Phase-shifting real-time holography with photorefractive Bi(12)SiO(20) crystal as holographic recording medium applied to load transmission evaluation and tension dissipation on a dried human skull under loading is presented. The applied loading stands as a simulation of isolated contraction (SIC) of some masticatories muscles. The four-frames phase-shifting technique and the unwrapping branch-cut technique were used to obtain the phase map. The quantitative results show the feasibility of the employed system in the study of microdisplacements in the skull structure provided by SIC.
Neste trabalho apresentamos a medida do coeficiente linear de dilatação térmica do alumínio, usando o interferograma obtido a partir da transformada de Fourier sobre a soma de duas imagens de speckle deslocadas. O resultado alcançado está em bom acordo com o tabelado e os equipamentos necessários têm custo acessível, tornando o experimento uma alternativa interessante para introdução da metrologia óptica no laboratório didático ou um projeto a ser desenvolvido em disciplinas experimentais.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.