Abstract: A lighting device is provided that allows a reduced color separation. The lighting device is configured to emit light along an output direction. The lighting device comprises a base, two or more light emitting diode, LED, chips and a light transmissive dielectric material. The two or more LED chips are asymmetrically distributed on the base and are configured to emit light in the output direction. The light transmissive dielectric material may be embedding the two or more chips and includes luminescent material. A first chip of the one or more LED chips is arranged so that one corner of the first chip coincides, or at least closely, coincides with a central axis of the lighting device.

Abstract: A solid state light emitter lighting assembly (100) and a luminaire are provided. The solid state light emitter assembly comprises a light exit window (110), a reflector (120?, 120?), a light guide (150?, 150?) and a solid state light emitter (160). The reflector reflect light towards the light exit window and has at least one edge (122?, 122?) bending towards the light exit window. The light guide receives light at a first end (152) and emits at a second end (154?, 15?) the guided light towards the reflector. The first end is arranged at a first side of the at least one edge. The first side is away from a reflecting surface (124) of the reflector. The solid state light emitter is also at the first side and emits light towards the first end of the light guide. A portion of the light that is reflected by the reflector is transmitted through the light guide through side surfaces of the light guide.

Abstract: An optical system for collimation of incoming light, comprising: a body (102); a recess (110) formed on a first side (104) of the body (102), the recess (110) having a central light entry surface (114) and a side light entry surface (112); a central light exit surface (118) provided at a second side of the body (108), which second side (108) is opposite to said first side (104); said central light entry surface (114) being arranged in relation to the central light exit surface (118) such that incoming light falling on the central light entry surface (114) is directed to the central light exit surface (118), a total internal reflection surface (116) provided at a side surface of the body (102), which is arranged such that incoming light falling on the side light entry surface (112) of the recess (110) is directed towards the total internal reflection surface (116) so as to be subject to total internal reflection towards the second side (108) of the body (102); and a rejection area (120) surrounding said centra

Abstract: An optical device that allows the usage of an extended light source in a more compact device is provided. The optical device may be configured to collimate light of a light source (270) along an optical direction. The optical device (200) may comprise a source surface (215), a forward surface (210), a lens body (250) and a peripheral element (240). The source surface is arranged to receive light and may comprise a central portion (220) and a Fresnel portion (230). The Fresnel portion includes at least one tooth (233n) for deflecting light. The forward surface is arranged to output, along the optical direction, at least the deflected light into a collimated light. The source surface and the forward surface delimit the lens body. The peripheral element may be arranged to reflect light internally reflected at the forward surface by total inner reflection towards the optical direction to contribute to the collimated light.

Abstract: The invention provides various designs for enabling a non-circular area of collimated light output or to enable tessellation of collimators. In a first aspect, a collimator arrangement comprises a plurality of collimators, each having a circular general outer shape with one or more indentation into the circular general outer shape, wherein each indentation comprises a pair of edges which meet at an internal angle and each indentation defines a pair of external angles where the cut-out meets the general outer shape. The collimators are tessellated with each internal angle adjacent one of the external angles of an adjacent collimator. In another aspect, a collimating optical structure comprises a first section comprising one or more portions of a first collimator lens design with a first diameter and a second section comprising one or more portions of a second collimator lens design with a larger, second diameter.

Abstract: The present disclosure relates to a color tunable lighting device comprising at least one light source (302), a symmetry axis (306) and an envelope (304). The at least one light source (302) is disposed on a base (301) extending within a plane and the envelope (304) is disposed at least above the base (301) and defines a cavity (305) extending along the symmetry axis (306). The at least one light source (302) is arranged at a distance X from the symmetry axis (306) along a radial direction relative to the symmetry axis. The plane is arranged to intersect the symmetry axis (306). The distance X may be at least 50% of a total distance between the symmetry axis (306) and an edge of the envelope (304), or a projection of the edge of the envelope (304) on the plane in which the base (301) extends, as seen along the radial direction. A curvature of the envelope (304) is monotonically increasing with an increasing distance from the base (301).

