Figure 6. Performance of a multi-focus lens with a relative larger aperture.

(a–c) 2D Intensity in the xz-plane for λ = 532, 632.8 and 785 nm. (d–e) Intensity distribution along the z-direction at x = y = 0. The radius of the sample is 100 μm and the focal length is 90 μm, thus the numerical aperture is the same as the sample shown in Fig. 4.