236results about "Hologram recording material" patented technology

One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lamina configured to extract light from the second substrate along the second direction; wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.

The present invention relates to photopolymerizable compositions and elements made therefrom, as well as their use. The photopolymerizable compositions are particularly suitable as recording material for optical elements with refractive index modulation, in particular holograms.

Systems for the manufacturing of waveguide cells in accordance with various embodiments can be configured and implemented in many different ways. In many embodiments, various deposition mechanisms are used to deposit layer(s) of optical recording material onto a transparent substrate. A second transparent substrate can be provided, and the three layers can be laminated to form a waveguide cell. Suitable optical recording material can vary widely depending on the given application. In some embodiments, the optical recording material deposited has a similar composition throughout the layer. In a number of embodiments, the optical recording material spatially varies in composition, allowing for the formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.

A compound represented by the following formula (1).[In the formula, A represents a polymerizable group. L represents an optionally branched (n+1)-valent linking group. R1 represents an aromatic ring group optionally having a substituent. R2 represents a cyclic group optionally having a substituent. R3 represents a monovalent organic group having no polymerizable group or a hydrogen atom. X1, X2, and X3 each independently represent an oxygen atom, a sulfur atom, or a nitrogen atom optionally having a substituent. m represents an integer of 0 or 1. n represents an integer of 1 to 3. When n is 2 or 3, a plurality of As may be the same or different from each other. p, q, and r each independently represent an integer of 0 or 1. In the formula, R1 may be bonded to R2 or R3 at any position to form an asymmetric ring structure. In the formula, —(X1)p—R1, —(X2)q—R2 and —(X3)r—R3 are not the same.]

To allow systems for manufacturing waveguide cells in accordance with various embodiments to be configured and implemented in many different ways.SOLUTION: In many embodiments, various deposition mechanisms are used to deposit a layer(s) of an optical recording material(s) onto a transparent substrate. A second transparent substrate can be provided, and the three layers can be laminated to form a waveguide cell. A suitable optical recording material can vary widely depending on a given application. In some embodiments, the optical recording material deposited has a similar composition throughout a layer. In a number of embodiments, the optical recording material spatially varies in composition, enabling formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.SELECTED DRAWING: Figure 11

Mastering systems and methods of fabricating waveguides and waveguide devices using such mastering systems are described. Mastering systems for fabricating holographic waveguides can include using a master to control the application of energy (e.g. a laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides in accordance with embodiments of the invention can include a variety of features. These features include, but are not limited to: chirp for single input beam copy (near i.e. hybrid contact copy), dual chirped gratings (for input and output), zero order grating for transmittance control, alignment reference gratings, 3:1 construction, position adjustment tooling to enable rapid alignment, optimization of lens and window thickness for multiple RKVs simultaneously, and avoidance of other orders and crossover of the diffraction beam.

Systems for the manufacturing of waveguide cells in accordance with various embodiments can be configured and implemented in many different ways. In many embodiments, various deposition mechanisms are used to deposit layer(s) of optical recording material onto a transparent substrate. A second transparent substrate can be provided, and the three layers can be laminated to form a waveguide cell. Suitable optical recording material can vary widely depending on the given application. In some embodiments, the optical recording material deposited has a similar composition throughout the layer. In a number of embodiments, the optical recording material spatially varies in composition, allowing for the formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.

One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lamina configured to extract light from the second substrate along the second direction; wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.

Mastering systems and methods of fabricating waveguides and waveguide devices using such mastering systems are described. Mastering systems for fabricating holographic waveguides can include using a master to control the application of energy (e.g. a laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides in accordance with embodiments of the invention can include a variety of features. These features include, but are not limited to: chirp for single input beam copy (near i.e. hybrid contact copy), dual chirped gratings (for input and output), zero order grating for transmittance control, alignment reference gratings, 3: 1 construction, position adjustment tooling to enable rapid alignment, optimization of lens and window thickness for multiple RKVs simultaneously, and avoidance of other orders and crossover of the diffraction beam.

To provide mastering systems and methods for fabricating waveguides, and waveguide devices using such mastering systems.SOLUTION: A mastering system for fabricating holographic waveguides may employ a step of using a master to control application of energy (e.g., laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides according to embodiments of the present invention may include a variety of features.SELECTED DRAWING: Figure 5

The invention relates to a composition for a holographic recording medium and the holographic recording medium. The composition for the holographic recording medium comprises the following components: a substrate film-forming substance, an active monomer, a photoinitiator and the like. Wherein a substrate film-forming substance mainly adopts a mechanical support as an active monomer to construct a free shuttling spatial network structure, and needs certain rigidity and heat-resistant stability, and tests show that the rigidity and heat-resistant stability of the material can be obviously improved by introducing unsaturated ring structures such as a benzene ring, a naphthalene ring and a do-not ring into the structure; therefore, a powerful spatial network structure is provided for free shuttling of the active monomers, and the display effect of the holographic recording medium is guaranteed.

