Detection device for detecting head of directed infrared counter-measure system in e.g. aircraft, has separation element arranged with respect to objective and matrix detector to produce reference and secondary images on surface of detector

• Main Author: PEALAT MICHEL
• Format: Patent
• Language: English; French
• Published: 29.05.2009
• Subjects: AIMING; ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ARMOUR; ARMOURED OR ARMED VEHICLES; ARMOURED TURRETS; BASIC ELECTRIC ELEMENTS; BLASTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; LIGHTING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SEMICONDUCTOR DEVICES; TESTING; WEAPON SIGHTS; WEAPONS

The device has a spectral infrared radiation separation element (3) for differently modifying direction of a radiation portion according to wavelength for a fixed set of wavelengths. The separation element is arranged with respect to an objective (1) and to a matrix detector (2) to produce a reference image (P0) and a secondary image (P1) on detection surface of the detector. The secondary image of a target is located at distance from the reference image, which depends on the wavelength of the infrared radiation from the target. Independent claims are also included for the following: (1) a detection head for a directed infrared counter-measure system comprising a detecting device (2) a directed infrared counter-measure system comprising a detection head. Un dispositif de contre-mesure pour guidage infrarouge (DIRCM) possède un fonctionnement efficace dans un intervalle large de longueur d'onde, tout en ne comprenant qu'un unique détecteur (2). Pour cela, un élément de séparation spectrale de rayonnement (3) est placé devant un objectif (1) du dispositif, de façon à produire des segments d'images secondaires (P1) sur le détecteur, en plus d'une image de référence (P0). Une analyse des segments d'images secondaires permet d'identifier une longueur d'onde de détection qui est utilisée pour le guidage d'un missile.