Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Reexamination Certificate
2007-03-13
2007-03-13
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
C324S763010, C324S765010
Reexamination Certificate
active
10920723
ABSTRACT:
An apparatus for inspecting a sample for defects includes a signal generator for generating a signal and a device for splitting the signal into two separate signals which have substantially equal phase and magnitude. A sensor radiates the two signals on the sample and receives the two signals reflected from the sample. A device is provided for determining a difference between the two signals reflected from the sample without unwanted influence of variations of distance between the sensor and sample, and reflections from nearby sample edges and boundaries. A defect is determined to exist when a difference is found between the two reflected signals.
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Ghasr Mohammad Tayeb Ahmad
Kharkivskiy Sergiy
Zoughi Reza
Greer Burns & Crain Ltd.
Hirshfeld Andrew H.
Kramskaya Marina
The Curators of the University of Missouri
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