Abstract: The invention relates to a process for preparing triaryl organo borates proceeding from organoboronic esters in the presence of an n-valent cation 1/n Kn+, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Abstract: The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n Kn+, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Abstract: The invention relates to a layer construction comprising a curable protective layer C and a photopolymer layer B, to a method for producing such a layer construction, to a method for producing a hologram using such a layer construction, to a sealed holographic medium and to the use of such a layer construction for producing a hologram.

Abstract: The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n Kn+, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Abstract: The invention relates to a layer construction comprising a curable protective layer C and a photopolymer layer B, to a method for producing such a layer construction, to a method for producing a hologram using such a layer construction, to a sealed holographic medium and to the use of such a layer construction for producing a hologram.

Abstract: A production method for a polymer laminate with at least one diffraction element is simplified. The method includes the following method steps: providing a diffraction element material with a carrier film and a light-sensitive layer located thereon, and also at least one polymer layer; producing the at least one diffraction element by creating a light-diffracting layer from the light-sensitive layer, in that a light-diffracting pattern is created in the light-sensitive layer of the at least one diffraction element material; bringing together the at least one diffraction element and at least one polymer layer to form a stack of layers; and surface bonding the at least one diffraction element and the at least one polymer layer 170 by way of a lamination process, thereby forming the polymer laminate.

Abstract: Provided herein is a process for preparing triaryl organoborates of the formula 1/n Kn+R34B?—R1 (IV), where one equivalent of organoboronic ester of the formula B—R1(OR2)(OR3) (I) is initially charged together with 1/n equivalents of salt Kn+ nX? (II) and 3 equivalents of metal M in a solvent or a solvent mixture S1, 3 equivalents of a haloaromatic R4—Y (III) are added, an auxiliary L and optionally a second organic solvent or solvent mixture S2 is added and the compound 1/n Kn+ R34B?—R1 (IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.

Abstract: To simplify the production of a security element 300 with a first security feature 310 and a second security feature 320, the following method is proposed: (a) Provision of a light-sensitive film 200, which comprises at least one carrier layer 210 and in surface-to-surface contact with this a light-sensitive function layer 220; (b) Exposure of the light-sensitive film 200 at least area by area, with the formation of a pattern in the light-sensitive function layer 220, wherein the security element (300) is formed with a first security feature (310); (b?) Optional fixing of the exposed light-sensitive film; and (c) Printing of the carrier layer 210 and, as appropriate, of the protective layer 230, wherein a second security feature 320 is produced.

Abstract: Provided herein is a process for preparing triaryl organoborates proceeding from alkyl or cycloalkyl boronates in the presence of an n-valent cation 1/n Kn+ to obtain organoborates of the formula 1/n Kn+R34B?—R1 (IV), where one equivalent of organoboronic ester of the formula B—R1(OR2)(OR3) (I) is initially charged together with 1/n equivalents of salt Kn+ nX? (II) and 3 equivalents of metal M in a solvent or a solvent mixture, 3 equivalents of a haloaromatic R4—Y (III) are added, and optionally a second organic solvent water is added and the compound 1/n Kn+ R24B?—R1 (IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.

Abstract: A method for integrating a hologram into the body of a security document that has a laminated body. The method includes: providing a holographic film having a backing substrate layer and a photo layer; providing additional substrate layers; carrying out a laminating process in order to form the laminated body, the holographic film together with the additional substrate layers being collated to form a substrate layer stack and being combined, together with the additional substrate layers, in a high-pressure, high-temperature laminating method to form the laminated body. There is also described a corresponding security document body.

Abstract: The invention relates to a holographic medium containing a layer construction comprising a curable protective layer C and a photopolymer layer B, to a method for producing such a holographic medium, to a method for producing a hologram using such a holographic medium, to a sealed holographic medium and to the use of such a holographic medium for producing a hologram.

Abstract: The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.

Abstract: The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.

Abstract: The invention relates to an indirect lighting arrangement (2, 2.1, 2.2, 2.3, 2.4, 2.5) comprising at least one cylindrical waveguide (4). At least one end (12.1, 12.2) of the cylindrical waveguide (4) is designed to couple light from a first light source (1) into the cylindrical waveguide (4), and the lateral surface (10) of the cylindrical wave guide (4) has a coupling section (6) which is designed to optically couple the cylindrical waveguide (4) to an arrangeable plate-shaped waveguide (16). At least the coupling section (6) has at least one holographic optical element (8) which is designed to emit light from the cylindrical waveguide (4) into the arrangeable plate-shaped waveguide (16).

Abstract: The invention relates to a process for preparing triaryl organoborates proceeding from alkyl or cycloalkyl boronates in the presence of an n-valent cation 1/n Kn+ and to the use of these substances as co-initiator in photopolymer formulations.

Abstract: The invention relates to novel compounds which are especially suitable for use as writing monomers in holographic media. The invention further provides a photopolymer and a holographic medium comprising the inventive compounds, and an optical display, a security document and a holographic optical element comprising an inventive holographic medium.

Abstract: The invention relates to an illumination device for illuminating at least one light modulator system of a liquid crystal display, the device comprising at least one waveguide substrate for guiding at least one targeted light beam that can be coupled into the waveguide substrate. The waveguide substrate is at least in optical contact with at least one holographic optical decoupling substrate comprising a plurality of decoupling regions and a decoupling region is at least designed to decouple part of the targeted light beam in the form of a plurality of sub-beams in the direction of the light modulator system. At least one diffuser module is provided, said diffuser module being designed in such a way that at least the outermost sub-beams of two neighboring decoupling regions are at least adjacent to one another before exiting the diffuser module.

Abstract: The invention relates to naphthyl urethane acrylates particularly useful as writing monomers in photopolymer formulations for holographic media. The invention further relates to a photopolymer formulation comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, to a holographic medium comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, and also to a display comprising a holographic medium according to the invention.

Abstract: A method for integrating a hologram into the body of a security document that has a laminated body. The method includes: providing a holographic film having a backing substrate layer and a photo layer; providing additional substrate layers; carrying out a laminating process in order to form the laminated body, the holographic film together with the additional substrate layers being collated to form a substrate layer stack and being combined, together with the additional substrate layers, in a high-pressure, high-temperature laminating method to form the laminated body. There is also described a corresponding security document body.

Abstract: The invention relates to an indirect lighting arrangement (2, 2.1, 2.2, 2.3, 2.4, 2.5) comprising at least one cylindrical waveguide (4). At least one end (12.1, 12.2) of the cylindrical waveguide (4) is designed to couple light from a first light source (1) into the cylindrical waveguide (4), and the lateral surface (10) of the cylindrical wave guide (4) has a coupling section (6) which is designed to optically couple the cylindrical waveguide (4) to an arrangeable plate-shaped waveguide (16). At least the coupling section (6) has at least one holographic optical element (8) which is designed to emit light from the cylindrical waveguide (4) into the arrangeable plate-shaped waveguide (16).