Kinoform microlenses for focusing into microfluidic channels

Hunt, Hamish C. and Wilkinson, James S. (2012) Kinoform microlenses for focusing into microfluidic channels. Optics Express, 20, (9), 9442-9457. (doi:10.1364/OE.20.009442).


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1364/OE.20.009442
ISSNs: 1094-4087 (print)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions : Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
ePrint ID: 337808
Accepted Date and Publication Date:
10 April 2012Published
Date Deposited: 03 May 2012 16:00
Last Modified: 22 Dec 2016 16:28

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