Abstract

By experiments in integrated photoelasticity it has been observed that besides the usual interference fringes, interference blots may appear. The latter are areas where interference fringes have low contrast or even vanish totally. It has been shown that the cause of the interference blots is rotation of the principal stress axes. Since an arbitrary inhomogeneous birefringent medium is optically equivalent to a system of two birefringent plates, in this paper conditions of the appearance of the interference blots and of the dislocation of integrated fringes is studied using this simple model. Computer generated fringe patterns are compared with the experimentally recorded ones.KeywordsFringe PatternFringe OrderOptical RetardationBurger CircuitBoussinesq ProblemThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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