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公开(公告)号：US12147094B2
公开(公告)日：2024-11-19
申请号：US17807741
申请日：2022-06-20
Inventor： Akira Hashiya , Yasuhisa Inada , Kazuki Nakamura
Abstract: An optical device includes a plurality of optical waveguides, and a planar optical waveguide. The plurality of optical waveguides each extend in a first direction, and are arranged in a second direction intersecting the first direction. The planar optical waveguide is connected directly or indirectly with the plurality of optical waveguides. The plurality of optical waveguides each allow light to propagate in the first direction. The planar optical waveguide includes a first mirror and a second mirror, and an optical waveguide layer. The first mirror and the second mirror face each other, and extend in the first direction and the second direction. The optical waveguide layer is located between the first mirror and the second mirror.
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公开(公告)号：US12130481B2
公开(公告)日：2024-10-29
申请号：US17556715
申请日：2021-12-20
Inventor： Kazuki Nakamura , Yasuhisa Inada
CPC classification number: G02B6/4214 , G01S7/4817 , G01S17/42 , G02B6/12 , G02B6/12004 , G02B6/122 , G02B6/125 , G02B6/34 , G02B2006/12104
Abstract: A light emitting device includes a waveguide element including a first mirror that is light transmissive, a second mirror that faces the first mirror, and an optical waveguide layer located between the first mirror and the second mirror, the waveguide element allowing light input to the optical waveguide layer to propagate along a first direction and to be emitted through the first mirror; a first photodetector that is located on a path of light to be input to the optical waveguide layer or on another path branching off from the path and outputs a first signal according to an amount of received light; and a second photodetector that is located on a path of light that has propagated through the optical waveguide layer along the first direction and passed the optical waveguide layer and outputs a second signal according to an amount of received light.
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公开(公告)号：US11658457B2
公开(公告)日：2023-05-23
申请号：US16780856
申请日：2020-02-03
Inventor： Takahiro Miyake , Yasuhisa Inada , Tosihiko Wada
CPC classification number: H01S5/022 , G02B5/18 , G02B6/02209 , G02B6/34 , G02B6/42 , G02B6/4204 , G02B6/4214 , H01S5/023
Abstract: A mounting structure for an optical module includes a light emitting element, a submount board on which the light emitting element is mounted, a main board on which the submount board is mounted, a light guide member provided on the main board, and a diffraction grating optical coupler provided on the main board and connected to the light guide member. The submount board and the main board are bonded to each other on a surface of the submount board different from a surface on which the light emitting element is mounted.
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公开(公告)号：US11480818B2
公开(公告)日：2022-10-25
申请号：US17151398
申请日：2021-01-18
Inventor： Yasuhisa Inada , Atsushi Ishikawa , Yumiko Kato
Abstract: An optical scan device includes an optical waveguide array, including a plurality of optical waveguides each of which propagates light along a first direction, that emits a light beam, the plurality of optical waveguides being arranged in a second direction that intersects the first direction, a phase shifter array including a plurality of phase shifters connected separately to each of the plurality of optical waveguides, a control circuit that controls a phase shift amount of each of the plurality of phase shifters and/or inputting of light to each of the plurality of phase shifters and thereby controls a direction and shape of the light beam that is emitted from the optical waveguide array, a photodetector that detects the light beam reflected by a physical object, and a signal processing circuit that generates distance distribution data on the basis of output from the photodetector.
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公开(公告)号：US11435571B2
公开(公告)日：2022-09-06
申请号：US16901760
申请日：2020-06-15
Inventor： Yasuhisa Inada , Akira Hashiya , Taku Hirasawa
Abstract: An optical scanning device includes: a first mirror; a second mirror opposed to the first mirror; two non-waveguide regions sandwiched between the first mirror and the second mirror; an optical waveguide region disposed between the two non-waveguide regions; and two intermediate regions. The average refractive index of the optical waveguide region is higher than the average refractive index of each intermediate region. The average refractive index of each intermediate region is higher than the average refractive index of each non-waveguide region. The first mirror allows part of light propagating through the optical waveguide region to be emitted as emission light in a third direction. By changing the refractive index and/or thickness of the optical waveguide region, the third direction, which is the emission direction of the emission light, is changed.
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Patent Agency Ranking
公开(公告)号：US20220099809A1
公开(公告)日：2022-03-31
申请号：US17544750
申请日：2021-12-07
Inventor： Kazuya Hisada , Yasuhisa Inada , Yumiko Kato
Abstract: A light emitting device includes a light source that emits an optical beam in response to a control signal, an optical deflector that changes a direction of the optical beam in response to a driving voltage, and a control circuit that controls a timing of emission of the optical beam and the direction of the optical beam. The optical deflector is configured to change the direction of the optical beam along a first direction and a second direction different from the first direction and a rate of change in the direction of the optical beam along the first direction is lower than a rate of change in the direction of the optical beam along the second direction.
