OPTICAL PRODUCTS, MASTERS FOR FABRICATING OPTICAL PRODUCTS, AND METHODS FOR MANUFACTURING MASTERS AND OPTICAL PRODUCTS
In certain embodiments, a master for fabricating an optical product is disclosed. For example, the optical product can be configured to be an anti-counterfeit feature such as a patch, a window, or a thread on a banknote. The optical product can be configured, when illuminated, to reproduce by reflected or refracted light, a 3D image of at least a part of a 3D object. The master can include a first surface and a second surface opposite the first surface. The second surface can include a plurality of portions. Each portion can correspond to a point on a surface of the 3D object. Each portion can include features corresponding to non-holographic elements on the optical product. A gradient in the features can correlate to an inclination of the surface of the 3D object at the corresponding point. An orientation of the features can correlate to an orientation of the surface of the 3D object at the corresponding point.
1 .- 115 . (canceled)
116 . An optical product configured, when illuminated, to reproduce by reflected light, a 3D image of at least a part of a 3D object, said optical product comprising:
a first surface; and
a second surface opposite said first surface, said second surface comprising a plurality of portions, each portion corresponding to a point on a surface of said 3D object, each portion comprising non-holographic features configured to produce at least part of said 3D image of said 3D object without relying on diffraction,
wherein a gradient in said non-holographic features correlates to an inclination of said surface of said 3D object at said corresponding point, and
wherein an orientation of said non-holographic features correlates to an orientation of said surface of said 3D object at said corresponding point.
117 . The optical product of claim 116 , wherein a majority of said plurality of portions comprises one or more non-holographic features having different orientations as one or more non-holographic features in surrounding adjacent portions.
118 . The optical product of claim 116 , wherein said second surface further comprises additional features that when illuminated, do not reproduce a part of said 3D object.
119 . The optical product of claim 116 , wherein said inclination comprises a polar angle from a first reference line of said 3D object, and said orientation comprises an azimuth angle from a second reference line orthogonal to said first reference line.
120 . The optical product of claim 116 , wherein said optical product is configured to provide authenticity verification on an item for security.
121 . The optical product of claim 120 , wherein said item for security comprises currency, a credit card, a debit card, a passport, a driver's license, an identification card, a document, a tamper evident container or packaging, or a bottle of pharmaceuticals.
122 . The optical product of claim 116 , wherein said optical product is an embedded feature, a laminated feature, a hot stamp feature, windowed thread feature, or a transparent window feature.
123 . The optical product of claim 116 , wherein said 3D object comprises an irregularly shaped object.
124 . The optical product of claim 116 , wherein said 3D object comprises a non-symmetrical shaped object.
125 . The optical product of claim 124 , wherein said 3D object comprises one or more animals, humans, plants, trees, landscapes, buildings, cars, boats, airplanes, bicycles, furniture, office equipment, drinks, personal care items, or flags.
126 . The optical product of claim 116 , wherein said one or more non-holographic features comprise one or more mirrors configured to produce a mirror-like image by reflecting light.
127 . The optical product of claim 116 , wherein said 3D object comprises an object in nature.
128 . The optical product of claim 116 , wherein said 3D object comprises a man-made object.