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公开(公告)号：US20240106185A1
公开(公告)日：2024-03-28
申请号：US18266026
申请日：2021-10-05
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koji TAKAHASHI
IPC: H01S3/1118 , H01S3/102
CPC classification number: H01S3/1118 , H01S3/1024
Abstract: An optical pulse generation device includes an optical resonator of mode-locked type, a light source, and a waveform controller. The optical resonator includes an optical amplification medium and generates, amplifies, and outputs laser light. The light source is optically coupled to the optical resonator and supplies excitation light to the optical amplification medium. The waveform controller is arranged in the optical resonator, and controls a time waveform of the laser light within a predetermined period to convert the laser light into an optical pulse train including two or more optical pulses within a period of the optical resonator. The optical resonator amplifies the optical pulse train after the predetermined period and outputs the optical pulse train having amplified as the laser light.
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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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3.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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公开(公告)号：US20240142375A1
公开(公告)日：2024-05-02
申请号：US18279080
申请日：2021-12-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kyohei SHIGEMATSU , Koji TAKAHASHI , Takashi INOUE
CPC classification number: G01N21/6408 , G01N21/255 , G01N21/6458 , G01N2021/1757 , G01N2021/1789 , G01N2021/6423 , G01N21/648 , G01N2201/0696
Abstract: A sample observation device includes a light source unit configured to output a pulse train in which multiple optical pulses with different center wavelengths are arranged at predetermined time intervals as excitation light; a measurement unit configured to perform time-resolved measurement on an optical response that is transmitted from the sample and corresponds to irradiation with the optical pulses included in the pulse train while scanning the sample with the excitation light, and to acquire measurement data with respect to the optical pulses; and a processing unit configured to perform linear unmixing processing on the measurement data with respect to the optical pulses on the basis of an excitation spectrum for every target included in the sample.
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公开(公告)号：US20200301174A1
公开(公告)日：2020-09-24
申请号：US16089400
申请日：2017-03-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Koji TAKAHASHI , Takashi INOUE , Haruyasu ITO
Abstract: An imaging system includes a light source for outputting initial pulsed light, a polarization control unit for rotating a polarization plane of the initial pulsed light, an optical pulse shaping unit for inputting the initial pulsed light with the rotated polarization plane, and outputting first pulsed light Lp1 having a first polarization direction and second pulsed light Lp2 having a second polarization direction different from the first polarization direction with a time, an irradiation optical system for irradiating an imaging object with the pulsed light Lp1 and the pulsed light Lp2, a light separation element for separating the pulsed light Lp1 and the pulsed light Lp2 reflected by or transmitted through the imaging object on the basis of the polarization directions, an imaging unit for imaging the pulsed light Lp1, and an imaging unit for imaging the pulsed light Lp2.
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Patent Agency Ranking
公开(公告)号：US20190143447A1
公开(公告)日：2019-05-16
申请号：US16088487
申请日：2017-03-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Haruyasu ITO , Koji TAKAHASHI , Koyo WATANABE
IPC: B23K26/064 , G02B21/06 , B23K26/067 , G02F1/37 , G02F1/1335
Abstract: A pulsed light generation apparatus includes a dispersing unit for dispersing pulsed light for respective wavelengths, a polarization dependent type spatial light modulator for modulating the dispersed pulsed light in respective wavelengths, and a combining unit for combining wavelength components of the pulsed light output from the spatial light modulator. A polarization plane of the pulsed light input to the spatial light modulator is inclined with respect to a polarization direction in which the spatial light modulator has a modulation function. The spatial light modulator causes a time difference between a first polarization component of the pulsed light along the polarization direction and a second polarization component of the pulsed light intersecting with the first polarization component.
