FIELD: optical aids for aircraft landing.
SUBSTANCE: proposed lighting fixture includes lamp unit emitting light in preset directions within preset angles of radiation forming angle α relative to axis which is perpendicular to flat surface. Each lamp unit is provided with light-refracting unit of longitudinal direction which is matched with direction of light, inlet surface which is perpendicular to direction of light and outlet surface which is parallel to flat surface. Light-refracting unit is secured by means of support located along entire length of light-refracting unit and made in form of prismatic diffraction grating which consists of glass plates, preferably from borosilicate glass and metal foil laid in between adjacent plates. Angle α lies within 41-43°, preferably 42°.
EFFECT: universality of application; enhanced reliability of aircraft landing.
7 cl, 3 dwg
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