Research Article

Generation of Multiple Focal Hole Segments Using Double-Ring Shaped Azimuthally Polarized Beam

Figure 3

(Colour online) shows the contour plot of the total intensity distribution in the plane near the focus for the focusing system with 5-belt binary phase filters. (a) Double-ring focus and (b) four-ring focus.
451715.fig.003a
(a)
451715.fig.003b
(b)