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Radiographic moire
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1996 |
| 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 | 412711 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080004156 |
| Archival Resource Key | ark:/13960/t6b32sv9d |
| Language | English |
| Publisher Date | 1996-01-09 |
| Access Restriction | Open |
| Subject Keyword | Radiography X Ray Inspection Patents Nondestructive Tests Moire Effects Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
