US 5,557,283 A · Real-time wideband holographic surveillance system

Abstract

A wideband holographic surveillance system including a transceiver for generating a plurality of electromagnetic waves; antenna for transmitting the electromagnetic waves toward a target at a plurality of predetermined positions in space; the transceiver also receiving and converting electromagnetic waves reflected from the target to electrical signals at a plurality of predetermined positions in space; a computer for processing the electrical signals to obtain signals corresponding to a holographic reconstruction of the target; and a display for displaying the processed information to determine nature of the target. The computer has instructions to apply a three dimensional backward wave algorithm.

Claims24

Dependent claims

A holographic apparatus for near real-time imaging of a target, said apparatus utilizing millimeter wave radiation having a plurality of frequencies from about 1 to about 110 GHz, comprising:

(a) a holographic array having a plurality of antenna units spaced apart from about 0.25 to about 3 wavelength, wherein each unit sends and/or receives millimeter wave radiation, said array spaced apart from said target;
(b) a holographic wideband transceiver for operating said antenna units and providing each unit with millimeter wave radiation source, then receiving high frequency millimeter wave radiation reflection from said target and collected by the unit, then making an output;
(c) an analog to digital converter for converting said output to a corresponding digital signal;
and
(d) a computer for applying a three-dimensional reconstruction algorithm to the corresponding digital signal that preserves an unlimited depth of field.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

08/440,279Filed 12 May 1995 · continuation in part

Priority

30 Aug 1991

Granted

17 Sep 1996

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01S 13/89
Radar or analogous systems specially adapted for specific applications: for mapping or imaging
G01S 13/887
Radar or analogous systems specially adapted for specific applications: for detection of concealed objects, e.g. contraband or weapons
G01V 8/005
Prospecting or detecting by optical means: operating with millimetre waves, e.g. measuring the black losey radiation
A61B 5/05
Measuring for diagnostic purposes ; Identification of persons: detecting, measuring or recording for diagnosis by means of electric currents or…

Family

Serial752,750Parent of this continuation-in-part · filed 30 Aug 1991

Serial963,204Parent of this continuation-in-part · filed 23 Nov 1992

Serial212,432Parent of this continuation-in-part · filed 14 Mar 1994

US 5,455,590 AParent of this continuation-in-part

US 5,557,283 AThis patent

From the US filing history. Foreign family members aren’t listed.

Real-time wideband holographic surveillance system

Life of this patent

Real-time wideband holographic surveillance system

Life of this patent

Abstract

Claims24