Headup display systems for aircraft piloting

Claim 1

A movable arrangement for illuminating a reticle in a headup display system, used in an aircraft for projecting At infinity in front of the pilot the luminous images of reticles for providing him with the information corresponding to the aircraft flight, (each reticle being mounted on a movable assembly controlled in position,) said arrangement being controlled in position and said reticle being locked with said arrangement, said arrangement comprising: a hollow shaft having opaque lateral walls and one opaque end wall, (fixed to said assembly), said reticle being formed in said end wall; a lampholder slidably mounted in said hollow shaft, said lampholder being suitable for pluging-in at least two lamps; at least two lamps supported by said lampholder, inside said shaft means for selectively lighting different portions of said reticle, said means comprising at least one partition between said lampholder and said end wall for building up at least two separately lightable compartment, each compartment comprising at least one of said lamps, (at least one lamp supported by said lampholder inside said shaft;) a translucent body for diffusing the light emitted by said lamps, said body being arranged between said lamps and said reticle; and means associated with said lampholder for connecting (of) said lamps to a source.