A simple bi-convex refractive laser beam shaper

This paper describes a novel bi-convex single aspheric lens that converts a spatially non-uniform laser beam into one with a uniform intensity distribution. The basis for this new lens is derived theoretically and lens performance is evaluated using detailed simulation under different conditions. This new design leads to a simple single-aspheric-lens configuration that substantially reduces fabrication difficulty. A method for compensating profile distortion induced by non-ideal factors is introduced. In addition, the limitations for practical applications are also discussed.