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公开(公告)号：US20210356587A1
公开(公告)日：2021-11-18
申请号：US17388315
申请日：2021-07-29
Inventor： YUMIKO KATO , KAZUKI NAKAMURA
IPC: G01S17/08 , G01S7/481 , G01S17/89 , G01S7/486 , G01S7/4865 , G01S7/4861
Abstract: A distance measurement apparatus includes at least one light source that emits a light beam towards a scene, a light receiving device that includes a plurality of light receiving elements and receives reflected light of the light beam from a scene, a control circuit, and a signal processing circuit. The control circuit performs control such that at least one exposure operation, in which at least part of the plurality of light receiving elements receive the reflected light, detect a charge generated by the reflected light, and accumulate the generated charge, and an operation of outputting the accumulated charge are executed repeatedly, and the at least one light source emits a plurality of light beams toward the scene between consecutive two charge output operations such that light irradiation regions do not overlap. The signal processing circuit generates and outputs distance data based on light reception data generated based on the charge.
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公开(公告)号：US20220317481A1
公开(公告)日：2022-10-06
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：US20230273501A1
公开(公告)日：2023-08-31
申请号：US18313416
申请日：2023-05-08
Inventor： MASAHIKO TSUKUDA , AKIRA HASHIYA , KAZUKI NAKAMURA , YASUHISA INADA
CPC classification number: G02F1/295 , G02F1/1326 , G02F1/0142 , G02F1/0113
Abstract: An optical device includes a plurality of optical waveguide units arranged in a first direction. Each of the optical waveguide units includes a first mirror having a first reflecting surface, a second mirror having a second reflecting surface facing the first reflecting surface, and at least one optical waveguide region located between the first mirror and the second mirror. The distance between the first reflecting surface and the second reflecting surface is different for each of the optical waveguide units.
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公开(公告)号：US20230185118A1
公开(公告)日：2023-06-15
申请号：US18163277
申请日：2023-02-01
Inventor： TAKAIKI NOMURA , KAZUKI NAKAMURA , YASUHISA INADA
IPC: G02F1/03 , G02F1/01 , G02F1/1333 , G02F1/1335
CPC classification number: G02F1/0311 , G02F1/0115 , G02F1/133371 , G02F1/133555
Abstract: An optical device includes a first structure body with a first surface, a second structure body with a second surface facing the first surface, one or more optical guide regions positioned between the first surface of the first structure body and the second surface of the second structure body, the one or more optical guide regions including a liquid crystal material, and a first alignment film disposed on the first surface and aligning the liquid crystal material, the first alignment film being a rubbing alignment film, wherein the optical device further includes a second alignment film that is an optical alignment film formed by irradiation with polarized light.
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Patent Agency Ranking
公开(公告)号：US20210405289A1
公开(公告)日：2021-12-30
申请号：US17471687
申请日：2021-09-10
Inventor： KAZUKI NAKAMURA , YASUHISA INADA
Abstract: An optical device includes a first waveguide extending in a first direction and a second waveguide connected to the first waveguide. The second waveguide includes a first mirror, a second mirror, and an optical waveguide layer. At least either the first waveguide or the second waveguide has one or more gratings in a part of a connection region in which the first mirror, the second mirror, and the first waveguide overlap one another when seen from an angle parallel with a direction perpendicular to a first reflecting surface of the first mirror. The one or more gratings is at a distance that is longer than at least either a thickness of the first mirror or a thickness of the second mirror in the first direction from an end of the first mirror or the second mirror that is in the connection region.
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公开(公告)号：US20250036001A1
公开(公告)日：2025-01-30
申请号：US18914286
申请日：2024-10-14
Inventor： TAKAIKI NOMURA , KAZUKI NAKAMURA , YASUHISA INADA
IPC: G02F1/19 , G02F1/1335
Abstract: An optical device includes a first structure, a second structure, one or more optical waveguide regions, and a seal member. The first structure has a first surface. The second structure has a second surface facing the first surface. The one or more optical waveguide regions are located between the first surface of the first structure and the second surface of the second structure and contain a liquid crystal material. The seal member fixes a spacing between the first structure and the second structure, surrounds the one or more optical waveguide regions, and includes an opening through which the liquid crystal material is injected. A width of the opening in a first direction is greater than a width of the one or more optical waveguide regions in the first direction.
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公开(公告)号：US20240061117A1
公开(公告)日：2024-02-22
申请号：US18499292
申请日：2023-11-01
Inventor： YASUHISA INADA , KAZUYA HISADA , KAZUKI NAKAMURA , YUMIKO KATO , AKIRA HASHIYA
Abstract: A measurement device includes: a light source which emits laser light to irradiate a moving body and which can vary the frequency of the laser light; an interference optical system that separates the laser light into reference light and output light, and generates interference light by interfering the reference light with at least one reflected light beam generated when at least one light beam obtained from the output light is reflected by the moving body; a light detector that detects the interference light; and a processing circuit that processes a signal outputted from the light detector. The processing circuit generates and outputs a plurality of attribute data pertaining to the moving body on the basis of measurement data on the moving body obtained by processing the signal.
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公开(公告)号：US20220365403A1
公开(公告)日：2022-11-17
申请号：US17810835
申请日：2022-07-06
Inventor： TAKAIKI NOMURA , KAZUKI NAKAMURA , AKIRA HASHIYA , YASUHISA INADA
Abstract: An optical device includes a first substrate with a first surface spreading in a first direction and a second direction intersecting the first direction, a second substrate with a second surface facing the first surface, a film bonded to the first surface and/or the second surface through a siloxane bond, and at least one optical guide layer positioned between the first substrate and the second substrate, the optical guide layer including a dielectric member in contact with the film and guiding light in the first direction and/or the second direction.
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公开(公告)号：US20220113482A1
公开(公告)日：2022-04-14
申请号：US17556715
申请日：2021-12-20
Inventor： KAZUKI NAKAMURA , YASUHISA INADA
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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