Communications: directive radio wave systems and devices (e.g. – With particular circuit – Display
Patent
1997-04-15
1998-04-07
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Display
1286531, 359 32, 36441319, 364822, 378 87, G01S 1389, A61B 5055, G06F 300, G06F 1562
Patent
active
057369585
ABSTRACT:
A method and apparatus for producing an image of a target area, by: at an observation location spaced from the target area, transmitting a beam of electromagnetic radiation toward the target area, and receiving reflections of the radiation from the target area; providing a representation of the magnitude and direction of the distance between points on the target area which produce reflections that travel in phase to the observation location; varying the spatial relation between the observation location and the target area and/or the given radiation frequency, in order to establish a plurality of different observation states which succeed one another in time, each state being associated with a distinct combination of magnitude and direction of the distance between points on the target area which produce reflections that travel in phase to the observation location; producing two coherent radiation beams, directing the two beams onto a receiving plane provided with an array of radiation receiving cells and storing output signals from each receiving cell, and controlling the two beams, for each observation state in succession; such that the two collimated beams have: beam axes which are inclined relative to one another by an angle corresponding in magnitude and direction to the magnitude and direction representations; a phase difference corresponding to the phase difference between the transmitted and received radiation; and intensities such that the product of the intensities of the two beams corresponds to the intensity product of the transmitted and received radiation.
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patent: 4042811 (1977-08-01), Brunnett et al.
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patent: 4562540 (1985-12-01), Devaney
patent: 5187598 (1993-02-01), Posluszny et al.
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Barron Jr. Gilberto
Essex Corporation
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