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Opt Express. 2000 Sep 11;7(6):237-42.

A rigorous unidirectional method for designing finite aperture diffractive optical elements.


We have developed a rigorous unidirectional method for designing finite-aperture diffractive optical elements (DOE's) that employs a micro-genetic algorithm (microGA) for global optimization in conjunction with a 2-D Finite-Difference Time-Domain (FDTD) method for rigorous electromagnetic computation. The theory and implementation of this microGA-FDTD design method for normally incident TE illumination are briefly discussed. Design examples are presented, including a micro-lens, a 1-to-2 beam-fanner and a 1-to-3 beam-fanner.

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