Capabilities of beam shaping with diffractive optics are substantially improved by a concept of crossed zones. We generalized the map transformation design of beam shapers by additional set of diffractive zone borders orthogonal to phase isolines. Application of nonlinear transformation to diffractive grooves profile, provided another method of building crossed-zones. Computer simulation results confirm feasibility and flexibility of the proposed approach.
Michael A. Golub, Michael A. Golub,
"Beam shaping with cross-zoned diffractive optical elements", Proc. SPIE 10590, International Optical Design Conference 2017, 1059016 (27 November 2017); doi: 10.1117/12.2291741; https://doi.org/10.1117/12.2291741