In situ calibration of position detection in an optical trap for active microrheology in viscous materials.

@article{Staunton2017InSC,
  title={In situ calibration of position detection in an optical trap for active microrheology in viscous materials.},
  author={Jack R Staunton and Ben Blehm and Alexus Devine and Kandice Tanner},
  journal={Optics express},
  year={2017},
  volume={25 3},
  pages={1746-1761}
}
In optical trapping, accurate determination of forces requires calibration of the position sensitivity relating displacements to the detector readout via the V-nm conversion factor (β). Inaccuracies in measured trap stiffness (k) and dependent calculations of forces and material properties occur if β is assumed to be constant in optically heterogeneous… CONTINUE READING