63results about "Substrate with hologram" patented technology

A light guide plate for image display can display clear images even when a resin base is used. The Sight guide plate configured for image display may include a first resin base and a hologram layer. The first resin base may have an MC value of 0.120 or less, obtained by evaluation using shadow contrast, according to expression (1):MC=Lmax-LminLmax+Lmin,(1)wherein Lmax is a maximum value of brightness from a brightness distribution, Lmin is a minimum value of the lightness from the brightness distribution, and MC is an MC value that objectively represents a magnitude of a dip in low brightness portions in the brightness distribution.

A method for storing data in a holographic medium is provided. The method comprises recording a plurality of holograms in one or more at least partially overlapping regions in a holographic medium. The data is stored in a combination of the plurality of holograms. A system for implementing the method is also provided.

The invention relates to a method for actively optimizing a playback configuration of a virtual retinal display (16a-d) comprising a light projector (10a-d) and a holographic combiner (12a-d) with at least one holographic-optical element (14a-d). It is proposed that in at least one process step (52a-d) of the process, one or more beam parameters of a light signal (18a-d) emitted by the light projector (10a-d) and / or one or more holographic reconstruction parameters of the holographic combiner (12a-d), in particular during operation of the virtual retinal display (16a-d), are actively modified with the aim of optimizing a hologram efficiency of the holographic-optical element (14a-d), in particular optimizing a hologram-side angular and / or wavelength bandwidth with which a hologram target efficiency can be achieved.

A display device comprises a spatial light modulator (hologram) 404, a substrate 402, and an attachment material (Aluminium Nitride adhesive) 430 for mounting the spatial light modulator on the substr

Optical article (200) comprising at least: - a substrate (201), and - a holographic waveguide (202) covering at least part of the substrate (201) and comprising : - two main surfaces (203, 204), at least one of them conforming to a surface (201a) of the substrate (201), and - at least first and second zones (Z1, Z2) that are configured so that light incoming on one of the first and second zones (Z1; Z2) is at least partially guided towards the other of said first and second zones (Z2; Z1).

The present invention relates to a method for producing a substrate coated with a photopolymer film, wherein the photopolymer film is suitable in a partial region of its total surface to form a holographic optical element (HOE). The product of the process can be used in laminated glass for building glazing or in vehicle windows.

Methods for producing a security or value document (11), - in which at least one upper layer (3) and at least one lower layer (5) are combined to form a document body (6), - in which at least one upper layer (3) forms a top side and at least one lower layer (5) forms a bottom side of the document body (6), - in which a window (12) is provided in the document body (6) in which the document body (6) is transparent to light of a wavelength between the top and bottom, or in which a window section (18) is provided in at least one upper or at least one lower layer (3, 5), - in which a security hologram (16) is positioned between the top and bottom of the document body (6) and is associated with the window (12) or window section (18), - in which at least one cutout (14) is made in at least one inner layer (4) which is arranged between at least one upper and at least one lower layer (3, 5) in the document body (6), - in which a security hologram (16) is punched out with a punching tool (26, 32) with a format which corresponds to the size of the punching out (14) of the at least one inner layer (4), - in which the die-cut format of the security hologram (16) is inserted into the die-cut (14) of at least one inner layer (4), and - in which the at least one inner layer (4) with the security hologram (16) received in the die-cut (14) is supplied to the at least one upper and / or the at least one lower layer (3, 5), and - in which the at least one inner layer (3) with the security hologram (16) inserted in the die-cut (14) and the at least one upper layer (3) and the at least one lower layer (5) are joined together and laminated together, characterized in that - that a track material with several consecutive security holograms (16) is provided, and - that a transmission hologram is incorporated as a security hologram (16) into the document body (6) with a window section (18) that allows light to pass through from the top to the bottom to form the window (12).

