<> <http://www.w3.org/2000/01/rdf-schema#comment> "The repository administrator has not yet configured an RDF license."^^<http://www.w3.org/2001/XMLSchema#string> . <> <http://xmlns.com/foaf/0.1/primaryTopic> <https://discovery.ucl.ac.uk/id/eprint/1433922> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/AcademicArticle> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/Article> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://purl.org/dc/terms/title> "Optimization of overlap uniformness for ptychography"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://purl.org/ontology/bibo/abstract> "We demonstrate the advantages of imaging with ptychography scans that follow a Fermat spiral trajectory. This scan pattern provides a more uniform coverage and a higher overlap ratio with the same number of scan points over the same area than the presently used mesh and concentric [13] patterns. Under realistically imperfect measurement conditions, numerical simulations show that the quality of the reconstructed image is improved significantly with a Fermat spiral compared with a concentric scan pattern. The result is confirmed by the performance enhancement with experimental data, especially under low-overlap conditions. These results suggest that the Fermat spiral pattern increases the quality of the reconstructed image and tolerance to data with imperfections."^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://purl.org/dc/terms/date> "2014-05-19" . <https://discovery.ucl.ac.uk/id/document/252674> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/Document> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://purl.org/ontology/bibo/volume> "22" . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://purl.org/ontology/bibo/issue> "10" . <https://discovery.ucl.ac.uk/id/publication/ext-10944087> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/Collection> . <https://discovery.ucl.ac.uk/id/publication/ext-10944087> <http://xmlns.com/foaf/0.1/name> "Optics Express"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/eprint/1433922> 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<https://discovery.ucl.ac.uk/id/person/ext-a7e20177048a35550a6f742bae0387ca> <http://xmlns.com/foaf/0.1/name> "X Huang"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/person/ext-97062199562f7de8a5d591c7a080ce49> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> . <https://discovery.ucl.ac.uk/id/person/ext-97062199562f7de8a5d591c7a080ce49> <http://xmlns.com/foaf/0.1/givenName> "Y"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/person/ext-97062199562f7de8a5d591c7a080ce49> <http://xmlns.com/foaf/0.1/familyName> "Hwu"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/person/ext-97062199562f7de8a5d591c7a080ce49> <http://xmlns.com/foaf/0.1/name> "Y Hwu"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/person/ext-4782a0c087573d3bf9c5dc29b21bbc55> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> . <https://discovery.ucl.ac.uk/id/person/ext-4782a0c087573d3bf9c5dc29b21bbc55> <http://xmlns.com/foaf/0.1/givenName> "R"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/person/ext-4782a0c087573d3bf9c5dc29b21bbc55> <http://xmlns.com/foaf/0.1/familyName> "Harder"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/person/ext-4782a0c087573d3bf9c5dc29b21bbc55> <http://xmlns.com/foaf/0.1/name> "R Harder"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://eprints.org/ontology/EPrint> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://eprints.org/ontology/ArticleEPrint> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://purl.org/dc/terms/isPartOf> <https://discovery.ucl.ac.uk/id/repository> . <https://discovery.ucl.ac.uk/id/eprint/1433922> <http://eprints.org/ontology/hasDocument> <https://discovery.ucl.ac.uk/id/document/252674> . <https://discovery.ucl.ac.uk/id/document/252674> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://eprints.org/ontology/Document> . <https://discovery.ucl.ac.uk/id/document/252674> <http://www.w3.org/2000/01/rdf-schema#label> "Optimization of overlap uniformness for ptychography (Text)"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/document/252674> <http://eprints.org/ontology/hasFile> <https://discovery.ucl.ac.uk/id/eprint/1433922/1/Robinson_Xiaojing_fermat_spiral_v1.pdf> . <https://discovery.ucl.ac.uk/id/document/252674> <http://purl.org/dc/terms/hasPart> <https://discovery.ucl.ac.uk/id/eprint/1433922/1/Robinson_Xiaojing_fermat_spiral_v1.pdf> . <https://discovery.ucl.ac.uk/id/eprint/1433922/1/Robinson_Xiaojing_fermat_spiral_v1.pdf> <http://www.w3.org/2000/01/rdf-schema#label> "Robinson_Xiaojing_fermat_spiral_v1.pdf"^^<http://www.w3.org/2001/XMLSchema#string> . 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