Patent ID: 7978416

Claim:
A method of forming a microlens array, comprising: modifying a surface of an optically transparent elastomeric layer to form a plurality of optically transparent superlayer islands; wherein the elastomeric layer comprises a crosslinked polymer having a first flexural modulus; and wherein the superlayer islands comprise a modification reaction product having a second flexural modulus greater than the first flexural modulus; swelling the elastomeric layer with a polymerizable monomer, thereby causing buckling of the superlayer islands; and polymerizing the polymerizable monomer, thereby stabilizing the buckling of the superlayer islands; wherein each buckled superlayer island independently has a diameter of about 500 nanometers to about 500 micrometers and a radius of curvature such that a ratio of the radius of curvature to the diameter is about 0.5 to about 10.