EIGHT-COLOUR RASTER OPTICAL LANDING SYSTEM Russian patent published in 2021 - IPC B64F1/18 

FIELD: aviation.

SUBSTANCE: invention relates to aviation and namely to systems of optical landing of an aircraft. An eight-color raster optical landing system includes landing prohibition lights, a light intensity control unit, an inertial motion sensor, a pitch and roll stabilization platform, a radio channel unit, a power supply unit as well as glide path spotlights of red, blue, yellow, violet light sectors and flare spotlights of the left and right red lights grouped in two color segments as well as a combination of two color horizons of red, blue, yellow and violet spotlights which are fixed in the gliding plane near the runway but outside it symmetrically relative to the heading plane and which form eight sectors of illumination around and along the glide path by means of color-foreslope projectors. Moreover, when an aircraft is flying exactly along the glide path or with permissible deviation from the glide path and within the central transparent zone, in the center of which the glide path passes, a pilot does not see the color segments, and as deviation increases outside the central transparent zone, the brightness of the corresponding color segments increases proportionally from zero at the border between the central transparent zone and the inner edge of the illumination sector to the maximum value and then remains constant until the outer edge of the illumination sector. At the same time, outside the central transparent zone, depending on the direction of deviation of an aircraft relative to the glide path, a pilot observes the lights of the left color segment and/or the right color segment in certain color combinations. After the end of the glide path, the space under the flare path and up to the runway surface is filled with red lighting sectors from the color-segment flare spotlights, which are directed perpendicular to the runway and which form a tilted light chute, the bottom of which coincides with the flare path. Moreover, the light chute is perceived by the pilot as lateral illumination from both sides or from one of the sides with certain deviations from the flare path. At the same time, the pilot observes the spotlights of the color horizons, which are located in the planning plane but behind the color segments or on the same straight line with them. The spotlights of the color horizons form the left color horizon to the left of the left color segment and the right color horizon to the right of the right color segment. Each of the color horizons consists of four spotlights with red, blue, yellow or violet light sources in the sequence listed from the runway. Moreover, the distance between the spotlights of each color horizon is calculated taking into account the angular resolution of human vision. The color horizons are normally switched on at the command of permission to land the aircraft. However, if the runway is urgently closed, for example, by the ground controller of the landing gear, all unified slide projectors of the color horizons transmit the code of the reason for closing the runway in Morse code. The system also includes a combination of an alignment kit for a unified slide projector and its control units, complemented by binoculars.

EFFECT: invention solves the problem of avionics-independent direct visual informing the pilot from the runway about the deviation of the aircraft from the glide path or the flare path.

10 cl, 14 dwg