-
公开(公告)号：US20190053768A1
公开(公告)日：2019-02-21
申请号：US16103968
申请日：2018-08-16
Applicant: SEIKO EPSON CORPORATION
Inventor： Megumi ENARI , Ayae SAWADO , Kohei YAMADA , Akiko YAMADA , Akira IKEDA , Masayasu FUKUOKA , Akira KITAHARA
Abstract: A biological analysis device includes: a pulse pressure calculation unit that calculates a pulse pressure index related to a pulse pressure of a biological body; an average blood pressure calculation unit that calculates an average blood pressure index related to an average blood pressure of the biological body; and a blood pressure calculation unit that calculates a systolic blood pressure and a diastolic blood pressure in accordance with the pulse pressure index and the average blood pressure index. At least one of the pulse pressure index and the average blood pressure index is calculated in accordance with a blood flow index which is calculated from an intensity spectrum related to a frequency of light reflected and received from an inside of the biological body through radiation of a laser beam and is related to a blood flow of the biological body.
-
公开(公告)号：US20190053767A1
公开(公告)日：2019-02-21
申请号：US15998545
申请日：2018-08-16
Applicant: SEIKO EPSON CORPORATION
Inventor： Kohei YAMADA , Ayae SAWADO , Akiko YAMADA , Megumi ENARI , Yuta MACHIDA , Akira IKEDA , Masayasu FUKUOKA , Akira KITAHARA
Abstract: A biological analysis device includes an average blood pressure calculation unit that calculates an average blood pressure index related to an average blood pressure of a biological body in accordance with a blood vessel diameter index related to a blood vessel diameter of the biological body and a blood flow index related to a blood flow of the biological body and calculated from an intensity spectrum related to a frequency of light reflected and received from an inside of the biological body through radiation of a laser beam.
-
公开(公告)号：US20180014758A1
公开(公告)日：2018-01-18
申请号：US15632824
申请日：2017-06-26
Applicant: SEIKO EPSON CORPORATION
Inventor： Kohei YAMADA , Megumi ENARI , Akiko YAMADA
IPC: A61B5/1455
CPC classification number: A61B5/1455 , A61B5/02108 , A61B5/0261 , A61B5/681 , A61B5/6831 , A61B5/7203 , A61B5/7257
Abstract: A detection device that includes a light emitting part that outputs coherent light, a first light receiving part that generates the first detection signal according to a light reception level of the coherent light output from the light emitting part and passing through an artery of the measurement site, and a second light receiving part that generates the second detection signal according to the light reception level of the coherent light output from the light emitting part and passing through the artery, wherein the light emitting part, the first light receiving part, and the second light receiving part are provided on a detection surface facing the measurement site and located on a straight line, and are located at an equal distance from the light emitting part on opposite sides to each other with the light emitting part in between.
-
公开(公告)号：US20250102362A1
公开(公告)日：2025-03-27
申请号：US18894090
申请日：2024-09-24
Applicant: SEIKO EPSON CORPORATION
Inventor： Nobuhito HAYASHI , Kohei YAMADA
Abstract: An interferometer including an analysis optical system including a retroreflector configured to reflect analysis light and a first light receiver configured to receive the analysis light and output a first light reception signal, the analysis optical system irradiating a sample with the analysis light and causing the analysis light to interfere; a length measuring optical system including a laser light source configured to output laser light, an optical modulator configured to modulate a frequency of the laser light by using a vibrator and add a modulation component to the laser light, and a second light receiver configured to receive the laser light containing the modulation component and a length measurement component generated when the retroreflector is irradiated with the laser light and output a second light reception signal, the length measuring optical system causing the laser light to interfere; and a driver configured to change a position of the retroreflector.
-
公开(公告)号：US20240319087A1
公开(公告)日：2024-09-26
申请号：US18612104
申请日：2024-03-21
Applicant: SEIKO EPSON CORPORATION
Inventor： Nobuhito HAYASHI , Kohei YAMADA
IPC: G01N21/3504 , G01N21/35 , G01N21/3586 , G01N21/359
CPC classification number: G01N21/3504 , G01N21/3586 , G01N21/359 , G01N2021/3595 , G01N2201/0636 , G01N2201/12769
Abstract: A spectroscopic device includes: an analysis optical system; a length measurement optical system; and a calculation device. The analysis optical system includes a moving mirror and a first light receiving element. The length measurement optical system includes a second light source configured to emit laser light, a gas cell with a gas that absorbs light of a predetermined wavelength sealed therein and configured to cause the laser light to be incident thereon, an emitted light amount detection unit configured to detect an amount of light emitted from the gas cell and output an emitted light amount detection signal, a light source control unit configured to control a wavelength of the laser light based on the emitted light amount detection signal, and a length measurement unit configured to use the laser light to obtain a displacement signal corresponding to a position of the moving mirror, and the calculation device includes a moving mirror position calculation unit, a light intensity calculation unit, and a Fourier transform unit configured to generate a spectral pattern.
