Design and characterization of an optical tweezers system with adaptive optic control

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dc.contributor.authorBowman, Shaun
dc.contributor.supervisorBradley, Colin
dc.date.accessioned2009-12-23T17:25:10Z
dc.date.available2009-12-23T17:25:10Z
dc.date.copyright2009en
dc.date.issued2009-12-23T17:25:10Z
dc.degree.departmentDepartment of Mechanical Engineering
dc.degree.levelMaster of Applied Science M.A.Sc.en
dc.description.abstractThe thesis details the design and characterization of an innovative optical tweezer system. Optical tweezers provide a relatively new technique for non-contact manipulation of micron-scale particles. They employ a laser beam to hold such particles at the laser’s focus. Optical tweezers are used for many scientific purposes, such as: measuring the mechanical properties of bio-molecules, cell and molecule sorting, stiction-less micro-manipulators, and fundamental research in physics. Typically, trap location has been controlled using steer-mirrors or spatial light modulators, operating without beam quality feedback. Here, an innovative trap control system has been developed, featuring a closed-loop adaptive optics system. The prototype system employs a deformable mirror and wavefront sensor to control trap position in three dimensions, while simultaneously removing beam aberrations. The performance of this system is investigated in terms of controllable range of trap motion, trap stiffness, and trap position stability.en
dc.identifier.urihttp://hdl.handle.net/1828/2022
dc.languageEnglisheng
dc.language.isoenen
dc.rightsAvailable to the World Wide Weben
dc.subjectAdaptive Opticsen
dc.subjectOptical tweezersen
dc.subjectHartmannen
dc.subjectMirroren
dc.subjectSinglular value decompositionen
dc.subjectDMMen
dc.subjecttrappingen
dc.subjectlaseren
dc.subjectwavefronten
dc.subjectphaseen
dc.subjectaberrationsen
dc.subject.lcshUVic Subject Index::Sciences and Engineeringen
dc.titleDesign and characterization of an optical tweezers system with adaptive optic controlen
dc.typeThesisen

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