Direct 2D calculation of quantized DOEs on the basis of a continuous series approach

Abstract

A new method of calculation of binary-phase and quantized diffractive optical elements (DOEs) is proposed. The design uses a specific series of expressions for the quantized DOE transmission function and is based on the gradient search algorithm for the optimization of a truncated series approaching the quantized complex transmission function. A fast method for design of binary beam shapers and multi-order binary gratings with equal order intensities are reported with efficiency in the range of 70–75% and the root mean square errors of 3–5%.