We present a general computational method of determining radiation pressure forces and torques exerted on small particles by a converging beam of light. This method, based on a ray optics model of optical trapping, allows time-series dynamic motion analysis to be performed on nonspherical objects that are initially positioned off the optical axis with arbitrary orientation. Comparison tests of computer simulation with experimental results prove that the proposed model can be used to predict complicated trapping behavior of microfabricated objects.
© 2000 Optical Society of America
Original Manuscript: November 12, 1999
Revised Manuscript: May 15, 2000
Published: August 20, 2000
Jun-Sik Kim and Seung-Woo Kim, "Dynamic motion analysis of optically trapped nonspherical particles with off-axis position and arbitrary orientation," Appl. Opt. 39, 4327-4332 (2000)