Here we propose optofluidic spherical microlenses that can change their focal distance by varying the refractive index of the liquid that composes them. These lenses are fabricated in the bulk of a polymeric mixture. Results of a characterization study of the profile of the lenses, the image forming capability, and the behavior of the focal distance as a function of the refractive index are presented. Ionic liquids are suggested as a source of liquids useful for fabricating this type of lens.
© 2009 Optical Society of America
Original Manuscript: December 16, 2008
Revised Manuscript: March 17, 2009
Manuscript Accepted: March 30, 2009
Published: April 14, 2009
Sergio Calixto, M. E. Sánchez-Morales, Francisco J. Sánchez-Marin, Martha Rosete-Aguilar, Antonio Martínez Richa, and Karla A. Barrera-Rivera, "Optofluidic variable focus lenses," Appl. Opt. 48, 2308-2314 (2009)