O fenômeno do speckle como introdução à metrologia óptica no laboratório didática

Abstract

In this work we present the measurement of the linear coefficient of thermal dilatation of aluminium, using the obtained interferogram from Fourier transform over the sum of two displaced speckle images. The achieved result is in good agreement with tabled value and the required components have an accessible cost, turning the experiment an interesting alternative for introduction of optical metrology in teaching laboratory or a project to be developed in experimental subjects. Copyright by the Sociedade Brasileira de Física.