公开(公告)号：US12181273B2

公开(公告)日：2024-12-31

申请号：US17175059

申请日：2021-02-12

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi Hirose ,  Hiroki Kamei ,  Takahiro Sugiyama ,  Akiyoshi Watanabe

IPC: G01B11/25 ,  G06T7/521 ,  G06V10/145

Abstract: A three-dimensional measurement device includes one or a plurality of light source units configured to irradiate the object to be measured SA with measurement light having a predetermined pattern, one or a plurality of image capture units configured to capture an image of the object to be measured which is irradiated with the measurement light, and a measurement unit configured to measure a three-dimensional shape of the object to be measured on the basis of results of image capture performed by the image capture units. The light source units are constituted by an S-iPMSEL of M-point oscillation.

公开(公告)号：US12051883B2

公开(公告)日：2024-07-30

申请号：US17787976

申请日：2020-12-23

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi Hirose ,  Yoshitaka Kurosaka ,  Soh Uenoyama

IPC: G02F1/015 ,  G02F1/025 ,  H01S5/00 ,  H01S5/026 ,  H01S5/11 ,  H01S5/185 ,  H01S5/18

CPC classification number: H01S5/0085 ,  G02F1/0151 ,  G02F1/025 ,  H01S5/026 ,  H01S5/0265 ,  H01S5/11 ,  H01S5/185 ,  G02F2201/12 ,  H01S5/18

Abstract: This disclosure relates to a spatial light modulator, etc., the spatial light modulator being capable of dynamically controlling the phase distribution of light, and provided with a structure having a smaller pixel arrangement period and suitable for high-speed operation. The spatial light modulator includes a substrate. The substrate has a front surface, a back surface, and through-holes arranged one-dimensionally or two-dimensionally and penetrating between the front surface and the back surface. The spatial light modulator further includes layered structures each covering the inner walls of the through-holes. Each layered structure includes a first electroconductive layer on the inner wall, a dielectric layer on the first electroconductive layer and having optical transparency, and a second electroconductive layer on the dielectric layer and having optical transparency. At least one of the first and second electroconductive layers is electrically isolated for each group including one or more through-holes.

公开(公告)号：US11923655B2

公开(公告)日：2024-03-05

申请号：US17269313

申请日：2019-08-27

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi Hirose ,  Yuu Takiguchi ,  Takahiro Sugiyama ,  Yoshitaka Kurosaka

IPC: H01S5/026 ,  H01S5/11 ,  H01S5/183 ,  H01S5/185 ,  H01S5/343

CPC classification number: H01S5/026 ,  H01S5/18305 ,  H01S5/185 ,  H01S5/11 ,  H01S5/34313 ,  H01S5/34353

Abstract: The present embodiment relates to a light emission device capable of removing zero-order light from output light of an S-iPM laser. The light emission device comprises an active layer and a phase modulation layer. The phase modulation layer includes a base layer and a plurality of modified refractive index regions. In a state in which a virtual square lattice is set on the phase modulation layer, a center of gravity of each modified refractive index region is separated from a corresponding lattice point, and a rotation angle around each lattice point that decides a position of the center of gravity of each modified refractive index region is set according to a phase distribution for forming an optical image. A lattice spacing and an emission wavelength satisfy a condition of M-point oscillation in a reciprocal lattice space of the phase modulation layer. A magnitude of at least one of in-plane wavenumber vectors in four directions formed in the reciprocal lattice space and each including a wavenumber spread corresponding to an angle spread of the output light is smaller than 2π/λ.

公开(公告)号：US11870218B2

公开(公告)日：2024-01-09

申请号：US16972825

申请日：2019-06-04

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi Hirose ,  Takahiro Sugiyama ,  Yuu Takiguchi ,  Yoshiro Nomoto ,  Soh Uenoyama

IPC: H01S5/185 ,  H01S5/042 ,  H01S5/00 ,  H01S5/183 ,  H01S5/343

CPC classification number: H01S5/185 ,  H01S5/005 ,  H01S5/04252 ,  H01S5/04254 ,  H01S5/18302 ,  H01S5/34333 ,  H01S5/34326

Abstract: A light emission device of one embodiment reduces zero-order light included in output of an S-iPM laser. The light emission device includes a light emission unit and a phase modulation layer. The phase modulation layer has a base layer and modified refractive index regions each including modified refractive index elements. In each unit constituent region centered on a lattice point of an imaginary square lattice set on the phase modulation layer, the distance from the corresponding lattice point to each of the centers of gravity of the modified refractive index elements is greater than 0.30 times and is not greater than 0.50 times of the lattice spacing. In addition, the distance from the corresponding lattice point to the center of gravity of the modified refractive index elements as a whole is greater than 0 and is not greater than 0.30 times of the lattice spacing.

