Basic Pitfalls in Numerical Reconstruction of Flaws with Acoustic Holography
| Autor: | D.A. Bruck, K.J. Langenberg |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Surface (mathematics)
Computer science business.industry Aperture Mathematical analysis Holography Physics::Optics Iterative reconstruction Acoustic holography law.invention Convolution symbols.namesake Optics law symbols Perpendicular Rayleigh scattering business Surface reconstruction Fresnel diffraction Incidence (geometry) |
| Zdroj: | 1980 Ultrasonics Symposium. |
| Popis: | A basic difficulty of holographic numerical reconstruction schemes is to extract the real crack size from the reconstructed image; for example, the reconstruction properties of Fresnel t ransforms have been shown under incorrect assumptions. An analytical relationship in terms of a convolution integral is derived for the object geometry a nd its image. The evaluation of synthetic holograms of linear crack models show that the Fresnel approximation is sufficiently valid only for perpendicular incidence on surface parallel cracks |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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