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公开(公告)号：US20240361664A1
公开(公告)日：2024-10-31
申请号：US18637686
申请日：2024-04-17
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Takashi INOUE
IPC: G02F1/35
CPC classification number: G02F1/353 , G02F1/3501 , G02F2203/12 , G02F2203/26 , G02F2203/54
Abstract: An optical pulse train generation device includes a storage unit and a characteristic setting unit. The storage unit stores a plurality of phase patterns in advance. The plurality of phase patterns are phase patterns for forming, from a first optical pulse, an optical pulse train including a plurality of second optical pulses having time differences therebetween and having different center wavelengths. Between the plurality of phase patterns, one or both of a first characteristic regarding the first optical pulse and a second characteristic regarding the optical pulse train are different. The characteristic setting unit sets the first characteristic and the second characteristic in response to the user's input. The storage unit stores the plurality of phase patterns in association with the first characteristic and the second characteristic. A spatial light modulator displays a phase pattern corresponding to the first characteristic and the second characteristic set by the characteristic setting unit.
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公开(公告)号：US20240110833A1
公开(公告)日：2024-04-04
申请号：US18530698
申请日：2023-12-06
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Hisanari TAKAHASHI , Kyohei SHIGEMATSU , Takashi INOUE
CPC classification number: G01J3/4412 , G01J3/0208 , G01J3/0229 , G01J3/2823
Abstract: A dispersion measurement apparatus includes a pulse forming unit, a correlation optical system, a beam splitter, an operation unit, an imaging unit, a spatial filter unit, and a photodetector. The pulse forming unit forms a light pulse train including light pulses having time differences and different center wavelengths. The beam splitter branches the light pulse train passed through a measurement object. The imaging unit disperses one light pulse train and images each light pulse. The spatial filter unit extracts light of a partial region of the other light pulse train. The correlation optical system outputs correlation light including a cross-correlation or an autocorrelation of the extracted light. The photodetector detects a temporal waveform of the correlation light. The operation unit estimates a wavelength dispersion amount in the measurement object based on a feature value of the temporal waveform.
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公开(公告)号：US20230304923A1
公开(公告)日：2023-09-28
申请号：US18120551
申请日：2023-03-13
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Hisanari TAKAHASHI , Koyo WATANABE , Hiroshi SATOZONO , Kyohei SHIGEMATSU , Takashi INOUE
CPC classification number: G01N21/31 , G02F1/31 , G02F2203/055
Abstract: An optical property measurement apparatus includes a pulse formation unit, a waveform measurement unit, and an optical system. The pulse formation unit is capable of changing a temporal waveform of pulsed light in accordance with a type of optical property to be measured. The waveform measurement unit measures a temporal waveform of the pulsed light output from a measurement object after being incident on the measurement object. The optical system has an attenuation unit with an attenuation rate with respect to one wavelength component constituting the pulsed light larger than an attenuation rate with respect to another wavelength component constituting the pulsed light. The optical system is capable of switching between a first state in which the attenuation unit is arranged on an optical path of the pulsed light output from the measurement object and a second state in which the attenuation unit is not arranged on the optical path.
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公开(公告)号：US20190128741A1
公开(公告)日：2019-05-02
申请号：US16088875
申请日：2017-03-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koji TAKAHASHI , Haruyasu ITO , Koyo WATANABE
CPC classification number: G01J11/00 , G01J3/0297 , G01J3/28 , G01J3/447 , G02F1/01 , G02F1/13 , G02F1/137
Abstract: In a waveform measurement method, first, initial pulsed light is spatially dispersed for respective wavelengths. Next, the initial pulsed light is input to a polarization dependent type SLM in a state where a polarization plane is inclined with respect to a modulation axis direction, and a phase spectrum of a first polarization component of the initial pulsed light along the modulation axis direction is modulated, to cause a time difference between first pulsed light Lp1 including the first polarization component and second pulsed light Lp2 including a second polarization component orthogonal to the first polarization component. After combining the wavelength components, an object is irradiated with the pulsed light Lp1 and the pulsed light Lp2, and light generated in the object is detected. The above detection operation is performed while changing the time difference, and a temporal waveform of the pulsed light Lp1 is obtained.
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公开(公告)号：US20190033284A1
公开(公告)日：2019-01-31
申请号：US16046530
申请日：2018-07-26
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Naoya MATSUMOTO , Koyo WATANABE , Hirotoshi TERADA
IPC: G01N33/483 , G01N21/41 , G03H1/00 , G01N21/64 , G02B27/00 , G03H1/08 , G02B5/32 , G01B11/24 , G03H1/22 , G02B21/00 , G01N21/63
CPC classification number: G01N33/4833 , G01B11/24 , G01N21/41 , G01N21/636 , G01N21/6458 , G01N21/6486 , G01N2021/6471 , G01N2201/0675 , G02B5/32 , G02B21/00 , G02B21/16 , G02B27/0068 , G03H1/0005 , G03H1/08 , G03H1/2294 , G03H2001/0072
Abstract: A photostimulation apparatus includes an objective lens arranged to face a biological object, a light source configured to output light to be radiated toward the biological object via the objective lens, a shape acquisition unit configured to acquire information about a shape with a refractive index difference in the biological object, a hologram generation unit configured to generate aberration correction hologram data for correcting aberrations due to the shape with the refractive index difference on the basis of the information acquired by the shape acquisition unit, and a spatial light modulator on which a hologram based on the aberration correction hologram data is presented and which modulates the light output from the light source.
