Figure 7
The experimental arrangement for the observation of the far-field diffraction patterns of Bessel beams, higher order Gaussian beams and their superposition from a glass diffuser.
L = lens, SLM = spatial light modulator, M = mirror, CCD = charge couple device camera, F = ND filter. Focal lengths of lenses: f1 = 150 mm, f2 = 1000 mm, f3 = 680 mm, f4 = 400 mm and f5 = 800 mm.