Laminated pane (100), at least comprising a first pane (1), a second pane (2) and a stack of layers arranged in between, at least comprising the following layers in the order from the first pane (1) to the second pane (2): a first thermoplastic intermediate layer (3), a separating layer (5), a photopolymer layer (4) with at least one holographic element, a carrier layer (7) and a second thermoplastic intermediate layer (6), wherein - the photopolymer layer (4) has a thickness of 5 µm to 50 µm, - the carrier layer (7) contains polyethylene terephthalate (PET), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC) and / or cellulose triacetate (TAC) and has a thickness of 20 µm to 100 µm, wherein the carrier layer (7) is arranged directly adjacent to the photopolymer layer (4), and - the separating layer (5) contains polyethylene (PE), polyvinyl chloride (PVC) and / or polymethyl methacrylate (PMMA) and has a thickness of 10 µm to 300 µm.

The present disclosure relates to an optical element intended to be worn in front of the eye of a wearer. This optical element has two main surfaces and comprises at least one holographic diffusing element having a diffusing property resulting from a spatial variation of the refractive index of said holographic diffusing element. This spatial variation of the refractive index is greater than 0.001 at at least one given wavelength over a distance of less than 30 pm. The present disclosure also includes an optical equipment comprising such an optical element and a method for recording a holographic medium onto an optical lens.

An optical master is created by using a nanoimprint alignment layer to pattern a liquid crystal (LC) layer. The nanoimprint alignment layer and the LC layer constitute the optical master. The optical master is positioned above a photoalignment layer. The optical master is illuminated and light propagating through the nanoimprinted alignment layer and the LC layer is diffracted and subsequently strikes the photo-alignment layer. The incident diffracted light causes the pattern in the LC layer to be transferred to the photo-alignment layer. A second LC layer is deposited onto the patterned photo-alignment layer, which subsequently is used to align the molecules of the second LC layer. The second LC layer in the patterned photo-alignment layer may be utilized as a replica optical master or as a diffractive optical element for directing light in optical devices such as augmented reality display devices.

Method for manufacturing a component (6) with a hologram (5), wherein during the manufacturing process of the component (6) a form matrix (1) and a tool matrix (2) having a hologram negative (4) act on the component (6) in a manufacturing tool and the hologram (5) is imprinted in a manufacturing process-integrated manner during a manufacturing step of the component by the action of the manufacturing tool on the component (6), wherein the tool die (2) is designed as an insert in the form die (1) of the manufacturing tool and where the manufacturing tool is an injection mold, thermoforming tool or RTM tool, and wherein the tool die (2) is in direct contact with a surface of the component (6) during a residence time in which a molding compound hardens to form the component, and the hologram (5) of the tool die (2) is transferred to the component (6).

A laminated pane includes first and second panes, a layer stack arranged therebetween including a first thermoplastic intermediate layer, a separating layer, a photopolymer layer with at least one holographic element, a carrier layer, and a second thermoplastic intermediate layer, wherein the photopolymer layer has a thickness of 5 μm to 50 μm, the carrier layer contains polyethylene terephthalate (PET), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyamide (PA), polyvinyl chloride (PVC), and / or cellulose triacetate (TAC) and has a thickness of 20 μm to 100 μm, wherein the carrier layer is arranged directly adjacent the photopolymer layer, and the separating layer contains polyethylene (PE), polyvinyl chloride (PVC), and / or polymethyl methacrylate (PMMA) and has a thickness of 10 μm to 300 μm.

A method for producing a curved substrate panel with a hologram includes producing a curved substrate panel from plastic by forming, injection moulding or injection-compression molding between a first mold half, which defines a predetermined desired geometry of a substrate surface, and a second mold half removing the first mold half from the second mold half and applying a holographic master to a surface of the first mold half, or of a further mold half fixing the first mold half or further mold half on the second mold half such that an empty gap of a predetermined constant thickness remains between the holographic master and the substrate surface, and filling this gap with a hologram-receiving material; and exposing the hologram-receiving layer formed between the substrate surface and the holographic master with a coherent light for forming a hologram defined by the holographic master.

