Variable-Focus Liquid Microlenses and Microlens Arrays Actuated by Thermoresponsive Hydrogels

Authors

  • L. Dong,

    1. Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA
    Search for more papers by this author
  • A. K. Agarwal,

    1. Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA
    2. Present address: Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
    Search for more papers by this author
  • D. J. Beebe,

    1. Department of Biomedical Engineering, University of Wisconsin-Madison, 1550 Engineering Drive Madison, WI 53706, USA
    Search for more papers by this author
  • H. Jiang

    1. Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA
    Search for more papers by this author

  • This research was partly supported by the U.S. Department of Homeland Security (Grant number N-00014-04-1-0659), through a grant awarded to the National Center for Food Protection and Defense at the University of Minnesota, and was partly supported by Wisconsin Alumni Research Foundation (WARF). Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

Variable-focus cylindrical liquid/liquid microlenses and spherical liquid microlens arrays formed using liquid/liquid interfaces are actuated by thermoresponsive hydrogels (see figure). The shapes of the microlenses are realized by patterning apertures with corresponding shapes. Hydrogels located within microfluidic channels regulate the focal lengths of the microlenses by expanding and contracting, in response to changes in the environmental temperature.

Ancillary