公开(公告)号：US20230143460A1

公开(公告)日：2023-05-11

申请号：US17917060

申请日：2021-02-17

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takashi KURITA ,  Yuu TAKIGUCHI

IPC: G02B5/32 ,  B23K26/06 ,  B23K26/03 ,  B23K26/067

CPC classification number: G02B5/32 ,  B23K26/0626 ,  B23K26/032 ,  B23K26/0673 ,  B23K26/0665

Abstract: A laser processing apparatus includes a spatial light modulator for inputting laser light output from a laser light source and outputting laser light after phase modulation by a hologram, and a control unit for presenting, on the spatial light modulator, the hologram for focusing the laser light after the phase modulation output from the spatial light modulator on a plurality of irradiation points in a processing object by a focusing optical system. The control unit controls light intensities of at least two irradiation points included in the plurality of irradiation points independently of each other.

公开(公告)号：US20210397128A1

公开(公告)日：2021-12-23

申请号：US17347633

申请日：2021-06-15

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi HIROSE ,  Yoshitaka KUROSAKA ,  Yuu TAKIGUCHI

IPC: G03H1/04 ,  G03H1/00 ,  G03H1/26

Abstract: An image output device of the disclosure facilitates enlargement of a stereoscopic image and includes a spatial light modulator, an image irradiation unit, and an address light irradiation unit. The spatial light modulator includes a main surface, a back surface, and pixels, reflects light emitted to the main surface, and modulates a phase of the light for each pixel. The image irradiation unit irradiates the main surface with light including an optical image. The address light irradiation unit irradiates the back surface with address light including a diffraction grating pattern. Each pixel of the spatial light modulator changes a phase modulation amount according to the intensity of the address light from a back surface. The address light irradiation unit dynamically change a diffraction grating pattern's direction on the back surface. The image irradiation unit irradiates the main surface with the optical image corresponding to the diffraction grating pattern's direction.

公开(公告)号：US20200041810A1

公开(公告)日：2020-02-06

申请号：US16603906

申请日：2018-03-26

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Hiroto SAKAI ,  Taro ANDO ,  Haruyoshi TOYODA ,  Yoshiyuki OHTAKE ,  Yuu TAKIGUCHI ,  Tomoko HYODO

IPC: G02B27/48 ,  G03H1/12 ,  G02B21/06 ,  G06F7/58

Abstract: A pseudo speckle pattern generation apparatus includes a light source, a beam expander, and a spatial light modulator. The spatial light modulator has an intensity modulation distribution based on a pseudo speckle pattern calculated from a pseudo random number pattern and a correlation function, receives light output from the light source and increased in beam diameter by the beam expander, spatially modulates the received light according to the modulation distribution, and outputs modulated light.

公开(公告)号：US20190288483A1

公开(公告)日：2019-09-19

申请号：US16433127

申请日：2019-06-06

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takahiro SUGIYAMA ,  Yuu TAKIGUCHI ,  Yoshitaka KUROSAKA ,  Kazuyoshi HIROSE ,  Yoshiro NOMOTO ,  Soh UENOYAMA

IPC: H01S5/026 ,  H01S5/042

Abstract: The present embodiment relates to a single semiconductor light-emitting element including a plurality of light-emitting portions each of which is capable of generating light of a desired beam projection pattern and a method for manufacturing the semiconductor light-emitting element. In the semiconductor light-emitting element, an active layer and a phase modulation layer are formed on a common substrate layer, and the phase modulation layer includes at least a plurality of phase modulation regions arranged along the common substrate layer. The plurality of phase modulation regions are obtained by separating the phase modulation layer into a plurality of places after manufacturing the phase modulation layer, and as a result, the semiconductor light-emitting element provided with a plurality of light-emitting portions that have been accurately aligned can be obtained through a simple manufacturing process as compared with the related art.

公开(公告)号：US20190137744A1

公开(公告)日：2019-05-09

申请号：US15772648

申请日：2016-09-20

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuu TAKIGUCHI

IPC: G02B21/00 ,  G01N21/64 ,  G02B21/16 ,  G02B21/36

Abstract: An image acquisition device includes a light source, a spatial light modulator having a plurality of pixels two-dimensionally arranged and fro modulating a phase of excitation light output from the light source for each of the plurality of pixels, a first objective lens, a second objective lens, a photodetector, and a control unit for controlling an amount of phase modulation for each of the plurality of pixels in accordance with a two-dimensional phase pattern corresponding to the plurality of pixels. The phase pattern is generated based on a predetermined basic phase pattern. The basic phase pattern includes a first region in which the phase value continuously increases in a predetermined direction and a second region in which the phase value continuously decreases in the direction and facing the first region in the direction.