A method of producing an optoelectronic component (10, 20, 30, 40, 50, 60) comprises the following method steps. A carrier (101) is provided with a holographic medium (104) attached to atop side (102) of the carrier (101). An optoelectronic semiconductor chip (105) is arranged at a bottom side (103) of the carrier (101) and the optoelectronic semiconductor chip (105) is connected to the carrier (101) rigidly. The optoelectronic semiconductor chip (105) is designed to emit electromagnetic radiation. A hologram is generated by illuminating the holographic medium (104). The hologram is designed as an optical component for electromagnetic radiation emitted by the optoelectronic semiconductor chip (105).

A laminated pane includes an outer pane having an outer surface and an interior surface, an inner pane having an outer surface and an interior surface, a first intermediate layer, and a hologram element having at least one hologram, wherein the first intermediate layer is arranged between the outer pane and the inner pane, the hologram element is arranged between the outer pane and the first intermediate layer or between the inner pane and the first intermediate layer, and wherein a UV protection layer is arranged on the interior surface of the outer pane.

This solution discloses a volume holographic optical diffusion element and its manufacturing method and device. By adding a first lens assembly between a first diffusion element and a holographic photosensitive material, the first lens assembly is used to project the real image of the first diffusion element onto the holographic photosensitive material layer. Due to the limited entrance pupil diameter of the first lens assembly, only light within a certain angle range of the light emitted by the random point light source generated when the signal light illuminates the first diffusion element can pass through the first lens assembly, resulting in a limited divergence angle for the light projected behind the real image of the holographic photosensitive material layer. Accordingly, the reproduced signal light generated during the display process also has a limited divergence angle, which not only meets the diffusion requirement that all real image points can enter the human eye, but also avoids the waste of light energy caused by excessive diffusion, thereby improving light energy utilization, increasing display brightness, and reducing device energy consumption, and has great practical value.

In some implementations, an optical master is created by using a nanoimprint alignment layer to pattern a liquid crystal layer. The nanoimprint alignment layer and the liquid crystal layer constitute the optical master. The optical master is positioned above a photo-alignment layer. The optical master is illuminated and light propagating through the nanoimprinted alignment layer and the liquid crystal layer is diffracted and subsequently strikes the photo-alignment layer. The incident diffracted light causes the pattern in the liquid crystal layer to be transferred to the photo-alignment layer. A second liquid crystal layer is deposited onto the patterned photo-alignment layer, which subsequently is used to align the molecules of the second liquid crystal layer. In some implementations, the second liquid crystal layer in the patterned photo-alignment layer may be utilized as a replica optical master or as a diffractive optical element, such as for directing light in optical devices such as display devices, including augmented reality display devices.

This application relates to a composition for a holographic recording medium and a holographic recording medium using the composition for a holographic recording medium. In this application, a substrate film-forming substance contained in the composition for a holographic recording medium is structurally designed, and a refractive index of a substrate is reduced to enhance an overall refractive index difference, so that a high-performance VHG is prepared.

Disclosed are a volume holographic optical diffusion element and a manufacturing method and apparatus thereof. A first lens assembly is provided between a first diffusion element and a holographic photosensitive material layer. A real image of the first diffusion element is projected onto the holographic photosensitive material layer by the first lens assembly. Among rays of light emitted by random point light sources generated when the first diffusion element is irradiated with signal light, only rays within a certain angle range can pass through the first lens assembly due to the constraint of the entrance pupil aperture of the first lens assembly, so that rays of light on a rear side of the real image projected onto the holographic photosensitive material layer have a limited divergence angle.

A method of displaying a Computer Generated Holographic (CGH) image by a display, including setting pixel values of a Spatial Light Modulator (SLM) included in a Head Mounted Display (HMD), producing a interference based holographic image at a first location by projecting coherent light onto the SLM, and re-imaging the holographic image from the first location to form a holographic image in front of an eye of a viewer wearing the HMD. Related apparatus and methods are also described.

