Patent ID: 8314989
Filing Date: 2012-11-20
Classification: A44C,G02B

Abstract:
1. An article comprising (i) a substantially flat substrate bearing a set of substantially flat, substantially coplanar diffraction gratings, and (ii) a jewelry mounting attached to the substrate, wherein: (a) the gratings of the set are arranged so as to occupy corresponding areas of the substrate that are arranged to correspond to a two-dimensional projection of multiple, non-coplanar facets of a three-dimensional faceted gemstone; (b) each grating of the set differs from one or more other gratings of the set with respect to a corresponding grating wavevector direction so that each grating of the set differs from at least one other grating of the set with respect to a corresponding direction of dispersion of spectrally dispersed output directions of a diffracted portion of input light incident on the gratings along a given input direction; and (c) the grating wavevectors are spatially distributed among the corresponding gratings of the set so as to form two or more subsets of three or more gratings of the set along which subsets the corresponding grating wavevector direction of each grating of the subset varies monotonically with position of that grating along a given dimension of the substrate.