Scanning apparatus which may be used in a real-time passive millimetre wavelength imaging system or in other radiometry systems. The apparatus scans input radiation from a scene and output radiation is transmitted to a receiver system, for example a millimetre wave imaging camera or a radar receiver. The apparatus comprises a rotatable reflective plate having an axis of rotation passing through the centre of its surface and a lens arrangement for selectively transmitting and focusing radiation having a particular direction of polarisation. The apparatus may also comprise a feed horn array comprising a plurality of feed horns, the feed horns forming part of a spherical surface having a radius of curvature substantially equal to R/2 and being concentric with the third substantially spherical polarising element. The apparatus may further comprise a detector array comprising a plurality of detector elements. The detector array may form part of a millimetre wave imaging camera.
申请公布号
WO0014587(A1)
申请公布日期
2000.03.16
申请号
WO1999GB02834
申请日期
1999.08.27
申请人
THE SECRETARY OF STATE FOR DEFENCE;LETTINGTON, ALAN, HAROLD;ANDERTON, RUPERT, NICHOLAS
发明人
LETTINGTON, ALAN, HAROLD;ANDERTON, RUPERT, NICHOLAS