Holographic arrays for multi-path imaging artifact reduction

Patent · Mon Nov 12 23:00:00 EST 2007

OSTI ID:919878

McMakin, Douglas L ^[1]; Sheen, David M ^[1]; Hall, Thomas E ^[2]

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1. Richland, WA
2. Kennewick, WA

A method and apparatus to remove human features utilizing at least one transmitter transmitting a signal between 200 MHz and 1 THz, the signal having at least one characteristic of elliptical polarization, and at least one receiver receiving the reflection of the signal from the transmitter. A plurality of such receivers and transmitters are arranged together in an array which is in turn mounted to a scanner, allowing the array to be passed adjacent to the surface of the item being imaged while the transmitter is transmitting electromagnetic radiation. The array is passed adjacent to the surface of the item, such as a human being, that is being imaged. The portions of the received signals wherein the polarity of the characteristic has been reversed and those portions of the received signal wherein the polarity of the characteristic has not been reversed are identified. An image of the item from those portions of the received signal wherein the polarity of the characteristic was reversed is then created.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA
• Sponsoring Organization: United States Department of Energy
• DOE Contract Number: AC05-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): 7,295,146
• Application Number: 11/088,470
• OSTI ID: 919878
• Country of Publication: United States
• Language: English