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    CAPACITIVE LOAD DRIVING CIRCUIT
    11.
    发明公开
    CAPACITIVE LOAD DRIVING CIRCUIT 审中-公开
    驱动电路容性负载

    公开(公告)号：EP2775619A4

    公开(公告)日：2015-06-24

    申请号：EP12845714

    申请日：2012-08-23

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： YAMAGISHI SHOGO ,  FUJIMOTO MASATOSHI ,  TAKAHASHI AKIRA

    IPC: H03K4/02 ,  G02F1/03 ,  H03K17/691

    CPC classification number: H02M7/537 ,  G02F1/0327 ,  H01S3/0057 ,  H01S3/0064 ,  H01S3/08 ,  H01S3/1075 ,  H01S3/235 ,  H03K4/023 ,  H03K17/102 ,  H03K17/691 ,  H03K2017/6875 ,  H03K2217/009 ,  Y10T307/549

    Abstract: A driving circuit 1A is a circuit selectively outputting one of a staircase wave and a square wave from an output terminal 11, to drive a capacitive load 52, and includes a high-voltage power source 41 supplying a constant voltage VH, an FET 21 connected in series between the output terminal 11 and the high-voltage power source 41, a transformer 22 in which an output side coil is connected to a gate of the FET 21, an input terminal 12a connected to an input side coil of the transformer 22 via a capacitive element 23, a high-voltage power source 42 supplying a constant voltage VL lower than the constant voltage VH, an FET 31 connected in series between the output terminal 11 and the high-voltage power source 42, a transformer 32 in which an output side coil is connected to a gate of the FET 31, and an input terminal 12b connected to an input side coil of the transformer 32 via a capacitive element 33. Thereby, the circuit is realized which is capable of suitably providing a stair-shaped high-voltage pulse to the capacitive load.

    INSTRUMENT FOR MEASURING LIFETIME OF FLUORESCENCE
    13.
    发明公开
    INSTRUMENT FOR MEASURING LIFETIME OF FLUORESCENCE 审中-公开
    仪的测量荧光寿命

    公开(公告)号：EP1324020A4

    公开(公告)日：2005-06-15

    申请号：EP00953505

    申请日：2000-08-18

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： FUJIMOTO MASATOSHI ,  AOSHIMA SHINICHIRO ,  HOSODA MAKOTO ,  TSUCHIYA YUTAKA

    IPC: G01N21/64

    CPC classification number: G01N21/6408 ,  G01N21/6445

    Abstract: Light from a pulse light source (11) is split by an optical splitter (12) into two light beams. One of the light beams enters a detection medium (6) through a gate optical system (2) as a gate pulse used for observing fluorescence; and the other enters a substance (4) to be measured through an exciting optical system (3) as an exciting pulse used for generating fluorescence to irradiate the detection medium (6) with fluorescence emitted from the substance (4) through a fluorescent optical system (5). An instrument for measuring the lifetime of fluorescence can measure the variation with time of fluorescence, especially the lifetime of fluorescence efficiently with high time resolution by observing the fluorescent component passing through a region where variation of refractive index is induced by the nonlinear optical effect produced in the detection medium (6) by the gate pulse as a fluorescent image utilizing variation in the polarized state and observing the positional variation of the fluorescent image in correlation with the variation with time of fluorescence.

    APPARATUS FOR PRODUCING RADIOISOTOPE
    14.
    发明公开
    APPARATUS FOR PRODUCING RADIOISOTOPE 审中-公开
    VORRICHTUNG ZUR RADIOSOTOPENERZEUGUNG

    公开(公告)号：EP1215684A4

    公开(公告)日：2004-03-10

    申请号：EP00953506

    申请日：2000-08-18

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： FUJIMOTO MASATOSHI ,  AOSHIMA SHINICHIRO ,  HOSODA MAKOTO ,  TSUCHIYA YUTAKA

    IPC: G21G1/02 ,  G21G1/12 ,  G21G4/08

    CPC classification number: G21G1/12 ,  G21G1/02

    Abstract: A radioisotope generating apparatus according to the present invention comprises a nuclear reaction section (30) an interior of which is retained in a vacuum; a source supply section (20) for supplying a source material R consisting of a nuclide necessary for generation of the radioisotope, to the nuclear reaction section; an optical system (10) for emitting pulse laser light toward the source material R supplied into the nuclear reaction section (30) and thereby brought into a dispersed state, thereby inducing a nuclear reaction in the source material R to generate the radioisotope; a product nucleus collecting section (40) for collecting a molecule PI having a nucleus of the radioisotope generated in the nuclear reaction section; and a radiation shielding system (50) for preventing outside leakage of radiations generated in the nuclear reaction section(30). This permits the position of a reaction field of the nuclear reaction to be fixed in a specific small region inside the nuclear reaction section, whereby the space necessary for the nuclear reaction section can be largely decreased.

