Exterior aircraft light unit and aircraft comprising the same

Exterior aircraft light unit, comprising:

• a mounting structure,
• an LED arranged on the mounting structure, and
• an optical system, arranged on the mounting structure for creating an output light emission distribution of the exterior aircraft light unit,
• wherein the optical system comprises, in a first cross-sectional plane extending through the LED:
• a first concave reflector and a second concave reflector, each of the first and second concave reflectors having a proximate end positioned adjacent to the mounting structure and a distal end positioned separated from the mounting structure, with the first and second concave reflectors being arranged on opposite sides of the LED in the first cross-sectional plane, and
• a refractive optical element arranged between the first and second concave reflectors in the first cross-sectional plane,
• wherein the distal ends of both the first and second concave reflectors have back-tapered shapes, with the first and second concave reflectors curving towards each other at their distal ends,
• wherein the LED, the first concave reflector and the second concave reflector are arranged in such a way that the light emitted by the LED and reflected by the first concave reflector in the first cross-sectional plane crosses the light emitted by the LED and reflected by the second concave reflector in the first cross-sectional plane.