Non-destructive testing method and apparatus utilizing phase multiplication holography

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865197

Collins, H Dale ^[1]; Prince, James M ^[2]; Davis, Thomas J ^[1]

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1. Richland, WA
2. Kennewick, WA

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.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• DOE Contract Number: AT(45-1)-1830
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4476434
• OSTI ID: 865197
• Country of Publication: United States
• Language: English

Related Subjects

non-destructive
testing
method
apparatus
utilizing
phase
multiplication
holography
imaging
structural
characteristics
radiation
amenable
coherent
signal
processing
methods
frequency
received
flaw
signals
simulate
wavelength
magnitude
apparent
reduction
illumination
recording
performs
translation
hologram
constructed
synthetic
similar
conventional
acoustic
construction
processing methods
processing method
structural characteristics
signal processing
apparatus utilizing
signal process
non-destructive testing
utilizing phase
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