Abstract: An optical device (100) is disclosed, comprising a collimator (110) and a first lenslet array (130, 430) and a second lenslet array (140, 440). The first lenslet array and the second lenslet array are provided with the same tessellation pattern, aligned with each other and arranged such that a projection (150) of a light source (122) is focused on the second lenslet array, which is configured to emit non-focused light. At least some of the lenslets of the second array are formed such that a ratio of their sagittal and meridional dimensions varies at least along the meridional direction (M) of the second lenslet array, based on the varying shape of the projection of the light source as seen by said lenslets, so as to achieve an improved mixing, intensity and uniformity of light emitted from the optical device.

Abstract: An optical system for producing uniform illumination on a target, comprising a lens body (204), a recess (202) formed on a bottom side of the lens body (204) at a central region thereof accommodating a light source arranged in an integration zone (206), the recess (202) having a side entry surface (208) and a central entry surface (210), a total internal reflection surface (212) provided at a side surface of the lens body (204), wherein the total internal reflection surface (212) comprises a plurality of first lenslets (216); and an exit surface (214) provided at a top side of the lens body (204), the exit surface (314) comprising a plurality of second lenslets (218), wherein each of the first lenslets (216) forms a pair (220) with each of the second lenslets (218), wherein the first lenslet (216) of the pair (220) focuses light from the integration zone (206) upon the second lenslet (218) of the pair (220), and wherein the second lenslet (218) of the pair (220) focuses the target upon the first lenslet (216)

Abstract: A lighting unit (10) configured to illuminate a surface (32) having a proximal portion (34) and a distal portion (36) in relation to the lighting unit. The lighting unit includes a light source (12) configured to emit a light beam (28), and an optic (40) positioned between the light source and the surface to modify the emitted light beam to have a largely uniform vertical illumination distribution along the surface. The input surface (39) of the optic faces the light source and has a convex lens portion (41) that directs a portion of the emitted light beam at the distal portion of the surface, and a concave lens portion (43) that directs a portion of the emitted light beam at the proximal portion of the surface.

Abstract: The invention provides various designs for enabling a non-circular area of collimated light output or to enable tessellation of collimators. In a first aspect, a collimator arrangement comprises a plurality of collimators, each having a circular general outer shape with one or more indentation into the circular general outer shape, wherein each indentation comprises a pair of edges which meet at an internal angle and each indentation defines a pair of external angles where the cut-out meets the general outer shape. The collimators are tessellated with each internal angle adjacent one of the external angles of an adjacent collimator. In another aspect, a collimating optical structure comprises a first section comprising one or more portions of a first collimator lens design with a first diameter and a second section comprising one or more portions of a second collimator lens design with a larger, second diameter.

Abstract: A light funnel collimator has a central lens surface and a back reflecting surface, shaped to provide a wider background beam and a narrower hotspot beam within but off-center of the wider beam. One of the beams is on-axis of the collimator, and the other beam is off-axis. The reflector is at least partly asymmetrical relative to the axis, and provides or contributes to the off-axis beam.

Abstract: A lighting unit (10) configured to illuminate a surface (32) having a proximal portion (34) and a distal portion (36) in relation to the lighting unit. The lighting unit includes a light source (12) configured to emit a light beam (28), and an optic (40) positioned between the light source and the surface to modify the emitted light beam to have a largely uniform vertical illumination distribution along the surface. The input surface (39) of the optic faces the light source and has a convex lens portion (41) that directs a portion of the emitted light beam at the distal portion of the surface, and a concave lens portion (43) that directs a portion of the emitted light beam at the proximal portion of the surface.

Abstract: An optical device that allows the usage of an extended light source in a more compact device is provided. The optical device may be configured to collimate light of a light source (270) along an optical direction. The optical device (200) may comprise a source surface (215), a forward surface (210), a lens body (250) and a peripheral element (240). The source surface is arranged to receive light and may comprise a central portion (220) and a Fresnel portion (230). The Fresnel portion includes at least one tooth (233n) for deflecting light. The forward surface is arranged to output, along the optical direction, at least the deflected light into a collimated light. The source surface and the forward surface delimit the lens body. The peripheral element may be arranged to reflect light internally reflected at the forward surface by total inner reflection towards the optical direction to contribute to the collimated light.