-
Patent Agency Ranking
公开(公告)号：US20240045199A1
公开(公告)日：2024-02-08
申请号：US18365294
申请日：2023-08-04
Applicant: SEIKO EPSON CORPORATION
Inventor： Kohei YAMADA
CPC classification number: G02B26/0833 , G01J3/4535 , G02B27/1026 , G01J3/0229
Abstract: An optical device includes: a second light source configured to emit laser light having a wavelength different from that of measurement light emitted from a first light source; a light splitter; a first mirror configured to add a first modulation signal to the measurement light and add a displacement signal to the laser light; a second mirror configured to reflect a second beam of the measurement light; a first color separator configured to separate the second beam of the measurement light from a second laser light beam based on a difference in wavelength; an optical modulator driven based on a drive signal and configured to add a second modulation signal to the second laser light beam after the separation; a first photodetector configured to receive the measurement light including a sample-derived signal and the first modulation signal; and a second photodetector configured to receive the laser light including the displacement signal and the second modulation signal.
-
公开(公告)号：US20230243636A1
公开(公告)日：2023-08-03
申请号：US18160381
申请日：2023-01-27
Applicant: SEIKO EPSON CORPORATION
Inventor： Kohei YAMADA
IPC: G01B9/02001 , G01B9/02
CPC classification number: G01B9/02007 , G01B9/02049
Abstract: A laser interferometer includes: a laser light source configured to emit first laser light; an optical modulator including a vibration element that generates a vibration component in a direction intersecting an incident surface of the first laser light, and configured to modulate the first laser light by using the vibration element to generate second laser light including a modulation signal; a photodetector configured to receive the second laser light and third laser light that includes a sample signal generated by the first laser light being reflected by an object, and output a light reception signal; a demodulation circuit configured to demodulate the sample signal from the light reception signal based on a reference signal; and an oscillation circuit configured to operate using the vibration element as a signal source and output the reference signal to the demodulation circuit.
-
公开(公告)号：US20230130013A1
公开(公告)日：2023-04-27
申请号：US18089724
申请日：2022-12-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Kohei YAMADA
IPC: G01S17/58 , G01S7/4861 , G01S7/499 , G01S7/484
Abstract: A frequency shift light modulator includes a resonator and a diffraction grating including a plurality of grooves arranged in parallel in a displacement direction of the resonator, and the diffraction grating is provided on the resonator. By providing the diffraction grating on the resonator, it is easy to realize miniaturization and increase in accuracy of the frequency shift light modulator. Further, it is easy to realize application to a high frequency region in a MHz band, that is, high frequency modulation. It is possible to efficiently obtain an effect based on a combination of the resonator and the diffraction grating.
-
公开(公告)号：US20220390755A1
公开(公告)日：2022-12-08
申请号：US17804091
申请日：2022-05-25
Applicant: SEIKO EPSON CORPORATION
Inventor： Kohei YAMADA , Takeshi SHIMIZU
Abstract: A laser interferometer that includes a light source configured to emit laser light, an optical divider configured to divide the laser light into a first optical path and a second optical path, an optical modulator being provided on the first optical path or the second optical path, including an oscillator that oscillates when a current is applied, and being configured to modulate the laser light by using the oscillator, a photoreceptor configured to receive the laser light and output a photoreception signal, the laser light being reflected by an object to be measured that is provided on the first optical path or the second optical path, and a demodulation circuit configured to demodulate, from the photoreception signal, a Doppler signal derived from the object to be measured, based on a reference signal and a modulation signal derived from the optical modulator, wherein Iq/f≤1×10−7 is satisfied, where an amplitude value of the current applied to the oscillator that is oscillating is Iq [A] and an oscillation frequency of the oscillator is f [Hz].
-
公开(公告)号：US20200309953A1
公开(公告)日：2020-10-01
申请号：US16830569
申请日：2020-03-26
Applicant: Seiko Epson Corporation
Inventor： Kohei YAMADA
IPC: G01S17/58 , G01S7/484 , G01S7/499 , G01S7/4861
Abstract: A frequency shift light modulator includes a resonator and a diffraction grating including a plurality of grooves arranged in parallel in a displacement direction of the resonator, and the diffraction grating is provided on the resonator. By providing the diffraction grating on the resonator, it is easy to realize miniaturization and increase in accuracy of the frequency shift light modulator. Further, it is easy to realize application to a high frequency region in a MHz band, that is, high frequency modulation. It is possible to efficiently obtain an effect based on a combination of the resonator and the diffraction grating.
-
-
-
-
-
-
-
-
-
Search Results
42
records
(took 0.02 seconds)
