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Proceedings Paper

Transport and separation of microspheres with lensless imaging technique
Author(s): Y. Y. Sun; J. Bu; L. S. Ong; X.-C. Yuan
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Paper Abstract

Authors propose an on-chip solution for continuous transport and separation of microspheres based on a lensless imaging technique, Talbot effect. High contrast intensity pattern of optical lattice is created at Talbot distance within the microfluidic chamber. The advantages of this proposed method include large-scale, power-efficient, compact, simple configuration etc. The binary two-dimensional chessboard grating was designed and fabricated. Experimentally regular array of microspheres were trapped with static optical lattice, while the translation of group of spheres were demonstrated with dynamic optical lattice. And continuous separation of microspheres with different sizes was realized. Finally, the experimental result of passive guiding of a group of spheres on a tilted asymmetric optical landscape was introduced.

Paper Details

Date Published: 7 September 2007
PDF: 7 pages
Proc. SPIE 6644, Optical Trapping and Optical Micromanipulation IV, 66440S (7 September 2007); doi: 10.1117/12.739646
Show Author Affiliations
Y. Y. Sun, Nanyang Technological Univ. (Singapore)
J. Bu, Nanyang Technological Univ. (Singapore)
L. S. Ong, Nanyang Technological Univ. (Singapore)
X.-C. Yuan, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 6644:
Optical Trapping and Optical Micromanipulation IV
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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