Abstract: A lighting device is provided that allows a reduced color separation. The lighting device is configured to emit light along an output direction. The lighting device comprises a base, two or more light emitting diode, LED, chips and a light transmissive dielectric material. The two or more LED chips are asymmetrically distributed on the base and are configured to emit light in the output direction. The light transmissive dielectric material may be embedding the two or more chips and includes luminescent material. A first chip of the one or more LED chips is arranged so that one corner of the first chip coincides, or at least closely, coincides with a central axis of the lighting device.

Abstract: A lighting device (100) comprising a collimator (112) having an entrance aperture and an exit aperture (302), a crossed beam splitter (106, 206) and at least four lighting units. Each of the lighting units comprises a light source (102) and a focusing element (104) having an entrance aperture (308) arranged to receive light from the light source (102) and an exit aperture (304). The focusing element (104) is configured to focus light towards the beam splitter (106, 206), and the crossed beam splitter is arranged to receive light from each of the lighting units and configured to split the light from each light source into four beams. Further, the beam splitter (106, 206) is arranged and configured such that said four beams are directed towards the entrance aperture of the collimator (112). The collimator (112) is configured to interact with said beams to provide four images, each image comprising one fourth of the light from each lighting unit.

Abstract: A light funnel collimator has a central lens surface and a back reflecting surface, shaped to provide a wider background beam and a narrower hotspot beam within but off-center of the wider beam. One of the beams is on-axis of the collimator, and the other beam is off-axis. The reflector is at least partly asymmetrical relative to the axis, and provides or contributes to the off-axis beam.

Abstract: A collimator (3) for a color over position light source (2) is provided. The collimator (3) comprises a focal point (F), an optical axis (OA) containing the focal point (F), an imaging element (4) arranged around or on the optical axis (OA) and several light spreading elements (5, 11, 12) ranged around the optical axis (OA) to receive at least one image from the imaging element (4). The light spreading elements (5, 11, 12) have different light beam widening characteristics, the light beam widening characteristics of each light spreading element (5, 11, 12) of said light spreading elements (5, 11, 12) depending on the position of the light spreading element (5, 11, 12) relative to the focal point (F). The light spreading elements (5, 11, 12) are adapted to spread light striking the light spreading elements (5, 11,12) in a first plane (M) including the optical axis (OA). A method for collimating light from a color over position light source (2) is also provided.

Abstract: An optical device (100) is disclosed, comprising a collimator (110) and a first lenslet array (130, 430) and a second lenslet array (140, 440). The first lenslet array and the second lenslet array are provided with the same tessellation pattern, aligned with each other and arranged such that a projection (150) of a light source (122) is focused on the second lenslet array, which is configured to emit non-focused light. At least some of the lenslets of the second array are formed such that a ratio of their sagittal and meridional dimensions varies at least along the meridional direction (M) of the second lenslet array, based on the varying shape of the projection of the light source as seen by said lenslets, so as to achieve an improved mixing, intensity and uniformity of light emitted from the optical device.

Abstract: According to an embodiment of the present inventive concept there is provided an arrangement 4 comprising: an optical device 8 including a radially inner beam forming portion 10 and a radially outer portion 12, at least partly enclosing the radially inner portion 10. The arrangement 4 further comprises a reflector 6 arranged to reflect, in a first direction towards the radially outer portion 12, light emitted by a light source 2 such that a first optical path is formed from the light source 2 to the radially outer portion 12, via the reflector 6. The radially outer portion 12 is transparent such that incident light reaching the radially outer portion 12 along the first optical path exits the radially outer portion 12 in a direction parallel to the first direction, and at least one of scattering and attenuating for light reaching the radially outer portion 12 along a second optical path extending directly between the light source 2 and the radially outer portion 12.

Abstract: A lighting device comprises a light source defining a central axis and comprising at least two mutually independently operable lighting elements. The lighting device further comprises a rotatable deflective member rotatably mounted about said axis, and a fixed deflective member fixedly mounted on said axis and comprising at least two mutually differently deflective portions which each are associated with a respective lighting element. The lighting device of the invention enables various operation modes, like light beam rotation can rotate, jumping of the light beam from one location to another by a sequence of switching on and off one or more of the at least two lighting elements, or in that it can be dimmed or boosted, for example dimmable in steps by a sequence of one by one switching off the lighting elements.