An apparatus for producing an optically variable film includes a laser configured to emit a beam, a telescoping lens section having a first lens and a second lens spaced apart by a first distance and an interferometer configured to direct the beam toward a workpiece. The laser may be operated at a predetermined power level and the first and second lenses are sized and spaced relative to one another to direct the beam onto the workpiece at about 200-230 dots per inch. The workpiece may include a polyethylene terephthalate (PET) layer configured to be ablated by the beam, forming a microstructure in the surface of the layer. The microstructure may be randomized and used to present non-chroma visual effects.

A method for producing a volume hologram with at least one first area in a first color and at least one second area in a second color includes, providing a volume hologram layer made of a photopolymer; arranging a master with a surface structure on the volume hologram layer; exposing the master using coherent light, wherein light which is incident on at least one first partial area of the surface of the master is diffracted or reflected in the direction of the at least one first area of the volume hologram layer and light which is incident on at least one second partial area of the surface of the master is diffracted or reflected in the direction of the at least one second area of the volume hologram, and wherein the light diffracted or reflected by the first and second partial areas differs in at least one optical property.

An authentication medium includes a sheet-like laminate sheet; a first region that is formed on the laminate sheet and where personal identification information is recorded; and a second region that is formed on the laminate sheet and has a hologram structure where check data associated with first individual information is recorded.

An image display device includes image cells arranged two-dimensionally. Each image cell has a hologram layer. The hologram layer includes a diffraction grating in which a one-dimensional grating pattern extending in a first direction is repeated in a second direction perpendicular to the first direction. Among the plurality of image cells, two or more image cells that are in a row in the second direction and correlated to one color constitute one image cell group. The image cell group includes a section in which the spatial frequency of the diffraction grating is proportionately small as the distance in the second direction from one end of the image cell group increases such that, while a viewpoint is positioned at a predetermined angle relative to an image display device, the two or more image cells constituting the image cell group display the same color as each other.

An image display that is to be transferred from a support onto a substrate and displays an image including personal information, according to a possible embodiment, includes: a base layer releasably supported by the support, having a light-transmitting property, a first pattern including a hologram and/or diffraction grating and transferred onto a main surface of the base layer, the first pattern displaying a first image including at least a piece of the personal information, the first pattern including dot-shaped portions, each center of the dot-shaped portions being located on a lattice point of a virtual planer lattice; and a second pattern displaying a second image, comprising an ink, and transferred onto the main surface of the base layer. At least a part of the first pattern and at least a part of the second pattern are juxtaposed on a same plane parallel to the main surface of the base layer.

A display member including a light transmission layer having a principal surface including a plurality of pixels; and a metal layer covering the principal surface, one or more of the pixels include a first region, one or more of the pixels include a second region, the first region has a plurality of first grooves or ridges each of which extends in a longitudinal direction in a first angle range of about 10 to +10 with respect to a first direction, the second region has a plurality of second grooves or ridges each of which extends in a longitudinal direction in a second angle range of about 65 to +65 with respect to a second direction perpendicular to the first direction, the second grooves or ridges form a diffraction structure, and the metal layer does not cover at least part of the first region and covers the second region.

An image display is to be transferred from a support onto a substrate and displays an image including personal information. The image display includes a base layer releasably supported by the support and having a light-transmitting property, and an image display layer including a hologram and/or diffraction grating and transferred onto the base layer by a thermal transfer method using a thermal head. The image display layer displays an image including at least a piece of the personal information. An individual authentication medium including the image display, and manufacturing methods of the image display and individual authentication medium are also described.

An optical device with ordered scatterer arrays for secure identity and a method of producing the same This invention discloses a method for configurable spatial control and modification of optically active resonantly coupled scatterer arrays to produce identifiable security features and a corresponding photonic secure identity device. The invention comprises at least the steps of (i) producing a deposition template from said master stamp, (ii) synthesis of a plasmonic particle colloid, (iii) producing an optically active, two-dimensional security tag template using self-assembly of said particles on said deposition template, (iv) producing a customized secure identity device from said security tag template by selective removal or modification of optical properties using ultrashort laser pulses. The produced customized plasmonic-photonic device can then be used as secure identity and anti-counterfeiting means. The device exploits customized spatial control and modification of optically active plasmonic particle arrays demonstrating surface lattice resonance optical signature to produce easily identifiable security features.

An image display according to an embodiment includes a first image-displaying portion that displays first information about a certain object as a first image of object color, and a second image-displaying portion that displays second information about the object as a second image of structural color provided by a relief structure, the relief structure including at least one structure selected from the group consisting of diffraction grating, hologram, and light-scattering structure having an anisotropic light-scattering property. According to an example, the object is a person, and the first image includes a facial image of the person. A labeled article according to another embodiment includes the image display, and a substrate supporting the image display.

The present disclosure relates to apparatuses and methods for performing in-line lens-free digital holography of objects. At least one embodiment relates to an apparatus for performing in-line lens-free digital holography of an object. The apparatus includes a point light source adapted for emitting coherent light. The apparatus also includes an image sensing device adapted and arranged for recording interference patterns resulting from interference from light waves directly originating from the point light source and object light waves. The object light waves originate from light waves from the point light source that are scattered or reflected by the object. The image sensing device comprises a plurality of pixels. The point light source comprises a broad wavelength spectrum light source and a pinhole structure. The image sensing device comprises a respective narrow band wavelength filter positioned above each pixel that filters within a broad wavelength spectrum of the point light source.