A lighting device includes an elongated support member, first and second printed circuit boards, at least one first LED, at least one second LED and at least one lens element. The elongated support member includes first and second sides, the first and second PCBs coupled to the first and second sides of the elongated support member, respectively, the at least one first LED mounted on the first PCB and the at least one second LED mounted on the second PCB, each lens element includes at least one lens, the lens element mounted on the PCB at a location such that each lens substantially surrounds a respective one of the LEDs.

An optical device includes a center section having a lens portion for modifying distribution of a first part of light emitted by a light source, and a peripheral section surrounding the center section and including a conical surface for modifying distribution of a second part of the light emitted by the light source. The conical surface includes ridges where total internal reflection takes place when a light beam arrives from the light source at one of side surfaces of each ridge, and surface penetration takes place when the reflected light beam arrives at the other side surface of the ridge under consideration. Thus, the conical surface acts both as a reflective surface and as a refractive surface for achieving a desired light distribution pattern.

A lighting device including: a source emitting a light cone; an electronic control circuit; a wall defining an enclosure including a first area through which the light cone passes, and a second area complementary to the first area; and a diffuser directing part of the light by backscattering towards the second area. The diffuser includes a first part oriented perpendicular to the axis of revolution of the light cone and forming a first divergent lens, and a second part forming a second divergent lens having a shape of a flared truncated cone with its axis of revolution parallel to the axis of revolution of the light cone, in which a larger diameter end is closest to the light source and a smaller diameter end is adjacent to the first part and surrounds the first part.

Examples of the present disclosure disclose an LED light distribution structure, a light source module and a lamp. The LED light distribution structure includes a ring-shaped light distribution element and a plurality of LED chips; the ring-shaped light distribution element is provided with a light source cavity in a ring shape, and the light source cavity has a ring center and a center line surrounding the ring center in a ring shape; the plurality of LED chips are arranged in a ring shape in the light source cavity, each of the LED chips includes an LED and a chip substrate, and the LED is on the chip substrate; and LEDs on all the LED chips are uniformly arranged along a ring-shaped wiring line, the ring-shaped wiring line is in a concentric ring with the center line, and the ring-shaped wiring line is located inside or outside of the center line.

Various embodiments relate to a lighting device with an optoelectronic light source, an optical body downstream thereof for distributing the light, and a diffuser downstream of the latter, onto the light entry surface of which the light emitted by the optical body falls and the light exit surface of which represents a light emission surface of the lighting device. To homogenize the luminous intensity on the light exit surface, in addition to distributing the light with the optical body, the diffuser is not provided to be uniformly scattering to such an extent that light falling thereon in a central region is scattered more intensely than light falling thereon in an edge region.

An aircraft beacon device of a wind power installation, to be arranged on a gondola of the wind power installation, comprising at least three omnidirectional emission sections arranged concentrically in a ring around a common mid-axis, each omnidirectional emission section comprising a lens section arranged concentrically in a ring around the mid-axis, with a beam plane defined perpendicularly to the mid-axis, and at least one lighting ring having lighting means arranged concentrically in a ring around the mid-axis in order to emit light through the lens section, wherein each lighting ring is configured in order to emit light with a central emission direction which makes an emission angle with the beam plane, and wherein the emission direction depends on an axial position of the lighting ring with respect to the lens section, wherein at least one omnidirectional emission section comprises at least two lighting rings offset axially with respect to one another for emission with different emission angles.

A light configured to be coupled to a surface, where the light includes a light source configured to emit light in three dimensions and a lens configured to direct a majority of the light emitted by the light source outwardly from the light source in directions along the surface. The light may be an anti collision light for an aircraft.

A light flux controlling member for controlling a distribution of light emitted from a light-emitting element includes an incidence surface configured to allow the light to enter the light flux controlling member; an emission surface configured to emit light; and a reflection part including an inclined surface configured to reflect light entered from the incidence surface, wherein in a cross-section, a region where light emitted from a light emission center of the light-emitting element that is entered from the incidence surface and sequentially reflected by the emission surface and the inclined surface reaches in the emission surface includes a portion where a derivative value of a gradient of a tangent to a given point in the emission surface is 0, or a portion where a sign of the derivative value reverses.

An optical lens is provided. The optical lens may include a bottom surface, a concave recess provided in a center region of the bottom surface, a first light exit surface having a convexly curved surface on a side opposite to the bottom surface and the recess, and a second light exit surface between the bottom surface and the first light exit surface. A length in a first axis direction on the bottom surface is D1, and a length in a second axis direction perpendicular to the first axis direction is D2, a length in the first axis direction on the bottom of the recess is D3, and a length in the second axis direction on the bottom of the recess is D4, where a length of the bottom surface may have a relationship of D1<D2, and a bottom length of the recess may have a relationship of D3>D4.

An aircraft anti-collision light includes a first group of light sources arranged in a first annular configuration around an axis (A) and a second group of light sources arranged in a second annular configuration. The first group of light sources is surrounded by the second group of light sources. The light also has a first lens structure, which is configured for generating a first light output from light emitted by the first group of light sources, a second lens structure, which is configured for generating a second light output from light emitted by the second group of light sources, and a light transmissive cover, which is arranged over the first lens structure and the second lens structure and which passes the first light output and the second light output for emitting a total light output.