We apply the rigorous electromagnetic grating theory and an electromagnetic wave-propagation model with Kirchhoff boundary conditions to analyze and optimize the performance of arrays of cylindrical dielectric multilevel diffractive lenses. We show that the diffraction efficiency of a high-numerical-aperture lens array can be improved if the surface-relief profile is constructed with the use of rigorously optimized grating groove structures, which differ significantly from a multilevel approximation of a triangular profile.
© 1993 Optical Society of America
Original Manuscript: June 18, 1992
Manuscript Accepted: October 15, 1992
Published: March 1, 1993
Eero Noponen, Jari Turunen, and Antti Vasara, "Electromagnetic theory and design of diffractive-lens arrays," J. Opt. Soc. Am. A 10, 434-443 (1993)