Spectral Fizeau Interferometer applied to dental polymeric resins early shrinkage determination

Interferómetro de Fizeau espectral aplicado a la determinación de la contracción temprana de resinas poliméricas dentales

By: J. Antonacci, A. Mesa Yandi, N.A. Russo, R. Duchowicz, G.F. Arenas

Main Information

Volume:
Vol.51-N1 / 2018 - Ordinario
Section:
Optical Sensors
Pages:
49076:1-6
DOI:
http://doi.org/10.7149/OPA.51.1.49076
Type:
Research Paper
Language:
English
Attachments:
Keywords:
Fizeau interferometer; Dental resins; Fiber optic sensors.

Interferómetro de Fizeau; Resinas dentales; Sensores de fibra óptica.
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Abstract

In this work a variant of the well know Fiber Optic Fizeau Interferometer is presented. It is analyzed in the spectral domain and applied to the study of the shrinkage experienced by photocured polymeric resins. This approach, which maintains its main characteristics of being noninvasive 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 Fizeau Interferometer generates typical response curves that must be processed in order to obtain the measurement related to the cavity length for every moment in time. The cavity is formed between the surface of the sample under test and the fiber optic tip itself. Besides, this sensor is used to determine whether or not exothermal effects from photocuring reactions affect the net shrinkage measured in the samples.


En este trabajo se presenta una variante del interferómetro de Fizeau en fibra óptica, analizado en el dominio espectral y aplicado al estudio de la contracción experimentada por resinas poliméricas fotocuradas. Este enfoque, que mantiene las características de ser no invasivo e intrínsecamente auto-calibrado, es sensible a los cambios de sentido en la evolución de la longitud de la cavidad que se está midiendo. El Interferómetro Fizeau de Fibra óptica en el Dominio Espectral (SDFOFI, por su sigla en inglés) genera curvas de respuesta típicas que deben ser procesadas para obtener la medida relacionada con la longitud de la cavidad en cada instante de tiempo. La cavidad está formada entre la superficie de la muestra bajo estudio y la terminación de la fibra óptica. Además, este sensor es usado para determinar si los efectos exotérmicos provenientes de la reacción de fotocurado afectan o no la contracción neta medida en las muestras.

References

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