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公开(公告)号：US11852534B2
公开(公告)日：2023-12-26
申请号：US17354948
申请日：2021-06-22
Inventor： Yasuhisa Inada , Atsushi Ishikawa
CPC classification number: G01J3/2823 , G01J3/12 , G02B5/201 , G02B5/288 , H04N23/80 , G01J2003/1213 , G01J2003/2826
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：US11835840B2
公开(公告)日：2023-12-05
申请号：US17574493
申请日：2022-01-12
Inventor： Akira Hashiya , Yasuhisa Inada , Taku Hirasawa , Yoshikazu Yamaoka , Nobuaki Nagao
CPC classification number: G02F1/295 , G01S7/4817 , G01S17/42 , G01S17/89 , G02B6/122 , G02F1/2955 , G02B2006/12104 , G02F2201/302
Abstract: An optical scanning device includes: a first waveguide that propagates light by total reflection; and a second waveguide. The second waveguide includes: a first multilayer reflective film; a second multilayer reflective film that faces the first multilayer reflective film; and a first optical waveguide layer directly connected to the first waveguide and located between the first and second multilayer reflective films. The first optical waveguide layer has a variable thickness and/or a variable refractive index and propagates the light transmitted through the first waveguide. The first multilayer reflective film has a higher light transmittance than the second multilayer reflective film and allows part of the light propagating through the first optical waveguide layer to be emitted to the outside. By changing the thickness of the first optical waveguide layer and/or its refractive index, the direction of the part of the light emitted from the second waveguide is changed.
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公开(公告)号：US11619858B2
公开(公告)日：2023-04-04
申请号：US17160908
申请日：2021-01-28
Inventor： Takaiki Nomura , Hiroyuki Takagi , Masahiko Tsukuda , Yasuhisa Inada , Taku Hirasawa
IPC: G02F1/295 , G02B6/12 , G02B27/00 , G02F1/035 , G02F1/13 , G02F1/1339 , G02F1/29 , G02B6/122 , G02B6/124 , G01S7/481 , G01S17/32
Abstract: An optical device includes a first substrate, a second substrate, a plurality of separation walls, one or more optical waveguides, and one or more spacers. The first substrate has a surface which extends in a first direction and a second direction intersecting the first direction. The second substrate faces the first substrate. The plurality of separation walls are positioned between the first substrate and the second substrate and extend in the first direction. The one or more optical waveguides are positioned between the first substrate and the second substrate and include one or more dielectric members which are positioned between the plurality of separation walls and which extend in the first direction. The one or more spacers are directly or indirectly sandwiched between the first substrate and the second substrate and positioned around the one or more optical waveguides.
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公开(公告)号：US10359155B2
公开(公告)日：2019-07-23
申请号：US15206273
申请日：2016-07-10
Inventor： Taku Hirasawa , Yasuhisa Inada , Akira Hashiya , Nobuaki Nagao , Akira Tsujimoto
IPC: F21V9/30 , F21K9/64 , H01S5/00 , F21V5/04 , F21Y115/10 , F21Y115/30
Abstract: A light-emitting apparatus includes an excitation light source that emits first light; a light-emitting device on an optical path of the first light, the light-emitting device emitting second light having a wavelength in air; and a first converging lens on an optical path of the second light. The light-emitting device comprises: a photoluminescent layer that emits the second light by being excited by the first light; and a light-transmissive layer on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a surface structure comprising projections or recesses arranged perpendicular to a thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction, the second light emitted from the light emitting surface. The surface structure limits the directional angle of the second light emittied from the light emitting surface.
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公开(公告)号：US10209509B1
公开(公告)日：2019-02-19
申请号：US16015225
申请日：2018-06-22
Inventor： Yasuhisa Inada , Akira Hashiya , Taku Hirasawa
Abstract: An optical scanning device includes: a first mirror; a second mirror; two non-waveguide regions; an optical waveguide region; and a first adjusting element. The optical waveguide region propagates light. 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 a refractive index of the common material exists. The first mirror allows part of the light propagating through the optical waveguide region to be emitted through the first mirror. The first adjusting element changes at least either the average refractive index of the optical waveguide region or a thickness of the optical waveguide region to change a direction of the light emitted through the first mirror.
