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Proceedings Paper

Real-time reconfigurable counter-propagating beam-traps
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Paper Abstract

We present a versatile technique that enhances the axial stability and range in counter-propagating (CP) beam-geometry optical traps. It is based on computer vision to track objects in unison with software implementation of feedback to stabilize particles. In this paper, we experimentally demonstrate the application of this technique by real-time rapid repositioning coupled with a strongly enhanced axial trapping for a plurality of particles of varying sizes. Also exhibited is an interesting feature of this approach in its ability to automatically adapt and trap objects of varying dimensions which simulates biosamples. By working on differences rather than absolute values, this feedback based technique makes CPtrapping nullify many of the commonly encountered pertubations such as fluctuations in the laser power, vibrations due to mechanical instabilities and other distortions emphasizing its experimental versatility.

Paper Details

Date Published: 27 August 2010
PDF: 8 pages
Proc. SPIE 7762, Optical Trapping and Optical Micromanipulation VII, 77620T (27 August 2010); doi: 10.1117/12.859691
Show Author Affiliations
Sandeep Tauro, Technical Univ. of Denmark (Denmark)
Andrew Bañas, Technical Univ. of Denmark (Denmark)
Darwin Palima, Technical Univ. of Denmark (Denmark)
Jesper Glückstad, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 7762:
Optical Trapping and Optical Micromanipulation VII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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