| Autor: |
de la Rosa Miranda, E., Valdos, L. R. Berriel, Olivos-Pérez, L. I., de León, G. Miramontes |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 4/15/2008, Vol. 992 Issue 1, p957-962, 6p, 2 Black and White Photographs, 2 Diagrams, 4 Graphs |
| Abstrakt: |
Interferometers are used to measure physical magnitudes such as gradients of pressure, temperature, refractive index, deformation, etc. The common objective of these techniques is to produce a pattern of fringes modulated in phase by the physical amount to be measured The optical tomography is a nondestructive technique that allows us to obtain information about the distribution of these physical magnitudes on the basis of these interferograms. In this work, a non-iterative algebraic reconstruction technique is shown to obtain the distribution of temperature gradients of a radial phase object, fitting non-local radial basis Gaussian functions to the diagram level curves given by the interferogram orders. This method is numerically accurate and fast in any computational platform; in addition, it is easy to program. An example is shown: the temperature gradients of a lighter flame. This interferogram was obtained with a common path interferometer that uses a nonlinear material to photoinduce the required filter. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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