Near-Field Diffraction from a Binary Microaxicon

Figure 5

Diffraction patterns recorded with the CCD-camera from the axicons with period (a), (b) 4 μm and (c), (d) 8 μm at different distances: (a) 5 μm, (b) 8 μm, (c) 16 μm, and (d) 18 μm.

(a)

(b)

(c)

(d)