The disclosure concerns an infrared emitter is provided comprising a metalized membrane emitting infrared light in operation. The membrane comprises a two dimensional array of infrared wavelength sized through-holes and to each side a thin metal layer comprising also an array of through-holes. The through-holes are arranged as a two-dimensional periodic array and each of said through-holes have a cross section having a maximum and a minimum dimension of less than any wavelength of the emitted infrared light. The peak wavelength of the emitted infrared light is proportional to the periodicity of the through-holes. At least one of the metal layers is connected to an electrical current source that provides an electrical current that heats at least one of the metal layers so that a narrow bandwidth and highly directive light beam of infrared light is emitted. The membrane is arranged on a membrane support and both are made of a material that resists to temperatures higher than 400.

The disclosure concerns an infrared emitter is provided comprising a metalized membrane emitting infrared light in operation. The membrane comprises a two dimensional array of infrared wavelength sized through-holes and to each side a thin metal layer comprising also an array of through-holes. The through-holes are arranged as a two-dimensional periodic array and each of said through-holes have a cross section having a maximum and a minimum dimension of less than any wavelength of the emitted infrared light. The peak wavelength of the emitted infrared light is proportional to the periodicity of the through-holes. At least one of the metal layers is connected to an electrical current source that provides an electrical current that heats at least one of the metal layers so that a narrow bandwidth and highly directive light beam of infrared light is emitted. The membrane is arranged on a membrane support and both are made of a material that resists to temperatures higher than 400.

An IR emitter device includes an IR emitting membrane having a first surface and a second surface, and a mirror facing the first or second surface. The IR emitting membrane is arranged to be heated to an IR emission temperature so that the first and second surfaces radiate IR light at the IR emission temperature. The emissivity of the first and second surfaces is lower than 0.7. At least a portion of the IR emitting membrane includes through holes. Any cross section of said holes in a plane parallel to the first or second surface has a maximum dimension larger than the longest wavelength of the predefined region of the electromagnetic spectrum for which the IR emitter device has been designed. The sum of the areas of the holes is at least 10% of the area of each of the first or second surfaces.

A filament for a light bulb includes a tube and a filament material within the tube, wherein the filament material is configured to be in a liquid state while the light bulb is in use.

An optical radiation source produced from a disordered semiconductor material, such as black silicon, is provided. The optical radiation source includes a semiconductor substrate, a disordered semiconductor structure etched in the semiconductor substrate and a heating element disposed proximal to the disordered semiconductor structure and configured to heat the disordered semiconductor structure to a temperature at which the disordered semiconductor structure emits thermal infrared radiation.

Embodiments of the present invention generally relate to a tubular lamp with a coiled filament having an overwind wrapped around the coil. In one embodiment, the tubular lamp has a coiled coil filament, and the coiled coil has an overwind wrapped around the coiled coil.

Embodiments of the present invention generally relate to a tubular lamp with a coiled filament having an overwind wrapped around the coil. In one embodiment, the tubular lamp has a coiled coil filament, and the coiled coil has an overwind wrapped around the coiled coil.

An infrared light source includes an emitting element extending as a radial plane about the emitting element's center and configured to heat up to emit infrared light. The emitting element lies in a cavity bounded by a cover, placed facing the emitting element. The cover has internal and external faces, the internal face facing the emitting element, and the external face defining an interface between the cover and a medium outside the light source. The cover occupies, parallel to a transverse axis perpendicular to the radial plane, a thickness, between the internal and external faces. The external face includes a planar central portion and at least one peripheral portion adjacent and inclined respective to the central portion. The planar central portion extends about the external face's center. In the peripheral portion, the cover's thickness decreases as a function of a distance from the central portion.

The invention provides a halogen lamp, including: a socket, a transparent shell, two conductive members, a spiral filament, two insulating rods and a supporting mechanism. The supporting mechanism includes a front and a rear supporting portion. Several front hooks of the front supporting portion are respectively connected between the spiral filament and a front supporting rod of the front supporting portion, several rear hooks of the rear supporting portion are respectively connected between the spiral filament and a rear supporting rod of the rear supporting portion, and the front supporting portion and the rear supporting portion are arranged in a symmetric pattern. Therefore, the spiral filament can be fixed by the supporting mechanism without easy deviating, thereby increasing the service life of the halogen lamp.

The invention provides a halogen lamp, including: a socket, a transparent shell, two conductive members, a spiral filament, two insulating rods and a supporting mechanism. The supporting mechanism includes a front and a rear supporting portion. Several front hooks of the front supporting portion are respectively connected between the spiral filament and a front supporting rod of the front supporting portion, several rear hooks of the rear supporting portion are respectively connected between the spiral filament and a rear supporting rod of the rear supporting portion, and the front supporting portion and the rear supporting portion are arranged in a symmetric pattern. Therefore, the spiral filament can be fixed by the supporting mechanism without easy deviating, thereby increasing the service life of the halogen lamp.