Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Heisser Strahler

Hot emitter, especially as a 'grey body' for IR energy supply to photocells, has a microstructured metal surface to produce optical resonance in a certain emission wavelength region.
 
: Wittwer, V.; Gombert, A.; Heinzel, A.; Boerner, V.; Graf, W.

:
Frontpage ()

DE 1998-19845423 A: 19981002
DE 1998-19845423 A: 19981002
WO 1999-EP7266 A: 19991001
DE 19845423 A1: 20000413
H01K0001
H05B0003
German
Patent, Electronic Publication
Fraunhofer ISE ()

Abstract
Beschrieben wird ein heisser Strahler mit wenigstens einer Metalloberflaeche, die elektromagnetische Strahlung wenigstens mit Wellenlaengen im sichtbaren und infraroten Spektralbereich emittiert. Die Erfindung zeichnet sich dadurch aus, dass die Metalloberflaeche eine Mikrostruktur mit Erhoehungen und Vertiefungen aufweist, deren Strukturform und -tiefe derart gewaehlt ist, dass in wenigstens einem bestimmten Wellenlaengenbereich der emittierten Strahlung optische Resonanzen innerhalb der Struktur auftreten.

 

DE 19845423 A UPAB: 20000531 NOVELTY - A hot emitter, having a metallic surface with a microstructure of peaks and troughs for producing optical resonance in a certain emission wavelength region, is new. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for production of the above hot emitter by coating of its smooth metallic surface with a photoresist lacquer, double holographic exposure of the lacquer with intermediate rotation of the metallic surface, development of the exposed lacquer and transfer of the exposed microstructure into the metallic surface by etching. Preferred Features: The metallic surface consists of tungsten. USE - For emitting electromagnetic radiation in the visible and IR spectral regions, especially as a 'grey body' used in thermophotovoltaic applications for supplying IR energy to photocells for conversion into electrical energy. ADVANTAGE - The microstructure provides selective emission properties for improved matching of the spectral region of the emitted radiation with the spectral sensitivity of photocells, so that undesired heating of the photocells is avoided. Additionally, the emitter has a greater long term stability than prior art emitters of rare earth oxides.

: http://publica.fraunhofer.de/documents/PX-63478.html