Sagem Defense Securite

Sagem Defense Securite Le Ponant De Paris

Bernard Ruocco-Angari

Henri G Pruvot

A cooled cryostat device comprising: a cold finger having infrared detector means secured to the end thereof; an outer casing surrounding the cold finger; and stiffener means for stiffening the cold finger and interposed between the outer casing and the cold finger in the vicinity of the end thereof. The stiffener means comprising: first eyelets provided on the inside of the casing and around its periphery; second eyelets provided on the outside of the cold finger around its periphery; the first and second eyelets being mutually angularly offset; and a cable tensioned around a closed loop between the outer casing and the cold finger and passing freely through the first and second eyelets, with the cable, once the cold finger has been placed in a balanced situation, itself being secured to the outer casing and to the cold finger.

Cooled cryostat device

A cooler machine using the Stirling cycle and comprising: at least one compressor with a compressor piston movable in a compression cyclinder; a regenerator with a regenerator piston movable in a regeneration cyclinder placed at a given angle relative to the compression cyclinder; a rotary drive crank; and two connecting rods, respectively a compressor connecting rod coupled to the compressor piston, and a regenerator connecting rod coupled to the regenerator piston, and both coupled to the crank with a mutual angular offset; the compressor and/or regenerator connecting rod is arranged to be of length that is variable over a rotation of the crank in such a manner that the movement of the corresponding piston is least slowed down on passing through top and/or bottom dead center.

Refrigerating machine using the stirling cycle

Method of identifying an infrared matrix sensor, characterized in that, for at least some of the pixels of the sensor matrix, information concerning the position of the pixel in the matrix is recorded and information concerning at least one characteristic of each of the pixels is determined, and in that all of these pairs of information associated with the respective pixels (or mapping) are kept in memory as sensor identifier information.

Growing community of inventors

Paris, France

Bernard Ruocco-Angari