Detection apparatus infrared radiation, said apparatus equipped with homing and self-guided missile equipped with said homing.

摘要

Apparatus (5) for detecting electromagnetic waves, comprising: - a casing (6) defining an enclosure (7) under vacuum, and formed by assembly of several parts, of which three (24, 29, 34) they are titanium or titanium alloy, being two of them (29, 34) fixed to one another by laser welding, and - a cold finger (12), comprising a tubular Dewar container (14), or titanium alloy titanium extending inside said enclosure (7), being sealably attached to said housing (6) at one end of said container Dewar (14), whose other end is closed by an end wall ( 16) on which is mounted a sensor (4) electromagnetic waves; being the two parts (29, 34) of the housing (6) fixed to each other (29, 34): - a flange (29) for fixing the device (5) to a support (30) external to said housing (6 ); and - a cap (34) provided with an opening (35) located vertically above the said sensor (4), and closed sealingly by a window (11) transparent to electromagnetic radiation to which said sensor (4) is sensitive; this device (5) being characterized in that the third of said three parts (24, 29, 34) of titanium or titanium alloy assembled to form the housing (6) is a main body (24) provided with steps (19, 23) for watertight connectors (18, 22) connecting said sensor (4) to an external electronic card to said housing (6); and in that said flange (29) is fixed to one and the other of the other two pieces (24, 34) of titanium or titanium alloy of said housing (6) by laser welding, and said end wall (16) the cold finger (12) is also of titanium or titanium alloy, so that the cold finger (12) and the housing (6) are both made of titanium or titanium alloy, being the materials of said cold finger ( 12) and said housing (6) identical, and in that said cold finger (12) further comprises a base (13), also of titanium or titanium alloy, preferably the same material as said housing (6) and / or said Dewar vessel (14), and which is in the form of a pierced by a central bore (36) and so fixed cylinder sealed by laser welding on the one hand to said main body (24) of said housing (6), along a peripheral edge (37) of said base (13) and, secondly, to said Dewar container (14), latches in said bore (36) of said base (13), so that said Dewar container (14) extends projecting from said base (13).