Speckle interferometric technique to assess soap films

An speckle interferometric technique to monitor the thinning process of vertical soap film before the film rupture is presented -- The interferometric arrangement consists in a double aperture pupil optical system which images an input diffuser -- In a first step, a reference specklegram is stored in the computer buffer memory -- Afterwards, the soap film is located in front of one pupil aperture, an uniform displacement of the diffuser is produced and a new speckle pattern is stored -- The soap film status is characterized in terms of the changes that this dynamic phase object introduces in the correlation fringes obtained by applying a FFT algorithm to the resulting summed specklegram. This procedure is done in real time as far as the soap film evolves in the successive status -- It is experimentally demonstrated that the soap film during drawing acts as a variable wedge -- The correlation fringes behavior becomes an important tool to establish the wedge shaped soap film angle and the thickness variations 2003 Elsevier B.V. All rights reserved

• Autores: Ángel Toro, Luciano; Bolognini, Néstor Alberto; Tebaldi, Myrian Cristina; Trivi, Marcelo Ricardo
• Fecha de publicación: 2003
• Institución: Universidad EAFIT
• Repositorio: Repositorio EAFIT
• Idioma: eng
• OAI Identifier: oai:repository.eafit.edu.co:10784/4244
• Acceso en línea: http://hdl.handle.net/10784/4244
• Palabra clave: Interferometría digital; Película de jabón; Cuña variable; Variaciones de espesor; INTERFEROMETRÍA; PELÍCULAS ÓPTICAS; REFLEXIÓN; TENSIÓN DE SUPERFICIES; INTERFEROMETRÍA HOLOGRÁFICA; PELÍCULAS LÍQUIDAS; Interferometry; Optical films; Reflection (physics); Surface tension; Holographic interferometry; Liquid films; Interferometría digital; Película de jabón; Cuña variable; Variaciones de espesor
• License: Acceso restringido