Active proximity fuse

Details Active proximity fuse Active proximity fuse

F - Mech Eng,Light,Heat,Weapons

42

C

F42C 13/02 (2006.01) G01S 7/499 (2006.01)

Patent

CA 2084433

The invention relates to an active proximity fuse with polarisation-related sensitivity. Radiation (11) which is reflected by particles (10) in the atmosphere towards the receiver (8) of the proximity fuse and which does not originate from reflection at the target (3) has a negative effect on the operation of a proximity fuse. To reduce this effect, the proximity fuse according to the invention is provided with elements (5) in the transmitter (1) of the proximity fuse for linearly polarising the emitted radiation (6) and elements (12) in the receiver (8) for suppressing the received radia- tion with linear polarisation essentially coinciding with the direction of the linear polarisation of the emitted radiation (6). This arrangement prevents radiation (11) which is reflected by spherical particles (10), such as water droplets, with unchanged polarisation after reflec- tion, from reaching the detector of the receiver, whilst radiation reflected by the target (3) is depolarised and a certain part of the radiation (9) can be detected.

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