Numerical simulations: Maps of the energy transmission for a point-like source observed through a coronagraph using a wrapped vortex phase mask at wavelengths λ from 600 to 800 nm. The excursion of the source goes from −30 λ/D to 30 λ/D from the center of the phase mask in both horizontal and vertical directions. The color bar goes from 0 (no light is transmitted) to 1 (all flux is transmitted).