JP6538178B2 - 発光装置 - Google Patents
発光装置 Download PDFInfo
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- JP6538178B2 JP6538178B2 JP2017537579A JP2017537579A JP6538178B2 JP 6538178 B2 JP6538178 B2 JP 6538178B2 JP 2017537579 A JP2017537579 A JP 2017537579A JP 2017537579 A JP2017537579 A JP 2017537579A JP 6538178 B2 JP6538178 B2 JP 6538178B2
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- light
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 291
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- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical group [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 claims description 30
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 claims description 30
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- -1 Lutetium Aluminum Chemical compound 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- QVMHUALAQYRRBM-UHFFFAOYSA-N [P].[P] Chemical compound [P].[P] QVMHUALAQYRRBM-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- BEZBEMZKLAZARX-UHFFFAOYSA-N alumane;gadolinium Chemical compound [AlH3].[Gd] BEZBEMZKLAZARX-UHFFFAOYSA-N 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical group O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
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- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
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- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/90—Methods of manufacture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
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- F21—LIGHTING
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- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
- F21V7/30—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings the coatings comprising photoluminescent substances
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- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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- G—PHYSICS
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0087—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/02208—Mountings; Housings characterised by the shape of the housings
- H01S5/02212—Can-type, e.g. TO-CAN housings with emission along or parallel to symmetry axis
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/323—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
- H01S5/32308—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm
- H01S5/32341—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm blue laser based on GaN or GaP
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Semiconductor Lasers (AREA)
Description
励起光の波長の10分の1以下である蛍光体板であり、上記励起光源は、上記励起光として、420nm以上かつ490nm以下の波長範囲のレーザ光を出射する半導体レーザであり、上記空隙の幅は、0nm以上かつ40nm以下である。
本発明の実施形態1について、図1〜図4に基づいて説明すれば、以下の通りである。
図1の(a)は、本実施形態の発光装置100の構成を示す図である。また、図1の(b)は、発光装置100に含まれる発光部1の構成を概略的に示す図である。発光装置100は、発光部1、半導体レーザ10a〜10c(励起光源)、光ファイバ11a〜11c、バンドルファイバ12、フェルール13、フェルール固定部14、固定部15、レンズ16(投光光学系)、レンズ固定部17、および放熱部18を備えている。
ここで、発光部1の効果(換言すれば、発光装置100の効果)の説明に先立ち、比較例について説明する。図4の(a)および(b)はそれぞれ、発光部1の比較例を示す図である。
本実施形態の発光装置100において、発光部1は、蛍光体層1aおよび励起光配光制御部1bを備えている。上述したように、励起光配光制御部1bは、レーザ光L1の配光を制御し、当該レーザ光L1を蛍光体層1aの内部に導くことができる。
本発明の実施形態2について、図5および図6に基づいて説明すれば、以下の通りである。なお、説明の便宜上、前記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。
本発明の実施形態3について、図7に基づいて説明すれば、以下の通りである。本実施形態の発光装置300は、実施形態1の発光装置100において、(i)発光部1を発光部3に置き換え、かつ、(ii)基板31を付加した構成である。図7は、発光装置300に含まれる発光部3の周辺の構成を概略的に示す図である。
