Covestro Deutschland Ag

Bayer Materialscience Ag

Bayer Intellectual Property Gmbh

Lg Display Co., Ltd.

Other

Allnex IP S.a.r.l.

Stratasys, Inc.

Hella Gmbh & Co Kgaa

Covestro Intellectual Property Gmbh & Co. Kg

Thomas Fäcke

Friedrich-Karl Bruder

Dennis Hönel

Marc-Stephan Weiser

Thomas Rölle

Horst Berneth

Günther Walze

Rainer Hagen

Jan Weikard

Wolfgang Fischer

Dirk Achten

Hans-Josef Laas

Serguei Kostromine

Hyungseok Bang

Jörg Hofmann

Sebastian Dörr

Heinz Pudleiner

Klaus Lorenz

Michael Ludewig

Roland Wagner

Joachim Petzoldt

Thomas Büsgen

Martin Mügge

Georgios Tziovaras

Peter Thometzek

Seungman Ryu

Guensik Lee

Andrey Nikolaevich Putilin

Robert Maleika

Werner Hoheisel

Carsten Hohmann

Jörg Büchner

Thomas Roelle

Dirk Dijkstra

Florian Johannes Stempfle

Bettina Mettmann

Christoph Tomczyk

Christian Diedrich

Ute Flemm

Eun Soo Kim

Heejin Im

Kira Planken

Stefan Janke

Pantea Nazaran

Roland Künzel

Nicolas Stöckel

Ting Liu

Dennis Honel

Nicolas Stoeckel

Yong Seok Hwang

Sascha Tadjbach

Karl Vetterle

Frank-Stefan Stern

Enrico Orselli

Christian Rewitz

Daniel Hentschel

Benjamin Herzberg

Heinz-Guenter Auweiler

Heinz-Günter Auweiler

Dennis HÖNEL

François Deuber

Rölle Thomas

Marc-Stephen Weiser

The invention relates to a scaled holographic medium comprising a layer construction B'-C1&#x2032;-C2&#x2032;, to a process for producing the sealed holographic medium, to a kit of parts, to a layer construction comprising a protective layer and a substrate layer and to the use thereof.

System consisting of two UV-curing dry-transfer coating layers for the protection of a hologram in a photopolymer film composite

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.

Film structure containing a photopolymer layer for holographic exposure and a coating layer of high resistance

The invention relates to a process for producing an optical casting comprising at least one volume-holographic optical element by means of at least one casting operation, the process comprising the following steps:

Method for producing an optical cast body having a holographic optical element, and optical cast body

The invention relates to an apparatus () for producing volume reflection holograms with substrate-guided reconstruction beams, comprising:

Device and method for the industrial production of volume reflection holograms with substrate-guided reconstruction beams

A method for recording a plurality of scatter volume holograms in a photopolymeric recording medium, the method including at least the following steps providing a first laser light source, providing a photopolymeric recording medium including a substrate and a photoactive layer, wherein the photopolymeric recording medium has an index modulation &#x394;n of at least 0.04 and a thickness d of the photoactive layer of at least 25 &#x3bc;m, and irradiating the photopolymeric recording medium with the first laser light beam generated by the first laser light source with a minimum irradiation energy dosage of 3*D, Dbeing the inhibition dosage of the photoactive layer.

Method for producing a beam shaping holographic optical element

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.

Selection method for additives in photopolymers

An autostereoscopic 3D display device is disclosed. The device includes a first light source and a second light source configured to alternately generate light and a light guide panel arranged to guide the light from the first light source in a first direction as a first light beam and the light from the second light source in a second direction as a second light beam. In the device, a stack of a plurality of holographic optical elements is configured to converge the first light beam and the second light beam from the light guide panel. The stack of the plurality of holographic optical elements may include at least one first holographic optical element and at least one second holographic optical element.

Autostereoscopic 3D display device using holographic optical elements

The invention relates to an indirect lighting arrangement () comprising at least one cylindrical waveguide (). At least one end () of the cylindrical waveguide () is designed to couple light from a first light source () into the cylindrical waveguide (), and the lateral surface () of the cylindrical wave guide () has a coupling section () which is designed to optically couple the cylindrical waveguide () to an arrangeable plate-shaped waveguide (). At least the coupling section () has at least one holographic optical element () which is designed to emit light from the cylindrical waveguide () into the arrangeable plate-shaped waveguide ().

Indirect lighting arrangement, and method for producing an indirect lighting arrangement

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.

Moisture-stable holographic media

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.

Illumination device for a liquid crystal display

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.

Naphthyl acrylates as writing monomers for photopolymers

The invention relates to a photopolymer formulation comprising a component reactive toward isocyanates, a polyisocyanate component, a writing monomer and a photoinitiator containing at least one dye and a coinitiator, characterized in that the coinitiator contains at least one substance of the formula (Ia)  The invention further provides a process for preparing the specific coinitiators and the coinitiators obtainable by this process, and additionally a process for producing a holographic medium using the specific coinitiators, and a holographic medium obtainable using the inventive photopolymer formulation. The invention further relates to a laminate structure comprising an inventive holographic medium and likewise specific borates suitable as coinitiators.

Photopolymer formulation for production of holographic media comprising borates with low TG

The invention relates to a photopolymer formulation comprising specific aromatic glycol ethers as writing monomers, matrix polymers and a photoinitiator. The invention further provides an unexposed holographic medium obtainable using an inventive photopolymer formulation, and an exposed holographic medium obtainable by exposing a hologram into an inventive unexposed holographic medium. The invention likewise provides a visual display comprising an inventive exposed holographic medium, for the use of an inventive exposed holographic medium for production of chip cards, identification documents, 3D images, product protection labels, labels, banknotes or holographic optical elements, and specific aromatic glycol ethers.

Aromatic glycol ethers as writing monomers in holographic photopolymer formulations

The present disclosure relates to a thin film type controlled viewing window back light unit and a thin flat type Controlled Viewing window Display using the same. The present disclosure suggests a thin film type back light unit which can include: a base film having a width and a length, and including a high refractive film and a low refractive film stacked on the high refractive film; an incident pattern disposed at one side of a bottom surface of the base film; a reflective pattern disposed at an opposite side apart from the one side with the length of the bottom surface of the base film, and covering the width of the opposite side; a light radiating pattern disposed on an upper surface of the base film; a holographic film for controlling a viewing-window disposed on the light radiating pattern; and a light source being apart from the incident pattern, and providing an incident light to the incident pattern.

Thin film type controlled viewing window back light unit and thin flat type controlled viewing window display using the same

Growing community of inventors

Leverkusen, Germany

Thomas Fäcke