A refracting system consisting of two lenses is designed to transform an annular Gaussian laser beam into a circular Bessel beam. The slopes of the input and output surfaces fit well with a sixth-order polynomial. A smooth variation of the radii of curvature of the resulting aspheric surfaces is very attractive for easy machining of the surfaces. The diffraction-free length for the designed system is 59.4735 m at 633 nm.
© 1998 Optical Society of America
Muhammad Arif, Meer M. Hossain, Abdul Ahad S. Awwal, and Muhammad N. Islam, "Two-Element Refracting System for Annular Gaussian-to-Bessel Beam Transformation," Appl. Opt. 37, 4206-4209 (1998)