Exterior lighting device (30) for a motor vehicle (40), wherein the exterior lighting device (30) comprises a design cover (31) and at least one detection device (10) with an image detection device (35) and a carrier medium (12), wherein the carrier medium (12) is designed as a light guide on which an input area (16) and an output area (18) are provided, wherein - the carrier medium (12) with the coupling area (16) and the coupling area (18) is designed as a planar detection element (11) adapted to a surface shape (33) of the design aperture (31) for the design aperture (31); - the coupling area (16) is designed as a holographic element (14) with a first deflection structure (20) designed to couple light (100) falling from an environment onto the first deflection structure (20) into the carrier medium (12); - the carrier medium (12) is designed to transfer the coupled light (100) from the coupling area (16) to the coupling area (18) by means of internal reflection; - the coupling area (18) is designed as a holographic element (14) with a second deflection structure (22) designed to couple the transmitted light (100) falling on the second deflection structure (22) out of the carrier medium (12); - the image acquisition device (35) is designed to capture the light (100) coupled out from the acquisition element (11) at the coupling area (18) and to provide it as image data that correlates with the captured light (100); and - the external lighting device (30) comprises two detection devices (10) which are spatially separated from each other and arranged on two opposing edge areas of the design panel (31).

A system for displaying a holographic image of an object behind a real object surface, including a computing unit for computing data for displaying a three-dimensional image of an object, a location measurement unit for measuring a location of a surface of a real object, a display for displaying the three dimensional image of the object, wherein the computing unit is adapted to compute data to display the three-dimensional image of the object at least partly behind the surface of the real object. Related apparatus and methods are also described.

A holographic data storage medium shaped as tape is provided. The holographic data storage medium has a thickness of 60μm or less. A holographic tape cartridge for use with a holographic data storage system is also provided. A system for receiving a holographic tape cartridge comprising a holographic data storage medium is also provided. A holographic tape library is also provided.

A holographic device for a virtual retinal display and a method of forming the holographic device, the holographic device including a transparent substrate and a holographic element disposed on the substrate, the holographic element including a phase pattern, the phase pattern being a predetermined optical coma aberration constructed and arranged to diffract light from a light source to form a plurality of images at an image plane of the holographic element.A virtual retinal display including the holographic device.An augmented reality system including the virtual retinal device and smart glasses.

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 optical master is created by using a nanoimprint alignment layer to pattern a liquid crystal layer. The nanoimprint alignment layer and the liquid crystal layer constitute the optical master. The optical master is positioned above a photo-alignment layer. The optical master is illuminated and light propagating through the nanoimprinted alignment layer and the liquid crystal layer is diffracted and subsequently strikes the photo-alignment layer. The incident diffracted light causes the pattern in the liquid crystal layer to be transferred to the photo-alignment layer. A second liquid crystal layer is deposited onto the patterned photo-alignment layer, which subsequently is used to align the molecules of the second liquid crystal layer. The second liquid crystal layer in the patterned photo-alignment layer may be utilized as a replica optical master or as a diffractive optical element for directing light in optical devices such as augmented reality display devices.

Provided is an augmented reality device. The augmented reality device includes a first projection assembly and a first display assembly. The first display assembly is disposed on a light exit side of the first projection assembly. The first projection assembly includes a first scanner, a first laser, and a first lens group. The first display assembly includes a first holographic diffraction grating and a first lens. An exposure device is also provided.

A head mounted display (HMD) system employs a holographic element in the optical path of the HMD to direct light to a user's eye. The HMD includes a micro-display, a lightguide, and a holographic element coupled to the lightguide. The holographic element is coupled to a polarization film, and together the element and film reflect and transmit light of different polarities in a specified pattern to assist the lightguide in directing light to the user's eye. For example, the hologram and polarization film can be configured to pass R-polarized light and reflect L-polarized light, thereby directing light from the waveguide along a specified path.