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    LASER DEVICE AND PHOTOACOUSTIC MEASUREMENT DEVICE
    4.
    发明申请
    LASER DEVICE AND PHOTOACOUSTIC MEASUREMENT DEVICE 审中-公开
    激光器件和光电测量装置

    公开(公告)号：US20140336482A1

    公开(公告)日：2014-11-13

    申请号：US14337761

    申请日：2014-07-22

    Applicant: FUJIFILM Corporation

    Inventor： Tadashi KASAMATSU ,  Kazuhiro HIROTA

    IPC: H01S3/117 ,  A61B5/145 ,  A61B5/00

    CPC classification number: H01S3/117 ,  A61B5/0095 ,  A61B5/14546 ,  A61B5/14551 ,  G01N29/2418 ,  H01S3/061 ,  H01S3/08027 ,  H01S3/092 ,  H01S3/106 ,  H01S3/11 ,  H01S3/1623

    Abstract: Disclosed is a laser device which can emit light having first and second wavelengths, having the advantage of increasing laser efficiency without causing an increase in cost. A flash lamp irradiates excitation light onto a laser rod. An optical resonator includes a pair of mirrors facing each other with the laser rod interposed therebetween. A wavelength switching unit includes a long path filter which transmits light having a wavelength equal to or greater than a first wavelength. The wavelength switching unit inserts the long path filter on the optical path of the optical resonator when the wavelength of laser light to be emitted is the first wavelength.

    Abstract translation: 公开了一种可以发射具有第一和第二波长的光的激光装置，具有提高激光效率而不引起成本增加的优点。 闪光灯将激发光照射到激光棒上。 光学谐振器包括彼此面对的一对反射镜，激光棒插入其间。 波长切换单元包括透射波长等于或大于第一波长的光的长路径滤波器。 当待发射的激光的波长为第一波长时，波长切换单元将长路径滤波器插入光学谐振器的光路上。

    Laser source unit, control method thereof, photoacoustic image generation apparatus and photoacoustic image generation method
    5.
    发明申请
    Laser source unit, control method thereof, photoacoustic image generation apparatus and photoacoustic image generation method 有权
    激光源单元，其控制方法，光声图像生成装置和光声图像生成方法

    公开(公告)号：US20140148680A1

    公开(公告)日：2014-05-29

    申请号：US14167739

    申请日：2014-01-29

    Applicant: FUJIFILM Corporation

    Inventor： Tadashi KASAMATSU ,  Kaku IRISAWA ,  Kazuhiro HIROTA

    IPC: A61B5/00 ,  H01S3/11

    CPC classification number: A61B5/0095 ,  A61B5/0075 ,  A61B5/14542 ,  A61B5/14551 ,  A61B5/7257 ,  G01N21/1702 ,  G01N29/2418 ,  G01N2291/02466 ,  H01S3/061 ,  H01S3/08 ,  H01S3/092 ,  H01S3/1062 ,  H01S3/11

    Abstract: A pulse laser beam is emitted in a desired wavelength sequence using a laser light source unit. A Q switch and a birefringent filter are inserted into an optical resonator including a pair of mirrors and facing each other with a laser rod interposed therebetween. The birefringent filter changes an oscillation wavelength of the optical resonator in association with rotational displacement. The rotation control unit rotates the birefringent filter at a predetermined rotation speed depending on the number of wavelengths included in the wavelength sequence of the pulse laser beam to be emitted. An emission control unit irradiates the laser rod with excitation light, and then turns on the Q switch at a timing when a rotational-displacement-position of the birefringent filter is set to a position corresponding to the wavelength of the pulse laser beam to be emitted, to cause the pulse laser beam to be emitted.

