Vehicle guidance system including means for projecting a beam of light to guide a vehicle such as an aircraft, and means for pulse coding the normally lower and upper portions of the beam whereby pulse coded signals are encountered by the aircraft following the beam on any departure into the pulse coded portions. The lower and upper pulse coded portions of the beam are differentiated by frequency and/or color coding. The duration of the pulses is also preferably varied in accordance with the degree of aircraft departure into the pulse coded portions of the beam.
A system is described in which a plurality of energy sources sequentially project segments of a directional code to a predetermined sector of space. An observer within the sector determines the angle between a reference direction and his line of sight to the system by noting the sequence and timing of the energy pulses he receives as successive segments are projected.
A vehicle guidance system including means for projecting a beam of light to guide a vehicle such as an aircraft on a glide slope, and means for pulse coding the upper the lower portions of the beam providing to the aircraft pilot an indication of the aircraft's position in relation to the glide slope. The upper and lower pulse coded portions of the beam are differentiated by color. Color coded pulses are also provided to differentiate this beam from other lights in the area of the runway.
An indicator light for a motor vehicle includes a divider screen adapted to divide a light beam into a plurality of elementary light beams which are then added together downstream of the dividing screen. A first coloring means, for coloring some of the elementary light beams, is located at a distance from the divider screen. The light unit includes a second coloring means adapted to color at least some of the elementary light beams, the second coloring means being spaced away from the divider screen and the first coloring means.
Disclosed is a glide path lighting system which is provided with a lens, a light source, and a screen whether or not constructed as a color filter disposed in the focal plane of the lens between the lens and the light source. The lens is provided with a diaphragm having an opening which is wider in the horizontal direction than in the vertical direction.
In this application are disclosed a variety of improvements to the original system. These improvements provide for greater utility, effectiveness, and ease of manufacturing of the laser visual landing aid system.
