Spatial filtering dark hollow beams

We describe the synthesis of diffraction free beams and dark hollow beams with features easily tunable using a holographic transmittance. The hologram is generated by interfering two zero order Bessel beams with non-common axis. Spatial filtering techniques are implemented by controlling the illumination during the reconstruction process. The experimental results are for illumination similar to the one used in the recording process, obtaining a set of diffracting free beams. One of these beams propagates quasi-parallel to the surface hologram. For illumination with a plane wave we obtain a dark hollow beam propagating in the same direction as the reconstructions beam. Experimental results are shown in both cases.