Numerical Analysis of Working Distance of Square-shaped Beam Homogenizer for Laser Shock Peening

To apply a square-shaped beam homogenizer to laser shock peening, it should be designed with a longworking distance and by considering metal targets with various shapes and textures. For long workingdistances, a square-shaped beam homogenizer with a long depth of focus is required. In the range ofworking distance, the laser beam is required to have not only high efficiency but high uniformity, in otherwords, a good peening quality is guaranteed. In this study, we defined this range as the working distancefor laser shock peening. We have simulated the effect of some parameters on the working distance. Theparameters include the focal length of the condenser lens, pitch size of the array lens, and plasma thresholdof the metal. The simulation was performed through numerical analysis by considering the diffraction effect. KCI Citation Count: 2