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  • Title: Calibration of nonspherical particles in optical tweezers using only position measurement.
    Author: Bui AA, Stilgoe AB, Nieminen TA, Rubinsztein-Dunlop H.
    Journal: Opt Lett; 2013 Apr 15; 38(8):1244-6. PubMed ID: 23595446.
    Abstract:
    Nonspherical probe particles are an attractive choice for optically-trapped scanning probe microscopy. We show that it is possible to calibrate a trap with a nonspherical particle using only position measurements, without requiring measurement of orientation, using a pseudopotential based on the position occupation probability. It is not necessary to assume the force is linear with displacement.
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