公开(公告)号：US10670520B2

公开(公告)日：2020-06-02

申请号：US16193069

申请日：2018-11-16

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoichi Kawada

IPC: G01N21/3581 ,  G01N21/21 ,  G01N21/35 ,  G01N21/23

Abstract: In an optical analysis device, a terahertz wave generation module includes a terahertz wave generation unit, and a polarization switching unit that periodically switches a polarization state of a terahertz wave between a first polarization state and a second polarization state that are different from each other on the basis of a frequency signal. An electric field vector measurement unit detects a first electric field vector of a terahertz wave in a first polarization state and a second electric field vector of the terahertz wave in a second polarization state by referring to a frequency signal. An optical parameter analysis unit determines an optical parameter of a measurement target from an intersection between first analysis data based on spectral data obtained by performing Fourier transformation on a product of the first electric field vector and a rotation matrix and second analysis data based on spectral data obtained by performing Fourier transformation on a product of the second electric field vector and the rotation matrix.

公开(公告)号：US10451651B2

公开(公告)日：2019-10-22

申请号：US16108447

申请日：2018-08-22

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoichi Kawada ,  Hironori Takahashi ,  Jun Takeda ,  Ikufumi Katayama ,  Yusuke Arashida ,  Katsumasa Yoshioka

IPC: G01Q60/16 ,  G01Q10/04

Abstract: A tunnel current control apparatus includes a light source, a branching unit, a chopper, an optical path difference adjustment unit, a polarizer, a terahertz wave generation element, a CEP adjustment unit, a terahertz wave detection element, a quarter-wave plate, a polarization separation element, photodetectors, a differential amplifier, a lock-in amplifier, a current measurement unit, a processing unit, mirrors, and off-axis parabolic mirrors. The CEP adjustment unit can arbitrarily adjust a CEP of a terahertz wave pulse. The processing unit obtains a conversion filter used for conversion from an electric field waveform of a far field of the terahertz wave pulse to an electric field waveform of a near field based on a tunnel current measured by the current measurement unit and a correlation detected by the terahertz wave detection element.

公开(公告)号：US10048129B2

公开(公告)日：2018-08-14

申请号：US15597329

申请日：2017-05-17

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoichi Kawada

IPC: G01J3/14 ,  G01J3/447 ,  G01N21/25

Abstract: A total reflection spectroscopic measurement device includes a terahertz wave generation unit, an internal total reflection prism, a detection unit configured to detect the terahertz wave, an electric field vector measurement unit configured to measure an electric field vector of the terahertz wave, and an analysis unit configured to acquire information about an optical constant of the object to be measured. Proportions of S polarization component and P polarization component of the terahertz wave are constant. The analysis unit acquires the information about the optical constant on the basis of a ratio between S polarization component and P polarization component of the measured electric field vector when the object is not arranged on the total reflection surface and a ratio between S polarization component and P polarization component of the measured electric field vector when the object is arranged on the total reflection surface.

公开(公告)号：US20150136986A1

公开(公告)日：2015-05-21

申请号：US14402570

申请日：2013-05-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kouichiro Akiyama ,  Takashi Yasuda ,  Yoichi Kawada ,  Atsushi Nakanishi

IPC: G01N21/3586

CPC classification number: G01N21/3586 ,  G01N21/3581

Abstract: A prism member having an entrance surface for arranging a terahertz-wave generator for generating a terahertz wave in response to pump light incident thereon, an arrangement part for arranging an object to be measured, an exit surface for arranging a terahertz-wave detector for detecting a correlation between the terahertz wave transmitted through the object in the arrangement part and probe light, a first optical surface for collimating or condensing the terahertz wave incident thereon from the entrance surface toward the arrangement part, and a second optical surface for condensing the terahertz wave transmitted through the arrangement part toward the exit surface, the arrangement part forms a depression adapted to be filled with a liquid incapable of dissolving the object therein.

Abstract translation: 一种具有入射表面的棱镜构件，用于响应于入射到其上的泵浦光而产生太赫兹波的太赫兹波发生器，用于布置待测物体的布置部分，用于布置用于检测的太赫兹波检测器的出射表面 在配置部分中透过物体的太赫兹波与探测光之间的相关性，用于使入射表面朝向配置部分入射的太赫波的准直或聚光的第一光学表面和用于冷凝太赫兹波的第二光学表面 通过排列部分朝向出射表面透射，所述布置部分形成适于填充有不能将物体溶解在其中的液体的凹陷。

公开(公告)号：US10248003B2

公开(公告)日：2019-04-02

申请号：US15505963

申请日：2015-08-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kouichiro Akiyama ,  Yoichi Kawada ,  Takashi Yasuda ,  Atsushi Nakanishi ,  Hironori Takahashi

IPC: G02F1/355 ,  G02F1/361 ,  C07D213/38 ,  C07D401/04 ,  G01N21/3581 ,  C07C309/30

Abstract: Disclosed is a non-linear optical crystal containing pyridinium represented by the following Formula (1), 4-substituted phenylsulfonate represented by the following Formula (2a), and 2,4,6-substituted phenylsulfonate represented by the following Formula (2b).

公开(公告)号：US09927298B2

公开(公告)日：2018-03-27

申请号：US15131390

申请日：2016-04-18

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoichi Kawada ,  Yoshiyuki Shimizu ,  Toyohiko Yamauchi

IPC: G01J3/02 ,  G01J3/42 ,  G01N21/35 ,  G01J3/12

CPC classification number: G01J3/0229 ,  G01J3/42 ,  G01J2003/1213 ,  G01N2021/3595

Abstract: A spectroscopic measurement apparatus includes a light source, a diffraction grating being a spectroscopic unit, a spatial filter unit, a detection unit, and an analysis unit. The diffraction grating spatially disperses light from the light source, and outputs the light to different optical paths according to a wavelength. The spatial filter unit inputs the light from the diffraction grating to different positions according to the wavelength, applies loss depending on the wavelength to the light, and outputs the light. The detection unit detects the intensity of the light from the spatial filter unit. The analysis unit obtains the intensities of light in an absorption band and light in a non-absorption band of a component in a measurement sample on an optical path between the light source and the detection unit based on the detection result, and evaluates the component in the measurement sample.

公开(公告)号：US09612153B2

公开(公告)日：2017-04-04

申请号：US14950617

申请日：2015-11-24

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoichi Kawada ,  Takashi Yasuda ,  Hironori Takahashi

IPC: G01J5/02 ,  G01J1/44 ,  G01J4/04 ,  G01J1/42 ,  G01J1/04 ,  G01J3/433 ,  G01J3/42 ,  G01J3/02 ,  G01R15/24 ,  G01R29/08 ,  G01N21/3581

CPC classification number: G01J1/44 ,  G01J1/0429 ,  G01J1/4228 ,  G01J3/0224 ,  G01J3/0262 ,  G01J3/42 ,  G01J3/433 ,  G01J3/4338 ,  G01J4/04 ,  G01J2001/4242 ,  G01N21/3581 ,  G01R15/241 ,  G01R29/0871

Abstract: In this electric field vector detection method, an electro-optic crystal, where a (111) surface of an optical isotropic medium is cut out, is used as a terahertz wave detection element. The method includes: causing polarization of probe light of ultrashort pulsed light to be circular polarization; allowing the probe light having circular polarization to enter the terahertz wave detection element and probing the terahertz wave; modulating the probe light, having probed the terahertz wave, by a rotating analyzer and detecting the modulated probe light by a photodetector; performing lock-in detection of a detection signal from the photodetector by a lock-in detector using a frequency based on a rotational frequency of the rotating analyzer as a reference signal; and detecting an electric field vector of the terahertz wave based on a detection signal from the lock-in detector.

