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Optical lens displacement systems

  • US 8,054,566 B2
  • Filed: 12/10/2007
  • Issued: 11/08/2011
  • Est. Priority Date: 03/21/2005
  • Status: Active Grant
First Claim
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1. A lens displacement system comprising:

  • a lens unit comprising at least one lens positioned along a focal axis, the lens unit having a linear bearing surface;

    an electroactive polymer actuator positioned adjacent the lens unit wherein activation of the actuator moves the lens unit along the focal axis;

    a linear guide adjacent to the linear bearing surface for maintaining the position of the lens unit;

    multiple lens stages, each stage comprising a lens,wherein the lens unit is carried by a lens driver mechanism whereby activation of the actuator moves the lens driver mechanism, wherein the lens unit comprises an afocal lens assembly and wherein the lens driver mechanism translates the multiple stages at different rates.

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