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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9442–9457

Kinoform microlenses for focusing into microfluidic channels

Hamish C. Hunt and James S. Wilkinson  »View Author Affiliations


Optics Express, Vol. 20, Issue 9, pp. 9442-9457 (2012)
http://dx.doi.org/10.1364/OE.20.009442


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Abstract

Optical detection in microflow cytometry requires a tightly focused light beam within a microfluidic channel for effective microparticle analysis. Integrated planar lenses have demonstrated this function, but their design is usually derived from the conventional spherical lens. Compact, efficient, integrated planar kinoform microlenses are proposed for use in microflow cytometry. A detailed design procedure is given and several designs are simulated. A paraxial kinoform lens integrated with a microfluidic channel was then fabricated in a silicate glass material system and characterized for focal position and spotsize, in comparison with light emerging directly from a channel waveguide. Focal spotsizes of 5.6 μm for kinoform lenses have been measured at foci as far as 56 μm into the microfluidic channel.

© 2012 OSA

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
(170.1530) Medical optics and biotechnology : Cell analysis
(080.4225) Geometric optics : Nonspherical lens design

ToC Category:
Integrated Optics

History
Original Manuscript: February 1, 2012
Revised Manuscript: March 9, 2012
Manuscript Accepted: March 29, 2012
Published: April 10, 2012

Virtual Issues
Vol. 7, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Hamish C. Hunt and James S. Wilkinson, "Kinoform microlenses for focusing into microfluidic channels," Opt. Express 20, 9442-9457 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-9-9442


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