Patent ID: 8537469

Claim:
A lens array for imaging a plurality of image elements in an object plane, the lens array comprising: a plurality of lenslets formed in or on one side of a transparent or translucent material with the image elements disposed on the opposite side, wherein the lens array has a gauge thickness corresponding to a distance from an apex of each lenslet, of the plurality of lenslets, to the object plane, wherein each lenslet has a set of lens parameters, wherein at least one of the gauge thickness at least one lens parameter of the set of lens parameters is optimised such that either: each lenslet of the plurality of lenslets has an effective focal width in the object plane which is substantially equal to the size of the image elements in the object plane, or each lenslet of the plurality of lenslets has an effective focal width in the object plane which] varies from the size of the image elements by a predetermined amount.