An aircraft light unit (2), has a support portion (4), a light source having at least one LED (6), the light source being arranged on the support portion (4) and in operation emitting light with a source-side light intensity distribution, and an optical element (8) for transforming the source-side light intensity distribution into an output light intensity distribution. The optical element (8) has at least two transformation segments (10, 20, 30), covering different angular ranges of the source-side light intensity distribution in a first cross-sectional plane. The at least two transformation segments (10, 20, 30) include a first transformation segment (10), with the light from the light source experiencing total internal reflection within the optical element (8) in the first transformation segment (10) and being bundled in a peak region of the output light intensity distribution, and at least one further transformation segment (20, 30), with the light from the light source experiencing refraction only in the at least one further transformation segment (20, 30).

An electric power-generating system for a rotor blade includes at least one electromechanical power-converting device and at least one power-guide line, which is connected mechanically to the electromechanical power-converting device. The electromechanical power-converting device is configured in such a way that, during a movement of the power-guide line, the device converts into electric power the forces introduced by the movement of the power-guide line into the electromechanical power-converting device.

An exterior aircraft light includes a mounting board, having an upper side, a lower side and a plurality of side faces; at least one LED, arranged on the upper side of the mounting board; and a mounting board enclosure and lens structure, wherein the mounting board enclosure and lens structure comprises a lens arranged over the at least one LED for shaping an output light intensity distribution of the exterior aircraft light and a covering layer arranged on the upper side, the lower side and the plurality of side faces of the mounting board, wherein the mounting board enclosure and lens structure is an integral silicone structure.

A drone includes a light emitter that emits light and circuitry which, in operation, obtains flight state information regarding a flight state of the drone, determines, on the basis of the flight state information, a direction in which the light emitter is to emit light, and controls the light emitter such that the light emitter emits light in the determined direction.

There is a remote control device or drone, which has software and a combination of lights or LED on an lighting ring or apparatus that can move independently of the drone; the drone can be programmed or be reactive to sound or other stimulus to create the effect of writing shapes or words in the air and typically at nighttime against a dark sky.

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.

An exterior light unit, has an LED in operation emitting light; a reflector, which reflects a first portion of the light emitted by the LED; a first lens, through which the first portion of the light is refracted after being reflected by the reflector; and a second lens, which is an aspherical collimating lens and which is arranged in such a way with respect to the LED that a second portion of the light emitted by the LED has an unobstructed path to the second lens and is collimated by the second lens in a main light output plane. The second portion of the light, when on its way from the LED to the second lens, crosses way with the first portion of the light, when on its way from the reflector to the first lens.

A system for illuminating at least a portion of an object within an enclosed space includes an object configured to be moved within the enclosed space, and a beacon coupled to the object. The beacon is configured to emit a light tracking signal. A light sensor is configured to detect the light tracking signal emitted from the beacon. A lighting control unit in communication with the light sensor is configured to determine a position of the object within the enclosed space based on the light tracking signal as detected by the light sensor. A lighting assembly is in communication with the lighting control unit. The lighting control unit is configured to operate the lighting assembly to emit the illuminating light onto the at least a portion of the object based on the light tracking signal as detected by the light sensor. The system may also be configured to guide a passenger to a seat, and provide way-finding illumination.

A method can include generating reference image data representing a field of view of an interior of a fuel tank, and generating active image data representing the field of view of the interior of the fuel tank when the fuel tank contains fuel. The method can further include producing, by a processing device, a fuel measurement value representing an amount of fuel contained in the fuel tank based on the reference image data and the active image data, and outputting, by the processing device, an indication of the fuel measurement value.

The present disclosure is generally directed to an interior lighting system for an aircraft, in which individual lighting elements (or groups of lighting elements) can be controlled to emit light of various colors and brightness according to the position of a cart, such as a galley cart. According to an embodiment, a processor that controls the system receives signals from one or more sensors around the aircraft cabin (e.g., radio frequency identification (“RFID”) readers or optical scanners) that indicate the current position of the cart (e.g., by detecting an RFID tag on the cart) and, based on the position of the cart, sends commands to the various lighting elements around the cabin to execute a lighting scene (e.g., gradually raise the lights as the cart comes through).