Communications: directive radio wave systems and devices (e.g. – Determining distance – With remote cooperating station
Patent
1996-10-01
1998-11-24
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With remote cooperating station
342128, 342 6, G01S 1332
Patent
active
058413928
ABSTRACT:
A pulse-echo ranging system includes an improved target and a ranging device which emits pulses of electromagnetic radiation toward the target and receives pulses reflected from the target. The target is provided with a modulating mechanism for modulating the reflected pulses in a predetermined manner. The modulating mechanism allows the ranging device to distinguish pulses truly reflected from the target from noise and pulses reflected from objects other than the target. More specifically, the modulating mechanism may include a reflector which reflects the pulses at plural distances from the ranging device. The reflector may include a single reflective surface coupled to an oscillating vibrator, or plural reflective surfaces spaced at different locations from the ranging device.
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Nikon Corporation
Sotomayor John B.
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