%0 Journal Article %A Alda Serrano, Javier %A Sánchez Brea, Luis Miguel %A Salgado Remacha, Francisco Javier %A Rico García, José María %T Diffractive optical elements with square concentric rings of equal width %D 2010 %@ 0895-2477 %U https://hdl.handle.net/20.500.14352/44915 %X A diffractive optical element having equal-width concentric square rings is analyzed in this article. This constant width makes possible its realization using spatial light modulators or square pixels phase screens. It allows a simple analytical treatment, and the element is also simulated using the Rayleigh-Sommerfeld approach. An experimental verification of its performance has been compared with the simulated results. %~