Patent ID: 8586285

Claim:
A method of forming a sheeting from a master tool, comprising: providing a first sheeting comprising a first array of microlenses and a photopolymerizable first material layer adjacent to the first array of microlenses; exposing the first sheeting to a radiation source to form a master tool comprising a plurality of polymerized first structured areas in the first material layer, wherein said exposing the first sheeting to the radiation source comprises directing collimated light from a laser through a lens toward the first array of microlenses such that the resulting divergent light impinges on the array of microlenses is then transmitted through the microlenses and causes a chemical change to the photopolymerizable first material layer, wherein at least some of the first structured areas comprise a portion shape in common with at least some of the other first structured areas, and wherein each first structured area is associated with one of the first array of microlenses, wherein the photopolymerizable first material layer is polymerized upon exposure to conditions resulting in simultaneous absorption of two or more photons; replicating the plurality of first structured areas using a substance that conforms to the plurality of structured areas to form a second material layer having a plurality of replicated structured areas; associating the second material layer with a second array of microlenses to form a second sheeting, wherein individual replicated structured areas are associated with individual microlenses in the second array of microlenses; wherein each of the second array of microlenses has a refractive surface that transmits light to a position of the second material layer to produce, under reflected or transmitted light, a composite image from the replicated structured areas formed within the second material layer, where the composite image appears to float above or below the second sheeting.