FIELD: optics.
SUBSTANCE: group of inventions relates to anti-counterfeiting optical systems. Visual display assembly is adapted for use as an anti-counterfeiting device on paper currency, product labels, and other objects. Assembly includes a film of transparent material including a first surface including an array of lenses and a second surface opposite the first surface. Assembly also includes a printed image proximate to the second surface. Printed image includes pixels of frames of one or more images interlaced relative to two orthogonal axes. Lenses of the array are nested in a plurality of parallel rows, and adjacent lenses in columns of the array are aligned to be in a single one of the rows with no offset of lenses in adjacent columns/rows. Lenses may be round-based, square-based, hexagonal or parallelogram lenses.
EFFECT: increased complexity of duplicating or copying the anti-counterfeiting device.
23 cl, 32 dwg
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