Abstract: A rectifying arrangement for an LED driver comprising a rectifying circuit and a clamping arrangement provides a low-impedance path between input terminals of the rectifying circuit in response to an abnormal operation of the rectifying arrangement, such as an open circuit of one rectifying branch of the rectifying arrangement. The low-impedance path is maintained for a plurality of cycles of an AC power supply provided to the rectifying circuit, and can be maintained on a (semi-)permanent basis.

Abstract: There is provided a luminaire (1) and a collimating optics (2) for LED lights (5). The collimating optics (2) comprises a reflection collimator (3) having a first aperture (7) for allowing incoming light from a LED light (5) to enter the collimator (3) and a second aperture (9) for allowing outgoing light to exit the collimator (3). The reflection collimator (3) further has a wall (15) with a reflective inner surface for guiding the incoming light from the first aperture (7) towards the second aperture (9). A first convex lens (11) is arranged at a distance from the first aperture (7) for refracting the incoming light, and a second convex lens (13) is arranged at the second aperture (9) for refracting and collimating the outgoing light. With the disclosed collimating optics the collimating capability is improved without the size of the optics being increased.

Abstract: The invention relates to a lighting device comprising: an optical reflector (200, 500) which has an interior surface (201); and a light source (205, 505); wherein the interior surface has a plurality of facets (203) that form a Fresnel structure-like reflecting surface (202), and the interior surface may further have a cone (504) so as to avoid light from the light source being reflected back to the light source; wherein at least part of the light from the light resource is reflected by the optical reflector into an output direction. The invention also relates to a luminaire which comprises the lighting device according to the invention. The invention further relates to a method of manufacturing an optical reflector for a spot lighting lamp. The method comprises forming (S01) a bowl-like structure that has an opening for emitting light and that has a Fresnel structure on the interior surface of the bowl-like structure.

Abstract: The invention relates to a lighting device comprising: an optical reflector (200, 500) which has an interior surface (201); and a light source (205, 505); wherein the interior surface has a plurality of facets (203) that form a Fresnel structure-like reflecting surface (202), and the interior surface may further have a cone (504) so as to avoid light from the light source being reflected back to the light source; wherein at least part of the light from the light resource is reflected by the optical reflector into an output direction. The invention also relates to a luminaire which comprises the lighting device according to the invention. The invention further relates to a method of manufacturing an optical reflector for a spot lighting lamp. The method comprises forming (S01) a bowl-like structure that has an opening for emitting light and that has a Fresnel structure on the interior surface of the bowl-like structure.

Abstract: There is provided a luminaire (1) and a collimating optics (2) for LED lights (5). The collimating optics (2) comprises a reflection collimator (3) having a first aperture (7) for allowing incoming light from a LED light (5) to enter the collimator (3) and a second aperture (9) for allowing outgoing light to exit the collimator (3). The reflection collimator (3) further has a wall (15) with a reflective inner surface for guiding the incoming light from the first aperture (7) towards the second aperture (9). A first convex lens (11) is arranged at a distance from the first aperture (7) for refracting the incoming light, and a second convex lens (13) is arranged at the second aperture (9) for refracting and collimating the outgoing light. With the disclosed collimating optics the collimating capability is improved without the size of the optics being increased.