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The research focuses on measuring the influence of angel on wedge waves propagating along cylinder wedge tip and its characteristic of dispersion by using the laser ultrasound technique. The wedge waveguide models with different angle were built by using finite element method (FEM). The dispersion curves were obtained by using 2D Fourier transformation method. Multiple mode wedge waves were observed, which was well agreed with the results estimated from Lagasse’s empirical formula. We had established cylinder wedge with radius of 3mm and angle of 10°, 20°, 30°, 40‡, 50°, 60°, 70°, and 80°, respectively. It was found that radius caused abnormal dispersion to the mode of cylinder wedge with small angle and normal dispersion to the mode of cylinder wedge with big angle.
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