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Dynamicsteeringbeamsforefficientforcemeasurementinopticalmanipulation
Anefficientandinexpensivemethodthatusesaglassplatemountedontoamotorizedrotatingstageasabeam-steeringdeviceforthegenerationofdynamicopticaltrapsisreported.Forceanalysisrevealsthattherearedragandtrappingforcesimposedonthebeadintheoppositedirections,respectively,inaviscousmedium.Thetrappedbeadwillberotatedfollowingthebeam’smotionbeforeitreachesthecriticalescapevelocitywhenthedragforceisequaltotheopticaltrappingforce.The