LIGHT ABSORBER

PURPOSE: To obtain a light absorber having a high extinction coefft. CONSTITUTION: This light absorber 3 is made of an aggregate of metallic crystals. The areal fraction of pyramidal metallic crystals 6, 7 in the light receiving surface 4 is 40-100%. The pyramidal metallic crystals 6, 7 are uniforml...

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Bibliographische Detailangaben
Hauptverfasser:	TOYODA YUSUKE, HINUMA HIROSHI, TABATA KATSUMUNE, GUNJI TAKAHIRO, DOUSAKA KENJI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CRYSTAL GROWTH CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH SOLDERING OR UNSOLDERING TRANSPORTING UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE: To obtain a light absorber having a high extinction coefft. CONSTITUTION: This light absorber 3 is made of an aggregate of metallic crystals. The areal fraction of pyramidal metallic crystals 6, 7 in the light receiving surface 4 is 40-100%. The pyramidal metallic crystals 6, 7 are uniformly dispersed over the entire light receiving surface 4 and many valleys 8 can be formed by the adjacent pyramidal metallic crystals 6, 7. The ratio (d/λ) of the average grain diameter (d) of the crystals 6, 7 to the wavelength (λ) of light L radiated on the light receiving surface 4 is >=0.73. The depth of the valleys 8 is increased in accordance with the increase in the diameter (d), and since the depth of the valleys 8 is properly set to the light L having wavelength λ, the probability of appearance of the light L from the valleys 8 is considerably reduced.