Figure 3
From: Bifocal diffractive lenses based on the aperiodic Kolakoski sequence
Phase transmission function \(\phi _S(\zeta )\) of the KZP of order \(S=7\). The associated Kolakoski sequence is \(K_7=\{1,2,2,1,1,2,1,2,2,1,2,2,1,1,2,1,1,2,2,1,2,1,1\}\). Note that the phase function takes values \(\pi\) or \(2\pi\) (phase 0) at the j-th sub-intervals of \(K_7\) where \(K_{7,j}\) is “1” or “2”, respectively.
