Temperature compensation analysis of liquid lens for variable-focus control

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Abstract

In this work, a fabrication and temperature compensation analysis and electrowetting for the liquid lenses is proposed. The unique capability of controlling the lens profile during the electrowetting fabrication processes is successfully demonstrated for different ambient temperature environment. For a lens fabricated on a hydrophobic Teflon layer, it is found that when the applied voltage is increased, the focal length increases, and the curvature decreases. One challenge for the liquid lens is operating temperature range. Due to the environment temperature change, the ability of controlling the lens profile is analyzed and measured. The description of change in contact angle corresponding to the variation of ambient temperature is derived. Based on this description, we firstly derive the control of voltage vs. temperature for a fixed dioptric power. The control of lens during a focusing action was studied by observation of the image formed by the light through the transparent bottom of ITO glass. Under several conditions of ambient temperature change, capability of controlling the lens profile for a fixed focus is successfully demonstrated by experiments.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6111
DOIs
Publication statusPublished - 2006 May 3
EventReliability, Packaging, Testing, and Characterization of MEMS/MOEMS V - San Jose, CA, United States
Duration: 2006 Jan 252006 Jan 26

Other

OtherReliability, Packaging, Testing, and Characterization of MEMS/MOEMS V
CountryUnited States
CitySan Jose, CA
Period06-01-2506-01-26

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Chen, S. J., Tai, T. L., & Shen, C. H. (2006). Temperature compensation analysis of liquid lens for variable-focus control. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6111). [61110S] https://doi.org/10.1117/12.644456