Abstract: System for guiding a missile in a direction of sight, comprising, at emission, a source of emission producing a light beam of which the axis defines the direction of sight and a device for modulating the beam emitted, and, on the missile, at least one photodetector and a processing circuit for determining, from the output signal from the detector, at least one coordinate of the missile with respect to the direction of sight, said coordinate being applied to the control surfaces of the missile in order to control the path of the missile on the direction of sight. The modulation device comprises a sight in the form of a band comprising repetitive motifs, a movement of translation at constant speed being created between the beam and the sight, in a direction perpendicular to the axis of the beam, each motif comprising opaque and transparent parts, the opaque and/or transparent parts having a length (measured in the direction of displacement) which varies according to the height in question.

Abstract: System for guiding a missile, comprising a source emitting a light beam of which the axis defines the direction of sight, at least one modulation sight placed in the path of the beam, means for producing a relative movement of rotation between the sight and the beam, and on the missile, at least one detector and a calculating circuit for determining, from the output signal from the detector, the coordinates of the detector with respect to the direction of sight.The control surfaces of the missile are actuated as a function of said coordinates with a view to controlling the path of the missile on the direction of sight.The modulation sight comprises transparent and opaque, and possibly semi-transparent sectors, defined by curves symmetrical with respect to the center of the sight, at least certain of these curves having for equation f (.rho., .theta. modulo .pi.)=O, where .rho.varies monotonically as a function of .theta.

Abstract: A device for suppressing the interference echo signals in an optical pulse compression radar comprising, at the transmitting side, a circuit for generating electrical signals of determined duration and with a frequency variable as a function of time, called chirps, an optical transmitter comprising a continuous transmission source modulated by the chirps and, at the receiving side, a receiver for deriving chirps from the light signals received and a processing circuit for the chirps supplied by the receiver, comprising a first mixer receiving from said receiver the reception chirp and from said circuit the transmission chirp and then, when the latter is ended, a relay signal of a determined frequency, said first mixer delivering a signal of a frequency equal to the difference of the frequencies of the input signals, a filter for filtering out the interference component of the output signal from the first mixer, and a second mixer receiving, on the one hand, the signal thus filtered and, on the other hand, the

Abstract: A system for transmitting alignment data from the turret of an aircraft carrier to aircrafts stationed on the flight deck, comprising optical transmitters with modulable beams placed on the turret, means for modulating the transmitter beam from the data, an optical detector placed on each aircraft and means for demodulating the output signal of the detector, wherein each transmitter comprises a plurality of infrared electroluminescent diodes and means for changing the beam from the diodes into a beam which is substantially horizontal with an angle of site of a few degrees, the transmitters being arranged in such a manner that the adjacent transmitter beams overlap to a large extent and the optical detector is omnidirectional in the horizontal plane.