Distribution characteristics of intensity and phase vortices of speckle fields produced by N-pinhole random screens |
The phase distribution patterns produced by the multi-pinhole aperture, (a) N = 4, (b) N = 8, (c) N = 10, (d) N = 12, (e) N = 16, (f) N = 20, (g) a large single ring aperture and (h) a large single circular aperture, corresponding to the patterns in Figs. 2(a) – 2(h) , respectively. |