Person:
González Cano, Agustín

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First Name
Agustín
Last Name
González Cano
URI
https://hdl.handle.net/20.500.14352/79943
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Óptica y Optometría
Department
Óptica
Area
Optica
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1999 - 20003
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Author: Quiroga Mellado, Juan Antonio × Has files: false ×

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Now showing 1 - 3 of 3
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    Phase measurement method for stress analysis from photoelastic data
    (Iutam Symposium On Advanced Optical Methods and Applications in Solid Mechanics, 2000) Quiroga Mellado, Juan Antonio; González Cano, Agustín
    In recent years, phase measuring techniques have been applied to the problem of extracting information from photoelastic data. In this work, a complete method for stress analysis from photoelastic fringe patterns is presented. The photoelastic phase maps are obtained with a circular polariscope. For the isoclinics calculation a four-step phase-shift algorithm is used. A white light source is used to avoid problems of low modulation in the fringe pattern. Isochromatics are calculated by a new algorithm developed by us that overcomes the problems associated to low modulation areas produced by isoclinics. The isochromatic parameter can be determined without sign ambiguity. We have also developed a method for analysis of the measurement errors produced by errors in the elements of the polariscope. Finally, using the equilibrium equations, we can obtain the values of the main stresses in the sample from the isoclinic and isochromatic parameters.
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    Application of regularization methods to the analysis of photoelastic fringe patterns
    (Interferometry 99: Techniques and Technologies, 1999) Quiroga Mellado, Juan Antonio; González Cano, Agustín
    In this work we present the application of a regularization algorithm to the processing of photoelastic hinge patterns. The method used is a modified phase tracking algorithm applied to phase-shifted images. In particular, we present an algorithm for isoclinics-isochromatics separation that uses only five images. The performance of the method is discussed and experimental results are presented.
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    On the dependence on isoclinics of the modulation of isochromatic phase maps
    (Optik, 1999) Quiroga Mellado, Juan Antonio; González Cano, Agustín
    In this work we evaluate the dependence on isoclinics of the modulation of the isochromatic phase maps when phase-shifting algorithms are applied to experiments of photoelasticity. This dependence makes conventional phase-shifting algorithms unsuitable for that application.