Cooke–Triplet tweezers: more compact, robust, and efficient optical tweezers

TY - JOUR

T1 - Cooke–Triplet tweezers

T2 - more compact, robust, and efficient optical tweezers

AU - Stangner, Tim

AU - Dahlberg, Tobias

AU - Svenmarker, Pontus

AU - Zakrisson, Johan

AU - Wiklund, Krister

AU - Oddershede, Lene Broeng

AU - Andersson, Magnus

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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.

AB - 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.

U2 - 10.1364/OL.43.001990

DO - 10.1364/OL.43.001990

M3 - Journal article

C2 - 29714728

SN - 0146-9592

VL - 43

SP - 1990

EP - 1993

JO - Optics Letters

JF - Optics Letters

IS - 9

ER -