A refracting system is designed for transforming an annular
Gaussian laser beam into a circular Bessel beam. The slope of the
input and output surfaces fitted well with a sixth-order
polynomial. The radii of curvature of the resulting aspheric
surfaces are found to vary smoothly over the surface. The
diffraction-free length for this system is found to be 59.4735 m at 633
© 1998 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.