Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 7, 2007
Patent Application Number
11457187
Date Filed
July 13, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
An apparatus includes a planar substrate and an array of substantially transparent spherical micro-lenses forming a pattern. The pattern has an internal two-dimensional lattice symmetry on the planar substrate. Each micro-lens includes a convex bulge or a concave depression in a surface of the planar substrate. The micro-lenses and substrate include hydrogel that swells and contracts in a manner that is responsive to an environmental condition.
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