本発明の実施形態4について、図8に基づいて説明すれば、以下の通りである。本実施形態の発光装置400は、実施形態1の発光装置100において、反射部41(遮光部)を付加した構成である。図8は、発光装置400に含まれる発光部3の周辺の構成を概略的に示す図である。
上述の実施形態4では、遮光部として反射部41を利用する構成について説明を行った。しかしながら、本発明の一態様に係る遮光部は、光を遮光する(光を透過させない)機能を有するものであればよく、必ずしも反射部のみに限定されない。
本発明の実施形態5について、図9に基づいて説明すれば、以下の通りである。本実施形態の発光装置500は、実施形態1の発光装置100において、(i)発光部1を発光部5に置き換え、かつ、(ii)反射部51(遮光部)を付加した構成である。図9は、発光装置500に含まれる発光部5の周辺の構成を概略的に示す図である。
本発明の態様1に係る発光装置(100)は、励起光(レーザ光L1)を照明光の一部として出射する発光装置であって、可視光である上記励起光を出射する励起光源(半導体レーザ10a〜10c)と、上記励起光源から出射された励起光を受けて蛍光(L2)を発する小空隙蛍光体板からなる蛍光体層(1a)と、上記励起光の配光を制御し、上記蛍光体層の内部へ上記励起光を導く励起光配光制御部(1b)と、を備え、上記小空隙蛍光体板は、内部に存在する空隙の幅が、0nm以上かつ上記励起光の波長の10分の1以下である蛍光体板である。
本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。さらに、各実施形態にそれぞれ開示された技術的手段を組み合わせることにより、新しい技術的特徴を形成することができる。
なお、本発明は、以下のようにも表現できる。
1a 蛍光体層
1b 励起光配光制御部
1bs 封止層
1bp 散乱体粒子
1bt 散乱層(凹凸形状)
21 ダイクロイックミラー
31 基板
41,51 反射部(遮光部)
100,200,300,400,500 発光装置
Claims (16)
- 励起光を照明光の一部として出射する発光装置であって、
可視光である上記励起光を出射する励起光源と、
上記励起光源から出射された励起光を受けて蛍光を発する小空隙蛍光体板からなる蛍光体層と、
上記励起光の配光を制御し、上記蛍光体層の内部へ上記励起光を導く励起光配光制御部と、を備え、
上記小空隙蛍光体板は、内部に存在する空隙の幅が、0nm以上かつ上記励起光の波長の10分の1以下である蛍光体板であり、
上記励起光源は、上記励起光として、420nm以上かつ490nm以下の波長範囲のレーザ光を出射する半導体レーザであり、
上記空隙の幅は、0nm以上かつ40nm以下であることを特徴とする発光装置。 - 上記励起光は、上記蛍光体層の励起光照射面の一部の領域に照射されることを特徴とする請求項1に記載の発光装置。
- 上記蛍光体層に含まれている蛍光体は、単結晶または多結晶のガーネット系蛍光体であることを特徴とする請求項1または2に記載の発光装置。
- 上記蛍光体層に含まれている蛍光体は、単結晶のガーネット系蛍光体であることを特徴とする請求項3に記載の発光装置。
- 上記ガーネット系蛍光体は、YAG(イットリウム・アルミニウム・ガーネット)蛍光体であることを特徴とする請求項3または4に記載の発光装置。
- 上記励起光配光制御部は、上記励起光を散乱させることにより上記励起光の配光を制御
することを特徴とする請求項1から5のいずれか1項に記載の発光装置。 - 上記励起光配光制御部は、上記励起光を散乱させる散乱体粒子を封止した封止層であることを特徴とする請求項6に記載の発光装置。
- 上記封止層の厚さは、10μm以上かつ50μm以下であることを特徴とする請求項7に記載の発光装置。
- 上記励起光配光制御部として、上記蛍光体層の励起光照射面に凹凸形状が形成されていることを特徴とする請求項6に記載の発光装置。
- 上記励起光を透過させるとともに、上記蛍光を反射するダイクロイックミラーを、上記蛍光体層の、上記励起光の入射側にさらに備えていることを特徴とする請求項1から9のいずれか1項に記載の発光装置。
- 上記蛍光体層を支持する透光性の基板をさらに備えていることを特徴とする請求項1から10のいずれか1項に記載の発光装置。
- 上記蛍光体層の蛍光の出射側の面の一部を覆い、上記励起光および蛍光を遮光する遮光部をさらに備えていることを特徴とする請求項1から11のいずれか1項に記載の発光装置。
- 上記蛍光体層の励起光照射面の一部を覆い、上記励起光および蛍光を遮光する遮光部をさらに備えており、
上記励起光配光制御部は、上記励起光照射面のうち、上記遮光部によって覆われていない部分に設けられていることを特徴とする請求項1から11のいずれか1項に記載の発光装置。 - 上記遮光部は、上記励起光および蛍光を反射する反射部であることを特徴とする請求項12または13に記載の発光装置。
- 上記遮光部は、上記励起光および蛍光を吸収する光吸収部であることを特徴とする請求項12または13に記載の発光装置。
- 上記蛍光体層に対して上記励起光が照射される面は、当該蛍光体層において上記蛍光が出射される面と対向していることを特徴とする請求項1から15のいずれか1項に記載の発光装置。
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WO2017043122A1 (ja) * | 2015-09-08 | 2017-03-16 | シャープ株式会社 | 波長変換部材および発光装置 |
WO2017207347A1 (en) * | 2016-06-03 | 2017-12-07 | Lumileds Holding B.V. | Light converting device |
WO2018083025A1 (en) * | 2016-11-07 | 2018-05-11 | Lumileds Holding B.V. | Light emission assembly with beam shaping structure |
JP6905070B2 (ja) | 2017-10-02 | 2021-07-21 | 京セラ株式会社 | 光源装置および照明装置 |
CN111051932B (zh) * | 2018-01-30 | 2022-03-22 | 松下知识产权经营株式会社 | 荧光体及其制造方法 |
JP6702349B2 (ja) * | 2018-03-27 | 2020-06-03 | 日亜化学工業株式会社 | 発光装置 |
JP7258505B2 (ja) * | 2018-10-10 | 2023-04-17 | スタンレー電気株式会社 | 光照射システム |
US11781737B2 (en) | 2018-11-26 | 2023-10-10 | Kyocera Corporation | Light source device and lighting device |
WO2020110962A1 (ja) | 2018-11-26 | 2020-06-04 | 京セラ株式会社 | 光源装置および照明装置 |
US11862758B2 (en) * | 2018-11-28 | 2024-01-02 | Lawrence Livermore National Security, Llc | Systems and methods for fluoride ceramic phosphors for LED lighting |
US11205886B2 (en) * | 2019-03-12 | 2021-12-21 | Nichia Corporation | Method of manufacturing optical member, optical member, and light emitting device |
JP2020160366A (ja) * | 2019-03-27 | 2020-10-01 | パナソニックIpマネジメント株式会社 | 波長変換素子及び照明装置 |
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