Martín Badosa, EstelaRibot Thunnissen, Astrid2014-11-242014-11-242014-06https://hdl.handle.net/2445/59950Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2014, Tutora: Estela Martín BadosaBeam steering can be achieved by sending holograms to a phase-only spatial light modulator (SLM). The use of holograms, defined by linear phases, induce a one dimensional transverse shift of the beam spot at the focal plane of a lens. An SLM is formed by N pixels and uses a limited number of grey levels, M. These limitations produce the quantisation of the phase values introduced on the incoming beam and decrease the accuracy on spot positioning. We have built a system in which a laser beam is focused by a lens after being reflected by an SLM. Different positions of the focal spot have been captured by a camera and accurately determined by image processing. Measurements were done with N=100 and M=16. We proved that quantisation effects are not relevant in most of the positions, except for certain locations, which produce such errors on spot positioning that need to be avoided.5 p.application/pdfengcc-by-nc-nd (c) Ribot Thunnissen, 2014http://creativecommons.org/licenses/by-nc-nd/3.0/es/Modulació (Electrònica)HolografiaTreballs de fi de grauModulation (Electronics)HolographyBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess