Optical force model based on sequential ray tracing

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We discuss how information available from ray-tracing techniques can be used to calculate optical forces and torques on particles. A general ray-trace computer code is augmented with the polarization and irradiance distributions of the illumination and Fresnel surface coefficients to give a reasonably accurate prediction of interaction with large particles out of the focal plane. Calculations of trapping location versus nonuniform illumination conditions are compared with an experiment. Other example calculations include trapping a hemispherical lens and a two-particle trap.

Original languageEnglish (US)
Pages (from-to)1642-1650
Number of pages9
JournalApplied optics
Issue number9
StatePublished - Mar 20 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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