Abstract
Y. M. HeHuazhong University of Science andTechnologyDepartment of MechanicsHuazhong 430074ChinaC. J. TayH. M. ShangNational University of SingaporeDepartment of Mechanical and ProductionEngineering10 Kent Ridge CrescentSingapore 119260E-mail: mpetaycj@nus.edu.sgAbstract. An electronic speckle shearing interferometry method for thefull field measurement of the slope of an object is presented. The objectunder study is placed on a rotating platform and illuminated by an ex-panded laser beam. Its image is recorded by a shearing CCD cameraand stored directly into a computer. By recording two images before andafter giving the object a small angle of rotation, the resulting correlationfringe pattern that represents the object surface slope can be obtained.The theory of the new method and some experimental results are pre-sented.
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