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公开(公告)号：US09518215B2
公开(公告)日：2016-12-13
申请号：US14618254
申请日：2015-02-10
Inventor： Taku Hirasawa , Yasuhisa Inada , Yoshitaka Nakamura , Akira Hashiya , Mitsuru Nitta , Takeyuki Yamaki
CPC classification number: C09K11/00 , C09K11/7721 , H01L33/508 , H05B33/14
Abstract: A light-emitting device includes a photoluminescent layer that emits light containing first light, a light-transmissive layer located on or near the photoluminescent layer, and one or more reflectors. A submicron structure is defined on at least one of the photoluminescent layer and the light-transmissive layer. The one or more reflector are located outside the submicron structure. The submicron structure includes at least projections or recesses and satisfies the following relationship: λa/nwav-a
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公开(公告)号：US12250475B2
公开(公告)日：2025-03-11
申请号：US17718428
申请日：2022-04-12
Inventor： Yasuhisa Inada , Atsushi Ishikawa , Motoki Yako
Abstract: A filter array according to one aspect of the present disclosure is provided with filters arranged two-dimensionally. The filters include multiple types of first filters having mutually different transmission spectra, of which each transmission spectrum includes first peaks, and multiple types of second filters having mutually different transmission spectra, of which each transmission spectrum includes one or more second peaks. The number of the first peaks in the transmission spectrum of each of the multiple types of first filters is greater than the number of the one or more second peaks in the transmission spectrum of each of the multiple types of second filters, and the multiple types of first filters and the multiple types of second filters are disposed in a mixed arrangement.
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公开(公告)号：US12248140B2
公开(公告)日：2025-03-11
申请号：US17695743
申请日：2022-03-15
Inventor： Kenji Narumi , Yasuhisa Inada
Abstract: An optical device includes an optical deflector that emits, through a light exit surface parallel to a first direction and a second direction intersecting the first direction and in a direction intersecting the light exit surface, an optical beam having a shape extending in the second direction and that is configured to cause a direction of emission of the optical beam to change along the first direction and an optical element, placed on a path of the optical beam, that expands an extent of spread of the optical beam in the second direction.
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公开(公告)号：US12235160B2
公开(公告)日：2025-02-25
申请号：US18505552
申请日：2023-11-09
Inventor： Yasuhisa Inada , Atsushi Ishikawa
Abstract: An optical filter includes a filter array including filters two-dimensionally arrayed and a band-pass filter. The filters includes first and second filters. A transmission spectrum of each of the first and second filters has local maximum values of transmittance at three or more wavelengths included in a first wavelength region. The band-pass filter passes light in a second wavelength region including two or more wavelengths of the three or more wavelengths and not including one or more wavelengths of the three or more wavelengths. The filter array and the band-pass filter are disposed so that (a) the band-pass filter is located on an optical path of light that passes through the first and second filters or (b) the first and second filters are located on an optical path of light that passes through the band-pass filter.
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公开(公告)号：US12204187B2
公开(公告)日：2025-01-21
申请号：US18529937
申请日：2023-12-05
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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Patent Agency Ranking
56.发明授权公开(公告)号：US12146966B2
公开(公告)日：2024-11-19
申请号：US17529239
申请日：2021-11-17
Inventor： Yumiko Kato , Yasuhisa Inada , Toshiyasu Sugio , Noritaka Iguchi
IPC: G01S17/00 , G01S7/48 , G01S17/931
Abstract: A distance measurement apparatus comprises a light emitter that emits a plurality of light beams toward a scene in different directions and at different timings, a light receiver that includes an array of a plurality of light-receiving elements and detects reflected light from the scene produced by the emission of each light beam with the plurality of light-receiving elements, and a signal processing circuit that generates and outputs output data including measurement data indicating the positions or distances of a plurality of points in the scene on the basis of a signal outputted by the light receiver. The output data includes the data of a plurality of blocks, and individual time data is attached to each of the plurality of blocks.
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公开(公告)号：US12038606B2
公开(公告)日：2024-07-16
申请号：US17488391
申请日：2021-09-29
Inventor： Akira Hashiya , Yasuhisa Inada , Masanori Era
CPC classification number: G02B6/124 , G01S7/4817
Abstract: An optical device includes a first mirror having a first reflecting surface and extending along a first direction, a second mirror having a second reflecting surface that faces the first reflecting surface and extending along the first direction, and an optical waveguide layer, located between the first mirror and the second mirror, that causes light to propagate along the first direction. A transmittance of the first mirror is higher than a transmittance of the second mirror. A reflection spectrum of at least either the first mirror or the second mirror with respect to light arriving from a direction normal to the reflecting surface includes, in a wavelength region in which a reflectance is higher than or equal to 90%, a local maximum point and first and second points of inflection located closer to a long-wavelength side than the local maximum point.
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公开(公告)号：US11867991B2
公开(公告)日：2024-01-09
申请号：US17944802
申请日：2022-09-14
Inventor： Yasuhisa Inada , Atsushi Ishikawa , Yumiko Kato
CPC classification number: G02F1/13312 , G02B6/12009 , G02B6/29343 , G02B6/3546
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：US11843876B2
公开(公告)日：2023-12-12
申请号：US17395927
申请日：2021-08-06
Inventor： Atsushi Ishikawa , Yasuhisa Inada , Kazuya Hisada
IPC: H04N25/13 , G01J3/26 , H01L27/146
CPC classification number: H04N25/136 , G01J3/26 , H01L27/14621 , H01L27/14645
Abstract: An optical filter array is used in a photodetection device that generates image data separately for each of N (where N is an integer greater than or equal to 4) wavelength bands. The optical filter array includes a plurality of optical filters. The plurality of optical filters include plural types of optical filters differing in transmittance from each other in each of the N wavelength bands. Assuming that pi is an average of transmittances of the plurality of optical filters for light in an ith wavelength band (where i is an integer greater than or equal to 1 and less than or equal to N) of the N wavelength bands, a standard deviation of the average μi of the transmittances for the N wavelength bands is less than or equal to 0.13.
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公开(公告)号：US11256043B2
公开(公告)日：2022-02-22
申请号：US16984746
申请日：2020-08-04
Inventor： Akira Hashiya , Yasuhisa Inada , Taku Hirasawa
Abstract: An optical device includes a first waveguide that propagates light in a first direction; and a second waveguide including a first mirror, a second mirror, and an optical waveguide layer. The first mirror extends in the first direction and has a first reflecting surface, and the second mirror extends in the first direction and has a second reflecting surface. The optical waveguide layer is located between the first and second mirrors and propagates the light in the first direction. A forward end portion of the first waveguide is disposed inside the optical waveguide layer. In a region in which the first and second waveguides overlap each other when viewed in a direction perpendicular to the first reflecting surface, at least part of the first waveguide and/or at least part of the second waveguide includes at least one grating whose refractive index varies periodically in the first direction.
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