    Abstract translation: 使用激光光源单元以期望的波长顺序发射脉冲激光束。 将Q开关和双折射滤光器插入到包括一对反射镜的光学谐振器中并且彼此相对并且其间插入激光棒。 双折射滤波器与旋转位移相关联地改变光谐振器的振荡波长。 旋转控制单元根据要发射的脉冲激光束的波长序列中包括的波长的数量以预定转速旋转双折射滤光器。 发射控制单元用激发光照射激光棒，然后在将双折射滤光器的旋转位移位置设置为与要发射的脉冲激光束的波长相对应的位置的时刻接通Q开关 以使脉冲激光束发射。

    PHOTOACOUSTIC MEASUREMENT DEVICE AND LASER LIGHT SOURCE
    7.
    发明申请
    PHOTOACOUSTIC MEASUREMENT DEVICE AND LASER LIGHT SOURCE 有权
    光电测量设备和激光光源

    公开(公告)号：US20150325971A1

    公开(公告)日：2015-11-12

    申请号：US14801533

    申请日：2015-07-16

    Applicant: FUJIFILM CORPORATION

    Inventor： Kazuhiro HIROTA ,  Tadashi KASAMATSU

    IPC: H01S3/00 ,  G01N29/44 ,  A61B5/00 ,  H01S3/115 ,  G02B26/04 ,  H01S3/092 ,  G01N29/24 ,  G01N29/06

    CPC classification number: A61B5/0095 ,  G01N29/0654 ,  G01N29/2418 ,  G01N29/44 ,  G01N2291/0289 ,  G01N2291/10 ,  G02B26/04 ,  H01S3/005 ,  H01S3/061 ,  H01S3/092 ,  H01S3/115

    Abstract: A flash lamp 32 excites a laser rod 31. A Q switch 35 which changes the loss of the optical resonator according to the voltage applied is inserted on the optical path of a pair of mirrors 33 and 34 forming the optical resonator. An optical path shutter 39 is provided on the optical path of laser emission light. In a first operation mode in which laser emission is performed, the optical path shutter 39 is opened and the voltage applied to the Q switch 35 is changed from a high voltage to, for example, 0 V to emit pulsed laser light after the flash lamp 32 excites the laser rod 31. In a second operation mode in which the laser emission is interrupted and waited for, the optical path shutter 39 is closed and the voltage applied to the Q switch 35 is, for example, 0 V.

    Abstract translation: 闪光灯32激励激光棒31.根据施加的电压来改变光学谐振器的损耗的Q开关35插入形成光谐振器的一对反射镜33和34的光路上。 光路快门39设置在激光发射光的光路上。 在执行激光发射的第一操作模式中，打开光路闸板39，并且施加到Q开关35的电压从高电压变为例如0V以在闪光灯之后发射脉冲激光 32激发激光棒31.在激光发射中断等待的第二操作模式中，光路闸板39关闭，施加到Q开关35的电压例如为0V。

    Photoacoustic image generation apparatus and acoustic wave unit
    8.
    发明申请
    Photoacoustic image generation apparatus and acoustic wave unit 有权
    光声图像生成装置和声波单元

    公开(公告)号：US20140148681A1

    公开(公告)日：2014-05-29

    申请号：US14167785

    申请日：2014-01-29

    Applicant: FUJIFILM Corporation

    Inventor： Kazuhiro HIROTA ,  Tadashi KASAMATSU

    IPC: A61B5/00

    CPC classification number: A61B5/0095 ,  A61B5/0075 ,  A61B5/14542 ,  H01S3/092 ,  H01S3/1022 ,  H01S3/1062 ,  H01S3/11 ,  H01S3/1623 ,  H01S3/1648

    Abstract: A pulse laser beam is emitted in a desired wavelength sequence using a laser source unit. A Q switch and a birefringent filter are inserted into an optical resonator including a pair of mirrors and facing each other with a laser rod interposed therebetween. The birefringent filter changes an oscillation wavelength of the optical resonator in association with rotational displacement. A trigger control circuit rotates the birefringent filter at a predetermined rotation speed depending on the number of wavelengths included in the wavelength sequence of the pulse laser beam to be emitted. In addition, the trigger control circuit irradiates the laser rod with excitation light, and turns on the Q switch at a timing when a rotational displacement position of the birefringent filter is set to a position corresponding to the wavelength of the pulse laser beam to be emitted, to cause the pulse laser beam to be emitted.

