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Strain responsive concave and convex microlens arrays

Appl. Phys. Lett. 91, 251912 (2007); doi:10.1063/1.2827185

Published 20 December 2007

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Dinesh Chandra and Shu Yang
Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania 19104, USA

Pei-Chun Lin
Department of Mechanical Engineering, National Taiwan University No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
We report the fabrication of single-component, strain responsive microlens arrays with real-time tunability. The concave lens array is fabricated by patterning hard oxide layer on a bidirectionally prestretched soft elastomer, poly(dimethylsiloxane) (PDMS) followed by confined buckling upon release of the prestrain. The convex microlens array is replica molded from the concave lenses in PDMS. Due to difference in lens formation mechanisms, the two types of lenses show different tunable range of focal length in response to the applied strain: large focal length change is observed from the concave microlens array, whereas that from the convex microlens array is much smaller. ©2007 American Institute of Physics
History: Received 15 August 2007; accepted 1 December 2007; published 20 December 2007
Permalink: http://link.aip.org/link/?APPLAB/91/251912/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.79.Bh
    Optical lenses, prisms and mirrors
  • 81.40.Lm
    Deformation, plasticity, and creep
  • YEAR: 2007

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ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (10)
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