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Tunable optical active elements

  • US 7,920,330 B2
  • Filed: 02/06/2007
  • Issued: 04/05/2011
  • Est. Priority Date: 02/07/2006
  • Status: Expired due to Fees
First Claim
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1. An optical active element comprising:

  • an intermediate layer made out of a deformable material and mechanically interconnected to a first and a second driving plate arranged in general opposite to each other on opposite sides of and partially covering the intermediate layer such that a local compression of the intermediate layer by the driving plates causes a local reduction of the thickness of the intermediate layer in a first direction and at least one thereto by the poisson'"'"'s ratio of the material of the intermediate layer related secondary deformation of the intermediate layer in a second direction whereby the secondary deformation causes a change in the optical behavior of the optical active area,wherein the intermediate layer is attached to a holding means in a prestretched manner such that the intermediate layer does not deform out of plane during operation.

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