detecting system including a spectral system which spectrally divides the interference light, a first optical system formed of a plurality of photo-sensors which detects the interference light by the wavelength band and a second optical system detecting a part interference light at a wavelength band which is a part of the whole wavelength band of the spectrally divided interference light in the measurement initiating position adjusting mode. The controller controls the interference light detecting system to detect the interference light with the first optical system in the image obtaining mode and with the second optical system in the measurement initiating position adjusting mode.
    Type: Application
    Filed: October 2, 2006
    Publication date: July 12, 2007
    Inventor: Masahiro Toida
  • Publication number: 20070086011
    Abstract: Low coherence light is divided into measuring light and reference light. The measuring light is collected to be projected onto an object of measurement. Intensities of the reflected light in a plurality of positions in the direction of depth are detected by carrying out a Fourier analysis on each channeled spectrum obtained by decomposing the detected interference light into frequency components. The optical path length of the reference light is stepwise changed to adjust the optical path length within the focusing range of the measuring light. A plurality of pieces of data representing the intensity of the reflected light are obtained in a plurality of positions in the direction of depth each time the position of the focusing range changes, and data on the position in the direction of depth where the measuring light is in the focusing range is extracted out of the pieces of data.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 19, 2007
    Inventor: Masahiro Toida
  • Publication number: 20070076215
    Abstract: In an optical coherence tomography measurement, interference light of the reflected light of the measuring light from the object and the reference light is detected. A controller switches between a measurement initiating position adjusting mode and a tomographic image obtaining mode. A light source which emits light having a predetermined wavelength band is provided and the wavelength emitted from the light source is selected. The controller controls so that a laser beam is emitted while the wavelength is swept at a predetermined period and the tomographic image signal is obtained on the basis of the interference light by the laser beam in the image obtaining mode, while controls so that light of a predetermined wavelength is emitted and the tomographic image signal is obtained on the basis of the interference light by the light of a predetermined wavelength in the measurement initiating position adjusting mode.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 5, 2007
    Inventor: Masahiro Toida
  • Publication number: 20070076219
    Abstract: In an optical coherence tomography measurement, a controller switches between a measurement initiating position adjusting mode in which the position in the direction of depth of the object in which a tomographic image signal is to be obtained is adjusted and a tomographic image obtaining mode in which a tomographic image of the object is to be obtained. In the image obtaining mode, the tomographic image is obtained from the interference light by the first low coherence light and in the measurement initiating position adjusting mode, the tomographic image is obtained from the interference light by the second low coherence light.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 5, 2007
    Inventor: Masahiro Toida