?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F603%2F&rft.title=High+speed+video+capture+for+mobile+phone+cameras&rft.creator=Burke%2C+M.&rft.creator=Burns%2C+S.&rft.creator=Cook%2C+S.P.&rft.creator=Dellar%2C+P.J.&rft.creator=Dewynne%2C+J.&rft.creator=Hickey%2C+C.&rft.creator=Hjorth%2C+P.G.&rft.creator=Lee%2C+W.T.&rft.creator=Melnik%2C+A.&rft.creator=Moroney%2C+K.&rft.creator=Murphy%2C+E.&rft.creator=O'Callaghan%2C+R.&rft.creator=Vynnycky%2C+M.&rft.subject=Machines+%2F+Production&rft.description=We+consider+an+electromechanical+model+for+the+operation+of+a+voice+coil+motor+in+a+mobile+phone+camera%2C+with+the+aim+of+optimizing+how+a+lens+can+be+moved+to+a+desired+focusing+motion.+Although+a+methodology+is+developed+for+optimizing+lens+shift%2C+there+is+some+concern+about+the+experimentally-determined+model+parameters+that+are+at+our+disposal.+Central+to+the+model+is+the+value+of+the+estimated+magnetic+force+constant%2C+Kf%3A+its+value+determines+how+far+it+is+actually+possible+to+move+lens%2C+but+it+appears+that%2C+from+the+value+given%2C+it+would+not+be+possible+to+shift+the+lens+through+the+displacements+desired.+Furthermore%2C+earlier+experiments+have+also+estimated+the+value+of+the+back+EMF+constant%2C+Kg+%2C+to+be+roughly+five+times+greater+than+Kf%2C+even+though+we+present+two+theoretical+arguments+that+show+that+Kf+%3D+Kg%3A+a+conclusion+supported+by+readily-available+manufacturers%E2%80%99+data.&rft.date=2012&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F603%2F1%2FAnalog_Report_ESGI87.pdf&rft.identifier=++Burke%2C+M.+and+Burns%2C+S.+and+Cook%2C+S.P.+and+Dellar%2C+P.J.+and+Dewynne%2C+J.+and+Hickey%2C+C.+and+Hjorth%2C+P.G.+and+Lee%2C+W.T.+and+Melnik%2C+A.+and+Moroney%2C+K.+and+Murphy%2C+E.+and+O'Callaghan%2C+R.+and+Vynnycky%2C+M.++(2012)+High+speed+video+capture+for+mobile+phone+cameras.++%5BStudy+Group+Report%5D+++++