We present a fast and general iterative design method for both diffractive and nondiffractive two-dimensional optical elements. The method is based on a finite-thickness model in combination with the Yang–Gu phase-retrieval algorithm. A rigorous electromagnetic analysis (boundary element method) is used to appraise the designed results. We calculate the transverse-intensity distributions, diffraction efficiency, and spot size of the designed microlenses at the focusing plane for microlenses designed using the presented method and the conventional zero-thickness model. The main findings show the superiority of the presented method over the conventional method, especially for nondiffractive optical elements.
© 2007 Optical Society of America
Optical Design and Fabrication
Original Manuscript: June 2, 2006
Revised Manuscript: August 7, 2006
Manuscript Accepted: August 25, 2006
Christer Rydberg, Ben-Yuan Gu, and Guo-Zhen Yang, "Design method for small-f-number microlenses based on a finite thickness model in combination with the Yang-Gu phase-retrieval algorithm," J. Opt. Soc. Am. A 24, 517-521 (2007)