公开(公告)号：US10429720B2

公开(公告)日：2019-10-01

申请号：US14428854

申请日：2013-09-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Hiroshi Saito ,  Masatoshi Fujimoto ,  Shingo Oishi ,  Kenshi Fukumitsu

IPC: G02F1/37 ,  G02B5/30 ,  G02F1/1337 ,  G02F1/1362 ,  G02F1/29 ,  G03F7/20 ,  G02F1/1335 ,  G02F1/35

Abstract: The device includes a spatial light modulation section having a phase modulation plane to which laser light L1 in a wavelength region longer than an ultraviolet region is input, and on which a phase of the laser light L1 is modulated at each of a plurality of two-dimensionally arrayed regions, to generate modulated laser light L2, a wavelength conversion section having a light incident plane which receives the modulated laser light L2 output from the spatial light modulation section, and converting a wavelength of the modulated laser light L2 into a wavelength in the ultraviolet region, and an image transfer optical system coupling the phase modulation plane of the spatial light modulation section and the light incident plane of the wavelength conversion section, so as to be optically conjugate systems to each other.

公开(公告)号：US12098920B2

公开(公告)日：2024-09-24

申请号：US17798377

申请日：2021-01-21

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuhito Mase ,  Masatoshi Fujimoto ,  Tomofumi Suzuki

IPC: G01B9/02091 ,  G01N21/17 ,  H04N25/10 ,  H04N25/70 ,  G01N21/47

CPC classification number: G01B9/02091 ,  G01N21/17 ,  H04N25/10 ,  H04N25/70 ,  G01N2021/4761

Abstract: An optical coherence tomography device includes a light source, a mirror device including a movable mirror configured to perform a reciprocating operation, a support part configured to support an object, a beam splitter configured to generate interfering light, an optical sensor configured to detect the interfering light, and a control unit. Each of the plurality of pixels included in the optical sensor includes a light receiving part, a plurality of transfer gates, and a discharge gate. The control unit applies an electric signal to the optical sensor so that the plurality of transfer gates are sequentially brought into a charge transfer state in at least three time ranges separated from each other and the discharge gate is brought into a charge discharge state in a time range other than the at least three time ranges for each period of an interferogram signal of the interfering light.

公开(公告)号：US10205296B2

公开(公告)日：2019-02-12

申请号：US15616270

申请日：2017-06-07

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  HAMAMATSU PHOTONICS K.K. ,  NTT Advanced Technology Corporation

Inventor： Seiji Toyoda ,  Yuzo Sasaki ,  Takashi Sakamoto ,  Joji Yamaguchi ,  Tadashi Sakamoto ,  Koei Yamamoto ,  Masatoshi Fujimoto ,  Mahiro Yamada ,  Shogo Yagi ,  Yukihiko Ushiyama ,  Eiichi Sugai ,  Koji Yoneyama ,  Kazuo Fujiura

IPC: H01S5/062 ,  H01S3/107 ,  H01S5/14 ,  H01S3/08 ,  G01B9/02

Abstract: Provided is a swept light source including one end surface coupled to a wavelength filter constituted of a diffraction grating and an end mirror via a light deflector and another end surface including a gain medium facing an output coupling mirror and which configures a laser cavity between the end mirror and the output coupling mirror, wherein a drive voltage having an AC voltage on which a DC bias voltage is superimposed is output from a control voltage source of the light deflector to an electrode pair of an electro-optic crystal, light is radiated from a light emitter to the electro-optic crystal, and incident light from the gain medium incident along an optical axis perpendicular to a direction of an electric field formed by the control voltage is deflected in a direction parallel to the electric field, so that wavelength sweeping is performed.

公开(公告)号：US20170358899A1

公开(公告)日：2017-12-14

申请号：US15616270

申请日：2017-06-07

Applicant: Nippon Telegraph and Telephone Corporation ,  Hamamatsu Photonics K.K. ,  NTT Advanced Technology Corporation

Inventor： Seiji TOYODA ,  Yuzo Sasaki ,  Takashi Sakamoto ,  Joji Yamaguchi ,  Tadashi Sakamoto ,  Koei Yamamoto ,  Masatoshi Fujimoto ,  Mahiro Yamada ,  Shogo Yagi ,  Yukihiko Ushiyama ,  Eiichi Sugai ,  Koji Yoneyama ,  Kazuo Fujiura

IPC: H01S3/107 ,  H01S3/08 ,  G01B9/02

CPC classification number: H01S3/1075 ,  G01B9/02004 ,  G01B9/02091 ,  H01S3/08009 ,  H01S3/107 ,  H01S5/06216 ,  H01S5/141 ,  H01S5/143

Abstract: Provided is a swept light source including one end surface coupled to a wavelength filter constituted of a diffraction grating and an end mirror via a light deflector and another end surface including a gain medium facing an output coupling mirror and which configures a laser cavity between the end mirror and the output coupling mirror, wherein a drive voltage having an AC voltage on which a DC bias voltage is superimposed is output from a control voltage source of the light deflector to an electrode pair of an electro-optic crystal, light is radiated from a light emitter to the electro-optic crystal, and incident light from the gain medium incident along an optical axis perpendicular to a direction of an electric field formed by the control voltage is deflected in a direction parallel to the electric field, so that wavelength sweeping is performed.

公开(公告)号：US20150219980A1

公开(公告)日：2015-08-06

申请号：US14428854

申请日：2013-09-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Hiroshi Saito ,  Masatoshi Fujimoto ,  Shingo Oishi ,  Kenshi Fukumitsu

IPC: G02F1/37 ,  G02F1/1337

CPC classification number: G02F1/37 ,  G02B5/3091 ,  G02F1/133553 ,  G02F1/1337 ,  G02F1/136277 ,  G02F1/292 ,  G02F1/3534 ,  G02F2203/18 ,  G03F7/70291

Abstract: The device includes a spatial light modulation section having a phase modulation plane to which laser light L1 in a wavelength region longer than an ultraviolet region is input, and on which a phase of the laser light L1 is modulated at each of a plurality of two-dimensionally arrayed regions, to generate modulated laser light L2, a wavelength conversion section having a light incident plane which receives the modulated laser light L2 output from the spatial light modulation section, and converting a wavelength of the modulated laser light L2 into a wavelength in the ultraviolet region, and an image transfer optical system coupling the phase modulation plane of the spatial light modulation section and the light incident plane of the wavelength conversion section, so as to be optically conjugate systems to each other.

Abstract translation: 该装置包括：空间光调制部，具有输入比紫外线区域长的波长区域中的激光L1的相位调制面，激光L1的相位在多个二极管中的每一个被调制， 生成调制激光L2，具有光入射面的波长转换部，其接收从空间光调制部输出的调制激光L2，并将调制后的激光L2的波长转换为 以及将空间光调制部的相位调制面和波长转换部的光入射面耦合的图像传输光学系统，以便是彼此的光学共轭系统。