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Patent Agency Ranking
公开(公告)号：US20240210275A1
公开(公告)日：2024-06-27
申请号：US18286857
申请日：2022-03-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Hisanari TAKAHASHI , Takashi INOUE
IPC: G01M11/02
CPC classification number: G01M11/0285
Abstract: A dispersion measurement device includes a pulse forming unit, an optical detection unit, and an arithmetic operation unit. The pulse forming unit includes an SLM that presents a phase pattern, and forms an optical pulse train from the first optical pulse, the optical pulse train including a plurality of second optical pulses having a time difference from each other and having center wavelengths different from each other. The optical detection unit detects a temporal waveform of the optical pulse train. An optical component is arranged on an optical path between the pulse forming unit and the optical detection unit. The arithmetic operation unit estimates a wavelength dispersion amount of the optical component based on a feature amount of the temporal waveform. The phase pattern gives a group delay dispersion having a sign opposite to the group delay dispersion of the optical component to the first optical pulse.
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公开(公告)号：US20240162679A1
公开(公告)日：2024-05-16
申请号：US18283894
申请日：2022-03-02
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Koyo WATANABE , Hiroki KAMEI
Abstract: A light-emitting device is an S-iPM laser of M-point oscillation including a phase modulation layer. Four-direction in-plane wavenumber vectors each including a wavenumber spread corresponding to an angular spread of light output from the light-emitting device are formed on a reciprocal lattice space of the phase modulation layer. The magnitude of at least one of the in-plane wavenumber vectors is smaller than 2π/λ. A predetermined phase distribution included in the phase modulation layer includes an element for focusing the light output.
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8.发明公开公开(公告)号：US20230384624A1
公开(公告)日：2023-11-30
申请号：US18229909
申请日：2023-08-03
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Takashi INOUE
CPC classification number: G02F1/0121 , G06F17/148 , G02F2201/305
Abstract: An iterative Fourier transform unit of a modulation pattern calculation apparatus performs a Fourier transform on a waveform function including an intensity spectrum function and a phase spectrum function, performs a replacement of a temporal intensity waveform function based on a desired waveform after the Fourier transform, and then performs an inverse Fourier transform. The iterative Fourier transform unit performs the replacement using a result of multiplying a function representing the desired waveform by a coefficient. The coefficient has a value with which a difference between the function after the multiplication of the coefficient and the temporal intensity waveform function after the Fourier transform is smaller than a difference before the multiplication, and a ratio of the difference is smaller when an intensity is higher at each time of the function before the multiplication.
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公开(公告)号：US20220107221A1
公开(公告)日：2022-04-07
申请号：US17488493
申请日：2021-09-29
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Hisanari TAKAHASHI , Kyohei SHIGEMATSU , Takashi INOUE
Abstract: A dispersion measurement apparatus includes a pulse forming unit, a correlation optical system, a beam splitter, an operation unit, an imaging unit, a spatial filter unit, and a photodetector. The pulse forming unit forms a light pulse train including light pulses having time differences and different center wavelengths. The beam splitter branches the light pulse train passed through a measurement object. The imaging unit disperses one light pulse train and images each light pulse. The spatial filter unit extracts light of a partial region of the other light pulse train. The correlation optical system outputs correlation light including a cross-correlation or an autocorrelation of the extracted light. The photodetector detects a temporal waveform of the correlation light. The operation unit estimates a wavelength dispersion amount in the measurement object based on a feature value of the temporal waveform.
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10.发明申请公开(公告)号：US20190258206A1
公开(公告)日：2019-08-22
申请号：US16276767
申请日：2019-02-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koji TAKAHASHI , Koyo WATANABE , Takashi INOUE
IPC: G03H1/22
Abstract: An intensity spectrum designing unit of a data generating device includes an initial value setting unit that sets a plurality of objects of a first generation of an intensity spectrum function A(ω) and a phase spectrum function Ψ(ω), an evaluation value calculating unit that calculates an evaluation value for each of a plurality of objects of an n-th generation, an object selecting unit that selects two or more objects used for generating a plurality of objects of an (n+1)-th generation among objects of the n-th generation on the basis of superiority of the evaluation value, and a next-generation generating unit that generates a plurality of objects of the (n+1)-th generation on the basis of the selected two or more objects. The evaluation value calculating unit, the object selecting unit, and the next-generation generating unit repeat processes while 1 is added to n until a predetermined condition is satisfied.
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