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http://hdl.handle.net/2445/59950
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DC Field | Value | Language |
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dc.contributor.advisor | Martín Badosa, Estela | - |
dc.contributor.author | Ribot Thunnissen, Astrid | - |
dc.date.accessioned | 2014-11-24T10:22:38Z | - |
dc.date.available | 2014-11-24T10:22:38Z | - |
dc.date.issued | 2014-06 | - |
dc.identifier.uri | http://hdl.handle.net/2445/59950 | - |
dc.description | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2014, Tutora: Estela Martín Badosa | ca |
dc.description.abstract | Beam 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. | ca |
dc.format.extent | 5 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | ca |
dc.rights | cc-by-nc-nd (c) Ribot Thunnissen, 2014 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | - |
dc.source | Treballs Finals de Grau (TFG) - Física | - |
dc.subject.classification | Modulació (Electrònica) | cat |
dc.subject.classification | Holografia | cat |
dc.subject.classification | Treballs de fi de grau | cat |
dc.subject.other | Modulation (Electronics) | eng |
dc.subject.other | Holography | eng |
dc.subject.other | Bachelor's theses | eng |
dc.title | Beam steering with spatial light modulators: Quantisation effects | eng |
dc.type | info:eu-repo/semantics/bachelorThesis | ca |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca |
Appears in Collections: | Treballs Finals de Grau (TFG) - Física |
Files in This Item:
File | Description | Size | Format | |
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TFG-Ribot-Thunnissen-Astrid.pdf | 404.75 kB | Adobe PDF | View/Open |
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