    Abstract translation: 一种用于生产放射性同位素的装置，包括保持在真空中的核反应堆（30） 原料供给装置（20），其向核反应堆供给由生成放射性同位素所需的核素构成的原料（R） 一个光学系统（10），用于向分散在核反应堆（30）中的原料（R）发射激光脉冲，从而在原料（R）中发生核反应以产生放射性同位素; 收集器（40），用于收集在核反应堆中产生的含有放射性同位素核的分子P1; 和用于防止来自核反应堆（30）的辐射泄漏的辐射屏蔽系统（50）。 核反应发生在一个特定的非常小的区域，因此需要核反应堆的空间更窄。

    LIGHT TRACK OBSERVING DEVICE
    16.
    发明公开
    LIGHT TRACK OBSERVING DEVICE 审中-公开
    轻轨监测装置

    公开(公告)号：EP1312912A4

    公开(公告)日：2005-09-21

    申请号：EP00948255

    申请日：2000-07-27

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： AOSHIMA SHINICHIRO ,  FUJIMOTO MASATOSHI ,  HOSODA MAKOTO ,  TSUCHIYA YUTAKA

    IPC: G01B9/02 ,  G01J11/00 ,  G01N21/21 ,  G01B11/00

    CPC classification number: G01J11/00

    Abstract: A light pulse from an ultra-short pulse light source (11) is split by an light splitter (12) and directed, respectively, as an exciting pulse and a probe pulse to a detection medium (4) through an exciting optical system (2) and a probe optical system (3). A light track region where variation of refractive index takes place through nonlinear optical effect and which is generated in the detection medium (4) upon impingement of the exciting pulse is irradiated with the probe pulse. Among the components transmitted through the detection medium (4), the probe pulse component transmitted through the light track region and having a varied polarized state is detected at a photodetecting section (5) by means of a camera (53) through an analyzer (51). A light track observing device for observing the light track of an exciting pulse directly is realized.

    OBSERVATION DEVICE
    17.
    发明公开
    OBSERVATION DEVICE 审中-公开

    公开(公告)号：EP2565702A4

    公开(公告)日：2017-12-13

    申请号：EP11775162

    申请日：2011-05-02

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： IWAI HIDENAO ,  FUJIMOTO MASATOSHI

    IPC: G02B27/52 ,  G01J9/02 ,  G01N21/45 ,  G03H1/04 ,  G03H1/08

    CPC classification number: G01B9/02045 ,  G01N21/41 ,  G02B21/14 ,  G02B27/52 ,  G03H1/0443 ,  G03H1/0866 ,  G03H2001/0447 ,  G03H2001/045 ,  G03H2001/0463 ,  G03H2210/62

    Abstract: Provided is an observation device which can obtain a phase image of a moving object rapidly with high sensitivity even when using a photodetector having a slow read-out speed per pixel. The observation device 1 comprises a light source 10, a first modulator 20, a second modulator 30, a lens 40, a beam splitter 41, a photodetector 46, and an arithmetic unit 50. The lens 40 receives scattered light generated by a moving object 2 and forms a Fourier transform image of the object 2. The photodetector 46 outputs data representing a sum in a v direction of data temporally changing at a frequency corresponding to a Doppler shift frequency of the light having reached each position on a light-receiving surface through the lens 40 at each position in a u direction at each time. The arithmetic unit 50 obtains an image of the object 2 according to the output of the photodetector 46.

    PULSE-WIDTH CONVERTING APPARATUS AND OPTICAL AMPLIFYING SYSTEM
    18.
    发明公开
    PULSE-WIDTH CONVERTING APPARATUS AND OPTICAL AMPLIFYING SYSTEM 审中-公开

    公开(公告)号：EP2475055A4

    公开(公告)日：2017-12-13

    申请号：EP10813568

    申请日：2010-07-08

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： FUJIMOTO MASATOSHI ,  KAWADA YOICHI ,  FUKAZAWA KODAI

    IPC: G02B17/02 ,  G02B5/18 ,  G02B27/10 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/11 ,  H01S3/16 ,  H01S3/23

    CPC classification number: H01S3/0057 ,  G02B17/023 ,  G02B27/1093 ,  G02F2201/17 ,  G02F2201/305 ,  G02F2203/26 ,  H01S3/067 ,  H01S3/094053 ,  H01S3/1112 ,  H01S3/1618 ,  H01S3/2308

    Abstract: An input light pulse Pi, input at a constant incident angle to a transmission-type diffraction grating 20, is dispersed according to the wavelengths to be output at output angles according to the wavelengths, to be reflected by reflecting mirrors 41, 42, and 43 in series, and thereafter, the light rays are input at incident angles according to their wavelengths to the transmission-type diffraction grating 20, to be output at a constant output angle from the transmission-type diffraction grating 20. The optical path for the light rays of respective wavelength components, output at the constant output angle from the transmission-type diffraction grating 20, is folded back by a rectangular prism 40, to be input at a constant incident angle to the transmission-type diffraction grating 20, and the light rays are output at output angles according to their wavelengths, to be reflected by the reflecting mirrors 43, 42, and 41 in series, and are thereafter input at incident angles according to their wavelengths to the transmission-type diffraction grating 20. The light rays, input at the incident angles according to their wavelengths to the transmission-type diffraction grating 20, are coupled by the transmission-type diffraction grating 20, to be output as an output light pulse Po. Thereby, realizing the pulse width conversion device and the optical amplifier system, which are easily downsized.

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