Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1982-01-25
1984-10-09
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324226, 324262, G01R 3312, G01N 2772
Patent
active
044764340
ABSTRACT:
An apparatus and method for imaging of structural characteristics in test objects using radiation amenable to coherent signal processing methods. Frequency and phase multiplication of received flaw signals is used to simulate a test wavelength at least one to two orders of magnitude smaller than the actual wavelength. The apparent reduction in wavelength between the illumination and recording radiation performs a frequency translation hologram. The hologram constructed with a high synthetic frequency and flaw phase multiplication is similar to a conventional acoustic hologram construction at the high frequency.
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Collins H. Dale
Davis Thomas J.
Prince James M.
Constant Richard E.
Esposito Michael F.
Snow Walter E.
Southworth III Robert
Strecker Gerard R.
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