Measuring of temperatures of phase objects using a point-diffraction interferometer plate made with the thermocavitation process

Juan C. Aguilar; L. R. Berriel-Valdos; J. Felix Aguilar; S. Mejia-Romero

doi:10.1117/12.927851

25 September 2012 Measuring of temperatures of phase objects using a point-diffraction interferometer plate made with the thermocavitation process

Juan C. Aguilar, L. R. Berriel-Valdos, J. Felix Aguilar, S. Mejia-Romero

Author Affiliations +

Proceedings Volume 8494, Interferometry XVI: Applications; 84940K (2012) https://doi.org/10.1117/12.927851
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

An optical system formed by four point-diffraction interferometers is used for measuring the refractive index distribution of a phase object. The phase of the object is assumed enough smooth to be computed in terms of the Radon Transform and it is processed with a tomographic iterative algorithm. Then, the associated refractive index distribution is calculated. To recovery the phase from the inteferograms we use the Kreis method, which is useful for interferograms having only few fringes. As an application of our technique, the temperature distribution of a candle flame is retrieved, this was made with the aid of the Gladstone-Dale equation. We also describe the process of manufacturing the point-diffraction interferometer (PDI) plates. These were made by means of the thermocavitation process. The obtained three dimensional distribution of temperature is presented.

Citation Download Citation

Juan C. Aguilar, L. R. Berriel-Valdos, J. Felix Aguilar, and S. Mejia-Romero "Measuring of temperatures of phase objects using a point-diffraction interferometer plate made with the thermocavitation process", Proc. SPIE 8494, Interferometry XVI: Applications, 84940K (25 September 2012); https://doi.org/10.1117/12.927851

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