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公开(公告)号：US20170030776A1
公开(公告)日：2017-02-02
申请号：US15303900
申请日：2015-04-08
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Takashi INOUE , Koyo WATANABE , Koji TAKAHASHI , Naoya MATSUMOTO
CPC classification number: G01J11/00 , G01J9/00 , G02B5/32 , G02F2203/56
Abstract: A waveform measurement device includes an input spectrum acquisition unit for acquiring an input intensity spectrum being an intensity spectrum of pulsed light, an optical element inputting the pulsed light and outputting light having an intensity spectrum corresponding to a phase spectrum of the pulsed light, an output spectrum acquisition unit for acquiring an output intensity spectrum being an intensity spectrum of the light output from the optical element, and a phase spectrum determination unit for determining the phase spectrum of the pulsed light by comparing an output intensity spectrum calculated when the pulsed light having an input intensity spectrum and a virtual phase spectrum is assumed to be input to the optical element with the output intensity spectrum acquired in the output spectrum acquisition unit. The phase spectrum determination unit sets the virtual phase spectrum by deforming the control phase spectrum.
Abstract translation: 波形测量装置包括：输入频谱获取单元，用于获取作为脉冲光的强度谱的输入强度谱;输入脉冲光的光学元件，并输出具有与脉冲光的相位谱对应的强度光谱的光;输出 光谱获取单元，用于获取作为从光学元件输出的光的强度谱的输出强度谱;以及相位谱确定单元，用于通过比较当脉冲光具有 假设输入强度谱和虚拟相位谱被输入到具有在输出频谱获取单元中获取的输出强度谱的光学元件。 相位谱确定单元通过使控制相位频谱变形来设定虚拟相位频谱。
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公开(公告)号：US20240094087A1
公开(公告)日：2024-03-21
申请号：US17768507
申请日：2020-11-19
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koji TAKAHASHI , Ryu NIIGAKI
IPC: G01M11/00
CPC classification number: G01M11/33
Abstract: In a measurement method, light inputs with the same center wavelength and different properties are performed on a light transmission medium, and a measured value of an intensity spectrum of each of light outputs is acquired. An error between the measured value and an estimated value of the intensity spectrum calculated based on a theoretical relation between an intensity spectrum and a phase spectrum of each of the light inputs, a nonlinear coefficient and a wavelength dispersion value of the light transmission medium, and the intensity spectrum of each of the light outputs is calculated while changing the nonlinear coefficient and the wavelength dispersion value. Further, the nonlinear coefficient and the wavelength dispersion value are determined based on a difference, in a relation between the nonlinear coefficient and the wavelength dispersion value and the error, between the light inputs.
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公开(公告)号：US20230324550A1
公开(公告)日：2023-10-12
申请号：US18104326
申请日：2023-02-01
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tomonori NAKAMURA , Kenichiro IKEMURA , Koji TAKAHASHI , Yasunori IGASAKI
CPC classification number: G01S17/32 , G01S7/4808 , G01S7/4811
Abstract: A device includes a signal generation unit that generates a first signal having a first repetition frequency and a second signal having a second repetition frequency higher than the first repetition frequency, a light source unit that generates light whose wavelength is modulated with time through internal modulation based on the first signal, a modulation unit that further modulates, with time, the wavelength of the light using a Doppler effect through external modulation based on the second signal, a splitting unit that divides the light output from the modulation unit into measurement light and reference light, an irradiation unit that irradiates a target object with the measurement light, a detection unit that detects interference light between reflected light from the target object and the reference light, and a calculation unit that calculates a distance to the target object on the basis of an output signal from the detection unit.
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10.发明申请公开(公告)号：US20190204626A1
公开(公告)日：2019-07-04
申请号：US16327891
申请日：2017-07-28
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koyo WATANABE , Koji TAKAHASHI , Takashi INOUE
CPC classification number: G02F1/01 , G02F2/004 , G02F2201/305
Abstract: A Fourier transform is performed on a first waveform function in a frequency domain, and a second waveform function in a time domain including a temporal intensity waveform function and a temporal phase waveform function is generated. A replacement of the temporal intensity waveform function based on a desired waveform is performed for the second waveform function. The second waveform function is modified so as to bring a spectrogram of the second waveform function close to a target spectrogram generated in advance in accordance with a desired wavelength band. An inverse Fourier transform is performed on the modified second waveform function, and a third waveform function in the frequency domain is generated. Data is generated on the basis of an intensity spectrum function or a phase spectrum function of the third waveform function.
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