OBLIQUE OBSERVATION SPECKLE SHEAR INTERFEROMETERS FOR SLOPE CHANGE CONTOURING

Two new simple speckle shear interferometry configurations for slope c hange contouring of three-dimensional curved objects are presented in this paper. Analysis has shown that the first configuration is sensiti ve only for slope change variations of the object and is insensitive t o all other deformations while the second configuration yields fringes corresponding to slope change and contouring and is free from shadowi ng. Detailed theory and experimental results on a domestic light bulb are presented. These configurations provide controllable sensitivity a nd can easily be adopted in television shearography.