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.

A static-image augmented privacy display, mode-switchable privacy display system, and method provide a private image to a first view zone and a static image to a second view zone. The static-image augmented privacy display includes a privacy backlight configured to provide directional emitted light to the first view zone and an array of light valves configured to modulate the directional emitted light to provide a private image within the first view zone. The static-image augmented privacy display also includes a static display layer configured to provide a static image in a second view zone. The mode-switchable privacy display includes a broad-angle backlight configured to provide broad-angle emitted light to both a first view zone and a second view zone during a shared mode, a shared image being provided by modulation of the broad-angle emitted light using the light valve array.

An optical identifier including a recording surface, a plurality of deflection cells each of which has recorded thereon a range in which light to be diffracted is deflected, at least one spatial phase modulator which fills a space between the deflection cells on the recording surface, and a deposition layer which covers part or all of the recording surface. The deflection cells has a spatial frequency expressed in a form of a relief structure and are discretely formed on the recording surface at regular intervals away from each other. A variable color image is recorded by pixels defined by the deflection cells. The spatial phase modulator has thereon a distribution of phase differences recorded in a form of heights of the relief structure. The spatial phase modulator modulates a phase of light outputted from a point light source and displays a reproduced image.

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.

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 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.

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.

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 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.

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.