A device and a method for manufacturing holographic optical elements. The device includes at least two partial light beams and one interference light beam, one deformable mirror in each case per partial light beam, a control unit, which is configured to actuate the deformable mirrors to adapt a wavefront of the partial light beam, and a holographic film. The deformable mirrors are situated so as to each reflect precisely one partial light beam and to direct the reflected partial light beam on the holographic film, and the interference light beam being directed on the holographic film to interfere with the reflected partial light beams so as to simultaneously generate at least two holographic optical elements.

An embodiment of the invention relates to a method for carrying out a time-resolved interferometric measurement comprising the steps of generating at least two coherent waves, overlapping said at least two coherent waves and producing an interference pattern, measuring the interference pattern for a given exposure time, thereby forming measured interference values, and analyzing the measured interference values and extracting amplitude and/or phase information from the measured interference values. In at least one time segment, hereinafter referred to as disturbed time segment, of the expo-sure time, the interference pattern is intentionally disturbed or destroyed such that the corresponding measured interference values describe a disturbed or destroyed interference pattern. In at least one other time segment, hereinafter referred to as undisturbed time segment, of the exposure time, the interference pattern is undisturbed or at least less disturbed compared to the disturbed time segment such that the corresponding measured interference values describe an undisturbed or less disturbed interference pattern. The measured interference values that were measured during the entire given exposure time, are filtered, wherein those interference values that were measured during the at least one disturbed time segment, are reduced, suppressed or discarded. The filtered interference values are analyzed and the amplitude and/or phase information is extracted from the filtered interference values.

An embodiment of the invention relates to a method for carrying out a time-resolved interferometric measurement comprising the steps of generating at least two coherent waves, overlapping said at least two coherent waves and producing an interference pattern, measuring the interference pattern for a given exposure time, thereby forming measured interference values, and analyzing the measured interference values and extracting amplitude and/or phase information from the measured interference values. In at least one time segment, hereinafter referred to as disturbed time segment, of the exposure time, the interference pattern is intentionally disturbed or destroyed such that the corresponding measured interference values describe a disturbed or destroyed interference pattern. In at least one other time segment, hereinafter referred to as undisturbed time segment, of the exposure time, the interference pattern is undisturbed or at least less disturbed compared to the disturbed time segment such that the corresponding measured interference values describe an undisturbed or less disturbed interference pattern. The measured interference values that were measured during the entire given exposure time, are filtered, wherein those interference values that were measured during the at least one disturbed time segment, are reduced, suppressed or discarded. The filtered interference values are analyzed and the amplitude and/or phase information is extracted from the filtered interference values.

A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.

A color image display device comprising arrays of structural color pixels, where said structural color pixels may be formed on a single substrate layer or multiple substrate layers and are patterned by selective material deposition to display a color image in accordance with input color images or patterns. The structural color pixels comprise a plurality of microstructures and/or nanostructures, including without limitation, diffraction gratings, sub-wavelength structures, to display colors in red, green, blue in RGB color space or cyan, magenta, yellow in CMY color space. Examples include methods of activating and/or deactivating structural pixels using selective material deposition onto at least one layer of the color display device to form a color image. Further examples include product labels, authentication devices and security documents carrying customized or personalized information and methods for their manufacture.

A description is given of a document with a hologram as a security feature, in particular an identity card (12), consisting of a polycarbonate card body (10), which has a volume hologram label (2, 9) embedded therein. A description is additionally given of a method for producing the document, in which volume hologram labels (2) arranged on a carrier sheet are brought into contact with adhesive regions (4) on a thermoplastic sheet (5.1), the adhesive surfaces are cured and the carrier sheet is then removed. A second plastics sheet (5.2) is then adhesively bonded onto the first plastics sheet (5.1), bearing the hologram labels, using a second adhesive (7) in the region of the hologram labels (2) to form a two-layered sheet composite (6) which, finally, is laminated, together with further thermoplastic sheets, in a card-lamination press, under the action of pressure and temperature, to give a card body (10), individual identity cards (12) being punched out.

An optical security device is disclosed which includes a diffraction layer having a plurality of diffraction elements and a high refractive index layer, wherein the high refractive index layer is applied on the diffraction layer such that selected regions of the diffraction layer have the corresponding diffraction elements partially uncovered by the high refractive index layer and other regions are substantially covered by the high refractive index layer. Accordingly, the optical security device has a first security feature associated with the diffraction layer and a second security feature associated with the high refractive index layer. An image is viewable from the regions of the high refractive index layer, either, covertly by placed an index matched item over the device or, overtly, through selection of the thickness of the high refractive index layer.

A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.

A color image display device comprising arrays of structural color pixels, where said structural color pixels may be formed on a single substrate layer or multiple substrate layers and are patterned by selective material deposition to display a color image in accordance with input color images or patterns. The structural color pixels comprise a plurality of microstructures and/or nanostructures, including without limitation, diffraction gratings, sub-wavelength structures, to display colors in red, green, blue in RGB color space or cyan, magenta, yellow in CMY color space. Examples include methods of activating and/or deactivating structural pixels using selective material deposition onto at least one layer of the color display device to form a color image. Further examples include product labels, authentication devices and security documents carrying customized or personalized information and methods for their manufacture.

A plate for creating holograms or other light-bending or diffractive microstructures on web-shaped or sheet-shaped printing substrates includes a relief for a relief printing process. The relief is formed of one or more raised dies and one or more adjacent depressions. A non-metallic microrelief for printing or embossing the microstructure is provided exclusively on the dies. The plate may be manufactured in a process in which a primary plate has a negative of the microrelief and the microrelief is created by molding the negative.