Techniques disclosed herein relate to micro light emitting diodes (micro-LEDs) for a display system. A display system includes an array of micro light emitting diodes (micro-LEDs), an array of output couplers optically coupled to the array of micro-LEDs and configured to extract light emitted by respective micro-LEDs in the array of micro-LEDs, a waveguide display, and display optics configured to couple the light emitted by the array of micro-LEDs and extracted by the array of output couplers into the waveguide display. Each output coupler in the array of output couplers is configured to direct a chief ray of the light emitted by a respective micro-LED in the array of micro-LEDs to a different respective direction.

A lighting lens for a biometric measurement device comprises a paraboloidal or ellipsoidal reflector with symmetry of revolution, and a dioptric surface that has two different refractive power values in two perpendicular directions, said two refractive power values being negative or zero. Such a lens can be produced in the form of a block of transparent material and be used in a biometric measurement device. In particular, it makes it possible to capture skin prints as an image with an exposure time that is short.

A projector includes a light source unit group having light source units arranged in matrix, a mirror group arranged in a traveling direction of light beams emitted from the unit group, the mirror group including reflective mirrors that reflect, with reflective parts, the beams emitted from the unit group while each of the reflective mirrors narrows interval between the beams in a first direction, the mirrors being arranged stepwise so as to narrow interval between the beams in a second direction, and a cylindrical lens arranged in traveling directions of beams reflected by the mirrors, the lens causing the reflected beams reflected by the mirrors and traveling in the traveling directions different from each other to be parallel, the reflective parts being arranged to be bent in steps in the second direction so that the beams to be reflected in the second direction are close to each other.

A lighting device includes a light source including at least two light-emitting diode chips which emit light of mutually differing colors when in operation, and an optical element in the form of a solid body made from a dielectric material including a radiation entrance face facing towards the light-emitting diode chips, a radiation exit face remote from the light-emitting diode chips, and a circumferential face connecting the radiation entrance face and the radiation exit face to one another, wherein the circumferential face is reflective to the light emitted by the light-emitting diode chips when in operation, and the radiation entrance face and/or the radiation exit face is/are non-planar at least in places, wherein a gap, which is filled with a gas, is arranged between at least one of the light-emitting diode chips of the light source and the radiation entrance face, and the optical element is a sole optical element of the lighting device, which optical element is arranged downstream of all light-emitting diode chips of the light source.

A cover for a light source for use in a lamp or luminaire. An outer surface of the cover, opposite the light source, comprises a rounded shape and includes a protrusion extending from the cover. The protrusion extends substantially in a light emission direction and is shaped the protrusion to direct light emitted from the light source in a desired direction.

Lighting devices and methods for providing daylight to the interior of a structure are disclosed. Some embodiments disclosed herein provide a daylighting device including a tube having a sidewall with a reflective interior surface, a light collecting structure, and a light reflector positioned to reflect daylight into the light collector. In some embodiments, the light collector is associated with one or more light-turning and/or light reflecting structures configured to increase the amount of light captured by the daylighting device. Optical elements may allow for the absorption and/or selective transmission of infrared light away from an interior of the daylighting device.

Disclosed is a lighting device (1) including a lens (200, 300) comprising an annular collimating structure (100) having a central axis of symmetry (202), said structure comprising a light exit surface (105) and an intermediate region (120) in between an inner region (110) proximal to said axis and an outer region (130) distal to said axis, wherein one of the inner region and outer region consists of a single prism (112) extending from the light exit surface by a first height (h1) and the other of the inner region and outer region comprises a plurality of prisms (132) extending from the light exit surface by a maximum second height (h2), wherein the first height is at least the maximum second height and the intermediate region has an intermediate region surface (120′) separated from the light exit surface by a maximum further height (h3) that is smaller than the first height; and a plurality of solid state lighting elements (20) arranged in a circular pattern on a carrier surface (25) such that the solid state lighting elements are aligned with and facing the intermediate region surface (120′); and wherein the annular collimating structure is made of a material having a refractive index such that the first region is a refractive region and the single prism and the plurality of prisms each reflect light emitted by the solid state lighting elements towards the light exit surface. A luminaire including such a lighting device is also disclosed.

A daylighting device of the present invention is provided with a planar optical member 1 and a support member. The planar optical member 1 is provided with a planar structure body which has a plurality of linear bodies 3 formed of optically transparent materials which are arrayed substantially in parallel and a plurality of binding members which are arranged in a direction which intersects with the plurality of the linear bodies 3 and which bind the plurality of the linear bodies 3 in a state of being arrayed substantially in parallel. The linear bodies 3 have reflective surfaces which reflect light which is incident to the linear body 3 along a direction which intersects with a length direction of the linear body 3 and refractive surfaces which refract the light. In at least a part of a planar structure body, the orientations of reflective surfaces of at least some of the linear bodies out of the plurality of linear bodies 3 substantially match and the orientations of the refractive surfaces of at least some of the linear bodies substantially match.

An optic assembly for a light emitting diode mounted to a printed circuit board has a primary lens defined by a primary lens anterior surface and an opposed primary lens rear taper with a tip facing the light emitting diode. A secondary lens with a secondary lens anterior surface and an opposed secondary lens posterior surface faces the printed circuit board. The secondary lens defines a central cavity with the primary lens being disposed therein.

An optical lens, a backlight module and a display device are provided. The optical lens includes a main body, a light-incident surface, a reflecting surface and a light-emitting surface. The main body has a top portion and a bottom portion. The light-incident surface is recessed into the bottom portion of the main body. The reflecting surface is recessed into the top portion of the main body and opposite to the light-incident surface. The light-emitting surface connects the top portion and the bottom portion, in which the light-emitting surface has plural microstructures. Each of the microstructures has a normal line, and directions of the normal lines are different from each other.