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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 12 — Nov. 10, 2009

A high numerical aperture, polymer-based, planar microlens array

Anurag Tripathi, Trushal Vijaykumar Chokshi, and Nikos Chronis  »View Author Affiliations


Optics Express, Vol. 17, Issue 22, pp. 19908-19918 (2009)
http://dx.doi.org/10.1364/OE.17.019908


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Abstract

We present a novel microfabrication approach for obtaining arrays of planar, polymer-based microlenses of high numerical aperture. The proposed microlenses arrays consist of deformable, elastomeric membranes that are supported by polymer-filled microchambers. Each membrane/microchamber assembly is converted into a solid microlens when the supporting UV–curable polymer is pressurized and cured. By modifying the microlens diameter (40-60 μm) and curing pressure (7.5-30 psi), we demonstrated that it is possible to fabricate microlenses with a wide range of effective focal lengths (100–400 μm) and numerical apertures (0.05-0.3). We obtained a maximum numerical aperture of 0.3 and transverse resolution of 2.8 μm for 60 μm diameter microlenses cured at 30 psi. These values were found to be in agreement with values obtained from opto-mechanical simulations. We envision the use of these high numerical microlenses arrays in optical applications where light collection efficiency is important.

© 2009 OSA

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: July 29, 2009
Revised Manuscript: October 6, 2009
Manuscript Accepted: October 6, 2009
Published: October 19, 2009

Virtual Issues
Vol. 4, Iss. 12 Virtual Journal for Biomedical Optics

Citation
Anurag Tripathi, Trushal Vijaykumar Chokshi, and Nikos Chronis, "A high numerical aperture, polymer-based, planar microlens array," Opt. Express 17, 19908-19918 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-22-19908


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