Three-dimensional tungsten structure for an incandescent lamp and light source comprising said structure
First Claim
1. Three-dimensional tungsten structure, in particular a filament, for an incandescent lamp, characterized in that it comprises a plurality of tungsten microfilaments (6A) with micrometric and/or nanometric dimensions, preferably with a circular or quadrangular section, disposed in the space to form a photonic crystal structure.
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Abstract
A three-dimensional structure in the form of filament (6) for an incandescent lamp comprises a plurality of tungsten microfilaments (6A) having micrometric and/or nanometric dimensions, to form a photonic crystal structure. The microfilaments (6A) are arranged so as to form a series of microcavities in the three-dimensional structure (6), a means having a refraction index different from that of tungsten being present within said microcavities. The described arrangement makes it possible to prevent propagation and spontaneous emission of IR radiation of specific wavelenghts e allows at the same time propagation and spontaneous emission of visible radiation.
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Citations
15 Claims
- 1. Three-dimensional tungsten structure, in particular a filament, for an incandescent lamp, characterized in that it comprises a plurality of tungsten microfilaments (6A) with micrometric and/or nanometric dimensions, preferably with a circular or quadrangular section, disposed in the space to form a photonic crystal structure.
- 12. Light source, in particular an incandescent lamp, comprising a bulb (2) inside which a three-dimensional tungsten structure (6A) is disposed, in particular a filament, characterized in that said structure (6A) is in the form of photonic crystal, that is defining a series of microcavities in which there is a means with a different refraction index to the tungsten.
Specification