A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMITTING DEVICE
The present invention provides: a light wavelength conversion member which is capable of enhancing the luminous intensity by enhancing the light extraction efficiency, while being able to suppress color unevenness; and a light emitting device. A light wavelength conversion member 9 according to the present invention is provided with a ceramic plate 11 which is configured from a polycrystalline body that is mainly composed of Al2O3and a component represented by A3B5O12:Ce; and each of A and B in A3B5O12represents at least one element selected from the element groups described below. In addition, a dielectric multilayer film 13 which transmits a specific wavelength and reflects another specific wavelength is formed on a light incident surface 11a of the ceramic plate 11. The ceramic plate 11 has a porosity of 2% by volume or less, while having an average surface roughness (an arithmetic mean roughness Sa) of 0.5 µm or less. A: Sc, Y and lanthanoids (excluding Ce) B: Al and Ga.
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMITTING DEVICE
The present invention provides: a light wavelength conversion member which is capable of enhancing the luminous intensity by enhancing the light extraction efficiency, while being able to suppress color unevenness; and a light emitting device. A light wavelength conversion member 9 according to the present invention is provided with a ceramic plate 11 which is configured from a polycrystalline body that is mainly composed of Al2O3and a component represented by A3B5O12:Ce; and each of A and B in A3B5O12represents at least one element selected from the element groups described below. In addition, a dielectric multilayer film 13 which transmits a specific wavelength and reflects another specific wavelength is formed on a light incident surface 11a of the ceramic plate 11. The ceramic plate 11 has a porosity of 2% by volume or less, while having an average surface roughness (an arithmetic mean roughness Sa) of 0.5 µm or less. A: Sc, Y and lanthanoids (excluding Ce) B: Al and Ga.
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMITTING DEVICE
LICHTWELLENLÄNGENUMWANDLUNGSELEMENT UND LICHTEMITTIERENDE VORRICHTUNG
ÉLÉMENT DE CONVERSION DE LONGUEUR D'ONDE DE LUMIÈRE ET DISPOSITIF D'ÉMISSION LUMINEUSE
ITO TSUNEYUKI (author) / KATSU YUSUKE (author) / TAKAKU SHOHEI (author)
2021-02-17
Patent
Electronic Resource
English
IPC:
G02B
Optische Elemente, Systeme oder Geräte
,
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
/
C04B
Kalk
,
LIME
/
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
/
H01L
Halbleiterbauelemente
,
SEMICONDUCTOR DEVICES
/
H01S
Vorrichtungen, die stimulierte Emission verwenden
,
DEVICES USING STIMULATED EMISSION
| European Patent Office | 2021
| European Patent Office | 2020
LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT-EMITTING DEVICE
| European Patent Office | 2020
| European Patent Office | 2018
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