公开(公告)号：US20180109075A1

公开(公告)日：2018-04-19

申请号：US15556429

申请日：2016-03-11

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoshitaka KUROSAKA ,  Yuu TAKIGUCHI ,  Takahiro SUGIYAMA ,  Kazuyoshi HIROSE ,  Yoshiro NOMOTO

IPC: H01S5/183 ,  H01S5/42

CPC classification number: H01S5/18358 ,  H01S5/0683 ,  H01S5/105 ,  H01S5/187 ,  H01S5/42 ,  H01S5/423 ,  H01S2301/18 ,  H01S2301/20

Abstract: In a semiconductor light emitting element provided with an active layer 4, a pair of cladding layers 2, 7 between which the active layer 4 is interposed, and a phase modulation layer 6 optically coupled to the active layer 4, the phase modulation layer 6 includes a base layer 6A and a plurality of different refractive index regions 6B having different refractive indices from the base layer 6A. When an XYZ orthogonal coordinate system having a thickness direction of the phase modulation layer 6 as a Z-axis direction is set and a square lattice of a virtual lattice constant a is set in an XY plane, each of the different refractive index regions 6B is disposed so that a centroid position G thereof is shifted from a lattice point position in a virtual square lattice by a distance r, and the distance r is 0

公开(公告)号：US20170363876A1

公开(公告)日：2017-12-21

申请号：US15544935

申请日：2016-01-12

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Hiroto SAKAI ,  Yuu TAKIGUCHI

IPC: G02B27/09 ,  G03H1/08 ,  G03H1/00 ,  G03H1/22

Abstract: A light irradiation device includes a Gaussian beam output unit for outputting light having a light intensity distribution that conforms to a Gaussian distribution, a spatial light modulator for receiving the light and modulating the light by presenting a CGH, an optical system for converging the modulated light, and an amplitude mask arranged on at least one of an optical axis between the Gaussian beam output unit and the spatial light modulator and an optical axis between the spatial light modulator and the optical system. The amplitude mask has a circular-shaped first region centered on the optical axis and an annular-shaped second region that surrounds the first region. Transmittance in the second region continuously decreases as a distance from the optical axis increases.

公开(公告)号：US20230185238A1

公开(公告)日：2023-06-15

申请号：US17917069

申请日：2021-02-17

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takashi KURITA ,  Yuu TAKIGUCHI

IPC: G03H1/22

CPC classification number: G03H1/2294 ,  G03H1/2286 ,  G03H2225/32

Abstract: A laser processing apparatus includes a spatial light modulator for inputting laser light output from a laser light source and outputting laser light after phase modulation by a hologram, and a control unit for presenting, on the spatial light modulator, the hologram for focusing the laser light after the phase modulation output from the spatial light modulator on a plurality of irradiation points in a processing object by a focusing optical system. The control unit sets at least one of a shape and a size of a processing region defined by the irradiation points in a first plane intersecting an optical axis of the laser light and a processing region defined by the irradiation points in a second plane intersecting the optical axis and separated from the first plane in a direction of the optical axis to be different from each other.

公开(公告)号：US20200209653A1

公开(公告)日：2020-07-02

申请号：US16622497

申请日：2018-06-13

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuu TAKIGUCHI ,  Kazuyoshi HIROSE ,  Yoshitaka KUROSAKA ,  Takahiro SUGIYAMA ,  Yoshiro NOMOTO ,  Soh UENOYAMA

IPC: G02F1/015 ,  H01S5/00 ,  H01S5/068

Abstract: The present embodiment relates to a light-emitting device that enables reduction in attenuation or diffraction effect caused by a semiconductor light-emitting device with respect to modulated light outputted from a spatial light modulator, and the light-emitting device includes the semiconductor light-emitting device that outputs light from a light output surface and the reflection type spatial light modulator that modulates the light. The spatial light modulator includes a light input/output surface having the area larger than the area of a light input surface of the semiconductor light-emitting device, modulates light taken through a region facing the light output surface of the semiconductor light-emitting device in the light input/output surface, and outputs the modulated light from another region of the light input/output surface to a space other than the light input surface of the semiconductor light-emitting device.

公开(公告)号：US20190181613A1

公开(公告)日：2019-06-13

申请号：US16323625

申请日：2017-08-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoshitaka KUROSAKA ,  Kazuyoshi HIROSE ,  Takahiro SUGIYAMA ,  Yuu TAKIGUCHI ,  Yoshiro NOMOTO

IPC: H01S5/183 ,  H01S5/06 ,  H01S5/42 ,  H01S5/343 ,  H01S5/028 ,  H01S5/042

Abstract: The present embodiment relates to a light emitting device having a structure capable of removing zero order light from output light of an S-iPM laser. The light emitting device includes a semiconductor light emitting element and a light shielding member. The semiconductor light emitting element includes an active layer, a pair of cladding layers, and a phase modulation layer. The phase modulation layer has a basic layer and a plurality of modified refractive index regions, each of which is individually disposed at a specific position. The light shielding member has a function of passing through a specific optical image output along an inclined direction and shielding zero order light output along a normal direction of a light emitting surface.