Optical converter

It is an object of the invention to provide an optical converter which has both a stable colour even at highest luminous powers and a high luminous efficiency. This object is solved by an optical converter (1) comprising a ceramic element (3), the ceramic element (3) being fluorescent so that light...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ROZENBURG, KEITH, LETZ, MARTIN, SEIDL, ALBRECHT, STOEHR, ULRIKE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DYES ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY LIME, MAGNESIA MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES REFRACTORIES SEMICONDUCTOR DEVICES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	It is an object of the invention to provide an optical converter which has both a stable colour even at highest luminous powers and a high luminous efficiency. This object is solved by an optical converter (1) comprising a ceramic element (3), the ceramic element (3) being fluorescent so that light of a first wavelength is absorbed in the ceramic element (3) and fluorescent having longer wavelength light is emitted, the ceramic element comprising pores (5), the pores (5) being spatially irregularly distributed within the ceramic element (3), the distribution of the pores (5) within the ceramic element (1) being inhomogeneous so that the radial distribution function of the pore locations deviates from unity and has a maximum at a characteristic distance (7), the maximum having a value of at least 1.2.