Wave interrogated near field array system and method for...

Details Wave interrogated near field array system and method for... Wave interrogated near field array system and method for...

2006-11-07

2006-11-07

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S306000, C343S721000

Reexamination Certificate

active

07132640

ABSTRACT:
An array of antenna elements (20) can be used to detect subwavelength sized anomalies on a surface below the array. An array (20) is illuminated at optical frequencies by a coherent optical energy source (26). The change in reactance and radiated power of the antenna elements that results from the proximity of the anomaly to the near field of the antenna element's open-circuited is detected and holographically filtered to eliminate the radiation caused by the antenna array itself. Image processing is performed on the detected scattered radiation (100) to determine whether an anomaly is present and to locate the anomaly and its characteristics.

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patent: 6288856 (2001-09-01), Ottesen et al.
patent: 7019704 (2006-03-01), Weiss
Igasaki, et al., “High efficiency electrically-addressable phase-only spatial light modulator”, Optical Review, vol. 6, No. 4 (1999) pp. 339-344.
Edwards et al., “Investigation of photoconductive silicon as a reconfigurable antenna”, SPIE vol. 1918, Smart Sensing, Processing, and Instrumentation, (1993) pp. 344-353.

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