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Electrically tunable binary phase Fresnel lens based on a dielectric elastomer actuator




We propose and demonstrate an all-solid-state tunable binary phase Fresnel lens with electrically controllable focal length. The lens is composed of a binary phase Fresnel zone plate, a circular acrylic frame, and a dielectric elastomer (DE) actuator which is made of a thin DE layer and two compliant electrodes using silver nanowires. Under electric potential, the actuator produces in-plane deformation in a radial direction that can compress the Fresnel zones. The electrically-induced deformation compresses the Fresnel zones to be contracted as high as 9.1 % and changes the focal length, getting shorter from 20.0 cm to 14.5 cm. The measured change in the focal length of the fabricated lens is consistent with the result estimated from numerical simulation.

Author(s): Suntak Park and Bongje Park and Saekwang Nam and Sungryul Yun and Seung Koo Park and Seongcheol Mun and Jeong Mook Lim and Yeonghwa Ryu and Seok Ho Song and Ki-Uk Kyung
Journal: Optics Express
Volume: 25
Number (issue): 20
Pages: 23801--23808
Year: 2017
Month: October
Publisher: OSA

Department(s): Haptic Intelligence
Bibtex Type: Article (article)
Paper Type: Journal

Digital: True
DOI: 10.1364/OE.25.023801
State: Published
URL: http://www.opticsexpress.org/abstract.cfm?URI=oe-25-20-23801


  title = {Electrically tunable binary phase Fresnel lens based on a dielectric elastomer actuator},
  author = {Park, Suntak and Park, Bongje and Nam, Saekwang and Yun, Sungryul and Park, Seung Koo and Mun, Seongcheol and Lim, Jeong Mook and Ryu, Yeonghwa and Song, Seok Ho and Kyung, Ki-Uk},
  journal = {Optics Express},
  volume = {25},
  number = {20},
  pages = {23801--23808},
  publisher = {OSA},
  month = oct,
  year = {2017},
  url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-25-20-23801},
  month_numeric = {10}