NDLI: Radiographic moire (Document No: 19950007422)

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Radiographic moire (Document No: 19950007422)

Content Provider	NASA Technical Reports Server (NTRS)
Organization	The National Aeronautics and Space Administration (NASA)
Copyright Year	1994
Description	A method for the x-ray inspection of materials making use of the Moire effect is described. The Moire effect results when two patterns are superimposed; a third pattern is produced. Any change in either of the first two patterns creates a change in the third. Moire inspection is common with visible light. This invention allows the technique to be extended to locations inaccessible to visual inspection. A first pattern of high radio contrast material is attached to or included in the sample. X-rays are projected through the sample. A second pattern is imposed at the observation point, either before or after the formation of the x-ray image. The two patterns interact to create a third, Moire, pattern. As the material is stressed the Moire pattern changes, the degree of change indicating the degree of stress.
File Size	427323
File Format	PDF
Alternate Webpage(s)	http://www.archive.org/details/nasa_techdoc_19950007422
Archival Resource Key	ark:/13960/t4mk76h9j
Language	English
Publisher Date	1994-05-31
Publisher Institution	Langley Research Center
Access Restriction	Open
Subject Keyword	Complex Systems Computer Programs Programming Environments Real Time Operation Software Development Tools Computer Graphics Data Management Information Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Patent

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