公开(公告)号：US09417182B2

公开(公告)日：2016-08-16

申请号：US14402570

申请日：2013-05-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kouichiro Akiyama ,  Takashi Yasuda ,  Yoichi Kawada ,  Atsushi Nakanishi

IPC: G01N21/35 ,  G01N21/3586 ,  G01N21/3581

CPC classification number: G01N21/3586 ,  G01N21/3581

Abstract: A prism member having an entrance surface for arranging a terahertz-wave generator for generating a terahertz wave in response to pump light incident thereon, an arrangement part for arranging an object to be measured, an exit surface for arranging a terahertz-wave detector for detecting a correlation between the terahertz wave transmitted through the object in the arrangement part and probe light, a first optical surface for collimating or condensing the terahertz wave incident thereon from the entrance surface toward the arrangement part, and a second optical surface for condensing the terahertz wave transmitted through the arrangement part toward the exit surface, the arrangement part forms a depression adapted to be filled with a liquid incapable of dissolving the object therein.

Abstract translation: 一种具有入射表面的棱镜构件，用于响应于入射到其上的泵浦光而产生太赫兹波的太赫兹波发生器，用于布置待测物体的布置部分，用于布置用于检测的太赫兹波检测器的出射表面 在配置部分中透过物体的太赫兹波与探测光之间的相关性，用于使入射表面朝向配置部分入射的太赫波的准直或聚光的第一光学表面和用于冷凝太赫兹波的第二光学表面 通过排列部分朝向出射表面透射，所述布置部分形成适于填充有不能将物体溶解在其中的液体的凹陷。

公开(公告)号：US09157851B2

公开(公告)日：2015-10-13

申请号：US13742616

申请日：2013-01-16

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Gen Takebe ,  Yoichi Kawada ,  Kouichiro Akiyama

IPC: G01J5/02 ,  G01N21/3577 ,  G01N21/3563 ,  G01N21/3586

CPC classification number: G01N21/3577 ,  G01N21/3563 ,  G01N21/3586 ,  G01N21/552

Abstract: The drug evaluation device obtains, by an attenuated reflection method using a terahertz wave, an evaluation absorption spectrum for a frequency with respect to a liquid to be evaluated. When crystalline particles are suspended in a liquid, an absorption peak having a peak area corresponding to the amount of suspension appears in its absorption spectrum. Therefore, whether or not and by what ratio crystalline particles are suspended in the liquid can be determined according to whether or not the absorption peak exists and the peak area. When amorphous particles are suspended in the liquid, the baseline of its absorption spectrum lowers according to the ratio of amorphous particles suspended in the liquid. Therefore, whether or not and by what ratio amorphous particles are suspended in the liquid can be determined according to the lowering amount of the baseline.

Abstract translation: 药物评价装置通过使用太赫兹波的衰减反射法获得关于待评价液体的频率的评价吸收光谱。 当结晶颗粒悬浮在液体中时，具有对应于悬浮液量的峰面积的吸收峰出现在其吸收光谱中。 因此，可以根据是否存在吸收峰和峰面积来确定晶体颗粒悬浮在液体中的比例和比例。 当无定形颗粒悬浮在液体中时，其吸收光谱的基线根据悬浮在液体中的无定形颗粒的比例而降低。 因此，可以根据基线的降低量来确定无定形颗粒是否悬浮在液体中的比例。

公开(公告)号：US11320569B2

公开(公告)日：2022-05-03

申请号：US16581885

申请日：2019-09-25

Applicant: HAMAMATSU PHOTONICS K.K. ,  Teijin Limited

Inventor： Yoichi Kawada ,  Hironori Takahashi ,  Yoshinori Ikeda ,  Junshi Soeda

IPC: G02B1/111

Abstract: An optical element for terahertz waves includes: an optical component including a silicon surface, an antireflection film including an organic resin including a cycloolefin-based polymer as a main component, and inorganic particles dispersed in the organic resin; and an adhesive layer located between the optical component and the antireflection film in a thickness direction of the antireflection film and bonding the silicon surface of the optical component and the antireflection film to each other. The adhesive layer includes a thermally denatured olefin-based polymer.