公开(公告)号：US11777276B2

公开(公告)日：2023-10-03

申请号：US17749893

申请日：2022-05-20

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takahiro Sugiyama ,  Yuu Takiguchi ,  Yoshitaka Kurosaka ,  Kazuyoshi Hirose ,  Yoshiro Nomoto ,  Soh Uenoyama

IPC: H01S5/11 ,  H01S5/042 ,  H01S5/12 ,  H01S5/42 ,  H01S5/026 ,  H01S5/343 ,  H01S5/183

CPC classification number: H01S5/11 ,  H01S5/04256 ,  H01S5/42 ,  H01S5/026 ,  H01S5/0425 ,  H01S5/04254 ,  H01S5/1835 ,  H01S5/34313 ,  H01S5/34353 ,  H01S5/423 ,  H01S2301/16 ,  H01S2301/18 ,  H01S2301/20

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：US11626709B2

公开(公告)日：2023-04-11

申请号：US16769805

申请日：2018-11-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi Hirose ,  Yoshitaka Kurosaka ,  Yuu Takiguchi ,  Takahiro Sugiyama

IPC: H01S5/183 ,  H01S5/22 ,  H01S5/042 ,  H01S5/062

Abstract: The embodiment relates to a light-emitting device in which a positional relationship between a modified refractive index region's gravity-center position and the associated lattice point differs from a conventional device, and a production method. In this device, a stacked body including a light-emitting portion and a phase modulation layer optically coupled to the light-emitting portion is on a substrate. The phase modulation layer includes a base layer and plural modified refractive index regions in the base layer. Each modified refractive index region's gravity-center position locates on a virtual straight line passing through a corresponding reference lattice point among lattice points of a virtual square lattice on the base layer's design plane. A distance between the reference lattice point and the modified refractive index region's gravity center along the virtual straight line is individually set such that this device outputs light forming an optical image.

公开(公告)号：US11374383B2

公开(公告)日：2022-06-28

申请号：US16756513

申请日：2018-10-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yoshitaka Kurosaka ,  Kazuyoshi Hirose ,  Takahiro Sugiyama

IPC: H01S3/00 ,  H01S5/18 ,  H01S5/11

Abstract: A semiconductor light emitting element that can form a useful beam pattern is provided. A semiconductor laser element LD includes an active layer 4, a pair of cladding layers 2 and 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 different refractive index regions 6B that are different in refractive index from the base layer 6A. The different refractive index regions 6B desirably arranged in the phase modulation layer 6 enable emission of laser light including a dark line with no zero-order light.

公开(公告)号：US11309687B2

公开(公告)日：2022-04-19

申请号：US16769828

申请日：2018-11-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuyoshi Hirose ,  Yoshitaka Kurosaka ,  Yuu Takiguchi ,  Takahiro Sugiyama

IPC: H01S5/22 ,  H01S5/042 ,  H01S5/062 ,  H01S5/183

Abstract: The present embodiment relates to a light-emitting device or the like having a structure capable of reducing one power of ±1st-order light with respect to the other power. The light-emitting device includes a substrate, a light-emitting portion, and a phase modulation layer including a base layer and a plurality of modified refractive index regions. Each of the plurality of modified refractive index regions has a three-dimensional shape defined by a first surface facing the substrate, a second surface positioned on a side opposite to the substrate with respect to the first surface, and a side surface. In the three-dimensional shape, at least one of the first surface, the second surface, and the side surface has a portion inclined with respect to a main surface.

公开(公告)号：US10389088B2

公开(公告)日：2019-08-20

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: H01S5/00 ,  H01S5/183 ,  H01S5/42 ,  H01S5/10 ,  H01S5/187 ,  H01S5/0683

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：US09722396B2

公开(公告)日：2017-08-01

申请号：US15115713

申请日：2014-11-10

Applicant: Kyoto University ,  HAMAMATSU PHOTONICS K.K.

Inventor： Akiyoshi Watanabe ,  Yoshitaka Kurosaka ,  Kazuyoshi Hirose ,  Takahiro Sugiyama ,  Susumu Noda

IPC: H01S5/10 ,  H01S5/18 ,  H01S5/0683 ,  H01S5/022 ,  H01S5/187

CPC classification number: H01S5/0683 ,  H01S5/022 ,  H01S5/105 ,  H01S5/18 ,  H01S5/187

Abstract: A surface emitting laser element capable of emitting a main beam and a sub-beam, and a monitoring light detection element capable of detecting a light intensity of the sub-beam are included, the surface emitting laser element is a PCSEL, the main beam and the sub-beam are emitted in an upward direction of the surface emitting laser element and are inclined to each other at a predetermined angle, and respective changes in a peak light intensity of the main beam and a peak light intensity of the sub-beam with respect to a value of a driving current of the surface emitting laser element are correlated with each other. Therefore, if an output of the monitoring light detection element indicating the peak light intensity of the sub-beam is used, the peak light intensity of the main beam can be estimated.