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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 11, Iss. 4 — Dec. 25, 2007
  • pp: 162–172

Maximizing the Workspace of Optical Tweezers

Sun-Uk Hwang and Yong-Gu Lee  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 11, Issue 4, pp. 162-172 (2007)


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Abstract

Scanning Laser Optical Tweezers(SLOT) is an optical instrument frequently employed on a microscope with laser being delivered through its various ports. In most SLOT systems, a mechanical tilt stage with a mirror on top is used to dynamically move the laser focal point in two-dimensions. The focal point acts as a tweezing spot, trapping nearby microscopic objects. By adding a mechanical translational stage with a lens, SLOT can be expanded to work in three-dimensions. When two mechanical stages operate together, the focal point can address a closed three-dimensional volume that we call a workspace. It would be advantageous to have a large workspace since it means one can trap and work on multiple objects without interruptions, such as translating the microscope stage. However, previous studies have paid less consideration of the volumetric size of the workspace. In this paper, we propose a new method for designing a SLOT such that its workspace is maximized through optimization. The proposed method utilizes a matrix based ray tracing method and genetic algorithm(GA). To demonstrate the performance of the proposed method, experimental results are shown.

© 2007 Optical Society of Korea

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(080.2720) Geometric optics : Mathematical methods (general)
(080.2730) Geometric optics : Matrix methods in paraxial optics
(080.2740) Geometric optics : Geometric optical design

History
Original Manuscript: October 30, 2007
Revised Manuscript: November 26, 2007
Published: December 25, 2007

Citation
Sun-Uk Hwang and Yong-Gu Lee, "Maximizing the Workspace of Optical Tweezers," J. Opt. Soc. Korea 11, 162-172 (2007)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-11-4-162


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