SPECTRAL FIZEAU INTERFEROMETER APPLIED TO DENTAL POLYMERIC RESINS EARLY SHRINKAGE DETERMINATION

ANTONACCI, JULIÁN; MESA YANDY ANGÉLICA MARIA; RUSSO NÉLIDA A.; DUCHOWICZ, RICARDO; ARENAS GUSTAVO F.

Pucón

Congreso; IX Reunión Iberoamericana de Óptica y XII Reunión Iberoamericana de Óptica, Láseres y Aplicaciones (RIAO/OPTILAS); 2016

Centro de Óptica y Fotónica de la Universidad de Concepción

In this work it is presented a variant of the well know Fiber Optic Fizeau Interferometer analyzed in the spectral domain and applied to the study of the shrinkage experimented by photocured polymeric resins. This approach, which maintains its main characteristics of being non invasive and intrinsically self-calibrated, is sensitive to changes in the direction of evolution of the interferometric cavity length which is being measured. The Spectral Domain Fiber Optic Interferometer (SDFFOI) generates typical response curves that must to be processed in order to obtain the measurement related to the cavity length for every moment in time. The cavity is formed between the sample under test and the fiber optic tip itself. In particular, this sensor is used to determine whether or not exothermal effects from photocuring reactions affect the net shrinkage measured in the samples.