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US 7,253,958 B2Granted
Tunable micro-lens arrays
AssigneeLucent Technologies Inc.
InventorsJoanna Aizenberg, Mischa Megens, Shu Yang
Life of this patent
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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.
Claims8
A method for fabricating a micro-lens array;
- comprising:
- exposing a layer of photosensitive starting medium to one or more interference patterns of multiple light beams to produce therein a concentration pattern of reaction products that tracks a time-integrated light intensity produced by the one or more interference patterns in the layer;
- curing and then washing the layer to produce a cross-linked master pattern with a surface-relief that tracks the concentration pattern of reaction products;
- and
- forming from the master pattern a replica stamp whose surface-relief is a negative copy of the surface-relief of the master pattern and includes a regular two-dimensional array of lens-shaped structures.
2 more elements
Dependencies are inferred from the claim text.