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Patent Agency Ranking
公开(公告)号：US10115874B2
公开(公告)日：2018-10-30
申请号：US15166123
申请日：2016-05-26
Inventor： Yasuhisa Inada , Taku Hirasawa
Abstract: A light-emitting device comprises a photoluminescent layer that emits light including first light in an infrared region; and a light-transmissive layer located on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a periodic structure having projections or recesses or both arranged perpendicular to the thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction of the photoluminescent layer, the first light being emitted from the light emitting surface. A refractive index nwav-a of the photoluminescent layer for the first light and a period pa of the periodic structure satisfy λa/nwav-a
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公开(公告)号：US09890912B2
公开(公告)日：2018-02-13
申请号：US15214837
申请日：2016-07-20
Inventor： Akira Hashiya , Taku Hirasawa , Yasuhisa Inada , Yoshitaka Nakamura , Mitsuru Nitta , Takeyuki Yamaki
CPC classification number: F21K9/64 , F21S2/00 , G02B5/1809 , G02B5/1861 , G02B6/00 , H01L33/505 , H01L33/508 , H01L33/58
Abstract: A light-emitting apparatus includes a light-emitting device and an excitation light source. The light-emitting device includes a photoluminescent layer, a light-transmissive layer. At least one of the photoluminescent layer and the light-transmissive layer has a submicron structure having at least projections or recesses. Light emitted from the photoluminescent layer includes first light having a wavelength λa in air. The distance Dint between adjacent projections or recesses and the refractive index nwav-a of the photoluminescent layer for the first light satisfy λa/nwav-a
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公开(公告)号：US09880336B2
公开(公告)日：2018-01-30
申请号：US15215595
申请日：2016-07-21
Inventor： Yasuhisa Inada , Taku Hirasawa , Yoshitaka Nakamura , Akira Hashiya , Mitsuru Nitta , Takeyuki Yamaki
CPC classification number: G02B6/0003 , F21S2/00 , G02B5/18 , G02B6/00 , G02B6/0038 , G02B6/0055 , H01L27/156 , H01L33/22 , H01L33/46 , H01L33/50
Abstract: A light-emitting device includes a photoluminescent layer, a light-transmissive layer located on the photoluminescent layer, and a multilayer mirror layered together with the photoluminescent layer and the light-transmissive layer. At least one of the photoluminescent layer and the light-transmissive layer has a submicron structure. The submicron structure has at least projections or recesses arranged perpendicular to the thickness direction of the photoluminescent layer. The photoluminescent layer emits light including first light having a wavelength λa in air. The distance Dint between adjacent projections or recesses and the refractive index nwav-a of the photoluminescent layer for the first light satisfy λa/nwav-a
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公开(公告)号：US09871226B2
公开(公告)日：2018-01-16
申请号：US15036145
申请日：2014-10-09
Inventor： Kazuyuki Yamae , Yasuhisa Inada , Akira Hashiya
CPC classification number: H01L51/5268 , H01L51/0037 , H01L51/5056 , H01L51/5072 , H01L51/5088 , H01L51/5092 , H01L51/5275 , H01L51/5293
Abstract: This organic electroluminescent element includes: a light transmissive substrate; a light emitting stack including a first electrode, a light emitting layer, and a second electrode; and at least one light-outcoupling structure which has an uneven structure. The light emitting layer has a birefringence property with a higher refractive index in a direction parallel to a surface of the light transmissive substrate than a refractive index in a direction perpendicular to the surface of the light transmissive substrate. The uneven structure includes a plurality of protrusions which are individually allocated to some of planar matrix-like sections, and with regard to unit regions consisting of same number of sections of the planar matrix-like sections, a ratio of an area of one or more of the plurality of protrusions in a unit region is substantially constant in each unit region.
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公开(公告)号：US09647240B2
公开(公告)日：2017-05-09
申请号：US14891811
申请日：2014-01-17
Inventor： Akira Hashiya , Yasuhisa Inada , Kazuyuki Yamae
CPC classification number: H01L51/5275 , G02B3/0068 , G02B5/0242 , G02B5/0278 , H01L2251/5315 , H01L2251/5361
Abstract: An illuminator includes a light-emitting element and a light extraction sheet which transmits light occurring from the light-emitting element. The light-emitting element includes a first electrode having a light transmitting property, a second electrode, and an emission layer between the first and second electrodes. The light extraction sheet includes a light-transmitting substrate having a first face and a second face, a first light extraction structure on the first face side of the light-transmitting substrate, and a second light extraction structure on the second face side of the light-transmitting substrate. The first light extraction structure includes a low-refractive index layer and a high-refractive index layer having a higher refractive index than the low-refractive index layer. The second light extraction structure is arranged so that light which is transmitted through the light-transmitting substrate and arrives at an incident angle of 60 to 80 degrees has an average transmittance of 20% or more.
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