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Cooke-Triplet-Tweezers: More compact, robust and efficient optical tweezers
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
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2018 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 43, no 9, p. 1990-1993Article in journal (Refereed) Published
Abstract [en]

We present a versatile three-lens optical design to improve the overall compactness, efficiency, and robustness for optical tweezers based applications. The design, inspired by the Cooke–Triplet configuration, allows for continuous beam magnifications of 2–10× , and axial as well as lateral focal shifts can be realized without switching lenses or introducing optical aberrations. We quantify the beam quality and trapping stiffness and compare the Cooke–Triplet design with the commonly used double Kepler design through simulations and direct experiments. Optical trapping of 1 and 2 μm beads shows that the Cooke–Triplet possesses an equally strong optical trap stiffness compared to the double Kepler lens design but reduces its lens system length by a factor of 2.6. Finally, we demonstrate how a Twyman–Green interferometer integrated in the Cooke–Triplet optical tweezers setup provides a fast and simple method to characterize the wavefront aberrations in the lens system and how it can help in aligning the optical components perfectly.

Place, publisher, year, edition, pages
2018. Vol. 43, no 9, p. 1990-1993
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-145899DOI: 10.1364/OL.43.001990ISI: 000431179400013PubMedID: 29714728OAI: oai:DiVA.org:umu-145899DiVA, id: diva2:1191927
Available from: 2018-03-21 Created: 2018-03-21 Last updated: 2018-06-09Bibliographically approved

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Stangner, TimDahlberg, TobiasSvenmarker, PontusZakrisson, JohanWiklund, KristerAndersson, Magnus

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