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公开(公告)号：US10422990B2
公开(公告)日：2019-09-24
申请号：US16230414
申请日：2018-12-21
Inventor： Yasuhisa Inada , Akira Hashiya , Taku Hirasawa
Abstract: An optical scanning device including: a first mirror having a first reflecting surface; a second mirror having a second reflecting surface; two non-waveguide regions disposed between the first and second mirrors and that are spaced apart from each other in a first direction parallel to at least either the first reflecting surface or the second reflecting surface; and an optical waveguide region disposed between the first and second mirrors and that is sandwiched between the two non-waveguide regions. The optical waveguide region propagates light in a second direction that crosses the first direction. The optical waveguide region and the two non-waveguide regions include respective first regions in which a common material exists. The optical waveguide region or each of the two non-waveguide regions further includes a second region in which a first material having a refractive index different from the refractive index of the common material exists.
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公开(公告)号：US10094522B2
公开(公告)日：2018-10-09
申请号：US15446453
申请日：2017-03-01
Inventor： Taku Hirasawa , Yasuhisa Inada , Akira Hashiya
Abstract: A light-emitting device comprises a layered structure between a first layer and a second layer. The first layer has a refractive index n1 for first light having a wavelength λa in air. The second layer has a refractive index n2 for the first light. The layered structure comprises: a photoluminescent layer having a first surface facing the first layer and a second surface facing the second layer; and a surface structure disposed on at least one selected from the group consisting of the first surface and the second surface of the photoluminescent layer. The refractive index n1 and the refractive index n2 are lower than a refractive index nwav-a of the photoluminescent layer for the first light. The layered structure has an effective thickness to more strongly emit TE polarized light than TM polarized light.
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公开(公告)号：US09515239B2
公开(公告)日：2016-12-06
申请号：US14618591
申请日：2015-02-10
Inventor： Yasuhisa Inada , Taku Hirasawa , Yoshitaka Nakamura , Akira Hashiya , Mitsuru Nitta , Takeyuki Yamaki
IPC: H01L33/00 , H01L33/58 , H01L33/50 , H01L27/118 , H01L31/0232 , H01L31/12
CPC classification number: H01L33/58 , H01L31/02322 , H01L31/12 , H01L31/125 , H01L33/00 , H01L33/505 , H01L2027/11853
Abstract: A light-emitting device includes a photoluminescent layer that emits light containing first light, and a light-transmissive layer located on or near the photoluminescent layer. A submicron structure is defined on at least one of the photoluminescent layer and the light-transmissive layer. The submicron structure includes at least projections or recesses. The submicron structure has spatial frequency components distributed at least from more than 0 to 2/Dint(min) as determined by two-dimensional Fourier transform of a pattern of the projections or recesses and satisfies the following relationship: 0.8Dint(min)
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公开(公告)号：US09214649B2
公开(公告)日：2015-12-15
申请号：US14570015
申请日：2014-12-15
Inventor： Yasuhisa Inada , Taku Hirasawa , Manabu Nakata
CPC classification number: H01L51/5262 , H01L51/5203 , H01L51/5218 , H01L51/5231 , H01L51/5271
Abstract: A light-emitting device includes: a light-emitting element including a transparent electrode, a reflecting electrode, and an organic layer that includes a light-emitting layer; a transparent multilayer body including a low-refractive-index layer and a high-refractive-index layer, the high-refractive-index layer being provided in contact with the transparent electrode; a first uneven structure at an interface between the low-refractive-index layer and the high-refractive-index layer, the first uneven structure including depressions and projections, a height of each of the projections relative to the depressions being 400 nm or more; and a second uneven structure at an interface between the reflecting electrode and the organic layer, the second uneven structure including depressions and projections, a height of each of the projections relative to the depressions in the second uneven structure being 20 nm or more and 100 nm or less.
Abstract translation: 发光装置包括：发光元件，其包括透明电极，反射电极和包括发光层的有机层; 包括低折射率层和高折射率层的透明多层体，所述高折射率层设置成与所述透明电极接触; 在低折射率层和高折射率层之间的界面处的第一不平坦结构，包括凹陷和突起的第一不平坦结构，每个凸起相对于凹陷的高度为400nm以上; 以及在反射电极和有机层之间的界面处的第二不平坦结构，所述第二凹凸结构包括凹陷和突起，每个凸起相对于第二凹凸结构中的凹陷的高度为20nm以上且100nm 或更少。
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