    Abstract translation: 使用激光源单元以期望的波长序列发射脉冲激光束。 将Q开关和双折射滤光器插入到包括一对反射镜的光学谐振器中并且彼此相对并且其间插入激光棒。 双折射滤波器与旋转位移相关联地改变光谐振器的振荡波长。 触发控制电路根据包含在要发射的脉冲激光束的波长序列中的波长数目以预定转速旋转双折射滤光器。 此外，触发控制电路用激发光照射激光棒，并且在将双折射滤光器的旋转位移位置设定为与要发射的脉冲激光束的波长相对应的位置的时刻，接通Q开关 以使脉冲激光束发射。

    Laser source unit, control method thereof, photoacoustic image generation apparatus and photoacoustic image generation method
    9.
    发明申请
    Laser source unit, control method thereof, photoacoustic image generation apparatus and photoacoustic image generation method 审中-公开
    激光源单元，其控制方法，光声图像生成装置和光声图像生成方法

    公开(公告)号：US20140148660A1

    公开(公告)日：2014-05-29

    申请号：US14167764

    申请日：2014-01-29

    Applicant: FUJIFILM Corporation

    Inventor： Kaku IRISAWA ,  Tadashi KASAMATSU

    IPC: A61B5/00 ,  A61B5/145 ,  H01S3/11

    CPC classification number: A61B5/0095 ,  A61B5/145 ,  A61B5/14542 ,  G01N21/1702 ,  G01N29/11 ,  G01N29/2418 ,  G01N29/46 ,  H01S3/061 ,  H01S3/08004 ,  H01S3/092 ,  H01S3/1022 ,  H01S3/1062 ,  H01S3/11

    Abstract: Using a laser source unit, a plurality of wavelengths are switched at a high speed without increasing a rotation speed of a birefringent-filter. A Q switch and a birefringent filter are inserted into an optical resonator including a pair of mirrors facing each other with a laser rod interposed therebetween. The birefringent-filter changes an oscillation wavelength of the optical resonator in association with rotational displacement. Driving unit reciprocatively rotates the birefringent-filter in a predetermined range including a discontinuous point of change characteristics of a transmission wavelength for the rotational displacement. An emission control unit irradiates the laser rod with excitation light from a flash lamp, and then turns on the Q switch at a timing when a rotational displacement position of the birefringent-filter is set to a position corresponding to the wavelength of the pulse laser beam to be emitted, to cause the pulse laser beam to be emitted.

    Abstract translation: 使用激光源单元，在不增加双折射滤光片的旋转速度的情况下高速切换多个波长。 将Q开关和双折射滤光器插入到包括相互面对的一对反射镜的光学谐振器中，其间插入激光棒。 双折射滤波器与旋转位移相关联地改变光谐振器的振荡波长。 驱动单元使双折射滤波器在包括用于旋转位移的透射波长的不连续变化特性的预定范围内往复旋转。 发射控制单元用激光灯从闪光灯照射激光棒，然后在将双折射滤光片的旋转位移位置设置为与脉冲激光束的波长相对应的位置的时刻接通Q开关 以发射脉冲激光束。

    STRUCTURE INSPECTION METHOD AND STRUCTURE INSPECTION SYSTEM
    10.
    发明申请
    STRUCTURE INSPECTION METHOD AND STRUCTURE INSPECTION SYSTEM 有权

    公开(公告)号：US20230082753A1

    公开(公告)日：2023-03-16

    申请号：US18050848

    申请日：2022-10-28

    Applicant: FUJIFILM Corporation

    Inventor： Tadashi KASAMATSU ,  Makoto YONAHA ,  Naoko YOSHIDA

    IPC: G01N21/88 ,  G01N29/06 ,  G01N22/02 ,  G06T7/00

    Abstract: Provided are a structure inspection method and a structure inspection system capable of efficiently inspecting structure and predicting deterioration with high accuracy. The structure inspection method includes: acquiring information on a location having internal damage within an inspection target region; and imaging the inspection target region with a visible light camera a plurality of times while shifting an imaging location, wherein a location except for the location having the internal damage is imaged with first pixel resolution and the location having internal damage is imaged with second pixel resolution higher than the first pixel resolution. Damage appearing on a surface of the structure is detected on the basis of a visible light image captured by the visible light camera. Information on the location having internal damage within the inspection target region is acquired by capturing an image that visualizes an internal state of the inspection target region.

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