A light guide plate may be configured for image display. Such a light guide plate may include: a first resin base; and a hologram layer, wherein the first resin base may have an MC value of 0.120 or less, the MC value being obtained by evaluation using shadow contrast by Expression (1):MC=L⁢max-L⁢minL⁢max+L⁢min.(1)wherein Lmax is a maximum value of brightness from a brightness distribution, Lmin is a minimum value of the brightness 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. The first resin base may be manufactured by performing cutting and polishing processing.

Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated periodic structures (EPSs). EPSs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) periodic structure. Removing the liquid crystal from the cured periodic structure provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays.

To provide a photosensitive composition capable of further improving diffraction characteristics.The present technology provides a photosensitive composition including: at least a compound represented by the following general formula (1); a binder resin; and a photoinitiator.In the general formula (1), X1 represents an oxygen atom, a nitrogen atom, a phosphorus atom, a caron atom, or a silicon atom.Y1 and Y2 each represent a benzene ring or a naphthalene ring, and both Y1 and Y2 do not represent benzene rings.R1 to R3 each represent a hydrogen or a substituent group represented by *—Z1(R4)d (* represents a bonding site).Z1 represents a single bond, a saturated hydrocarbon group having a valence of 2 or higher, or an unsaturated hydrocarbon group having a valence of 2 or higher, and the saturated hydrocarbon group or the unsaturated hydrocarbon group may have an ether bond and / or a thioether bond.R4 represents a hydrogen or a polymerizable substituent group.

The present application relates to a method for manufacturing optical waveguides. A mastering system and methods for manufacturing waveguides and waveguide devices using such a mastering system are described. The mastering system for manufacturing holographic waveguides may include using a master to control the application of energy (e.g., laser, optical, or magnetic beams) to a liquid crystal substrate to manufacture the holographic waveguide within the liquid crystal substrate. The mastering system for manufacturing holographic waveguides according to embodiments of the present invention may include various features. These features include, but are not limited to: chirping for a single input beam replica (i.e., near hybrid contact replicas), double-chirped gratings (for input and output), a zero-order grating for transmission control, an alignment reference grating, a 3:1 configuration, a position adjustment tool to enable rapid alignment, simultaneous optimization of lens and window thicknesses for multiple RKVs, and avoidance of crossover of diffracted beams and other orders.

Techniques disclosed herein relate to photo-patternable latent-chemistry inorganic materials. An example of the photo-patternable latent-chemistry inorganic materials includes a sol-gel material comprising a solution containing a tin dichloride salt, at least one alcohol containing solvent, and optionally a photo-acid generator or photo-acid. The sol-gel material, upon selective photo-excitation (which forms a latent pattern with latent chemistry in the sol-gel material) and blanket thermal annealing, can form a coating having a formula SnO(n)X(m), where the n:m ratio and / or n-m values of the coating vary across regions of the coating, such that a refractive index of the coating varies across regions of the coating, without affecting the coating's transparency for visible light.

Mastering systems and methods of fabricating waveguides and waveguide devices using such mastering systems are described. Mastering systems for fabricating holographic waveguides can include using a master to control the application of energy (e.g. a laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides in accordance with embodiments of the invention can include a variety of features. These features include, but are not limited to: chirp for single input beam copy (near i.e. hybrid contact copy), dual chirped gratings (for input and output), zero order grating for transmittance control, alignment reference gratings, 3:1 construction, position adjustment tooling to enable rapid alignment, optimization of lens and window thickness for multiple RKVs simultaneously, and avoidance of other orders and crossover of the diffraction beam.

The present invention relates to a fluorinated compound, a photopolymerizable composition, a hologram recording medium, a preparation method thereof, and an optical element comprising the same. The fluorinated compound is included in a photopolymerizable composition, thereby being able to provide a hologram recording medium that not only has excellent optical recording properties but also exhibits transparent optical properties and excellent reliability even in high temperature and high humidity environments, and an optical element including the same.

Interlayers that exhibit superior properties and that provide desirable optical properties when incorporated into laminates, such as windshields, windows or other glazings containing a holographic optical element (HOE) are disclosed. The interlayers, when used in a laminate in conjunction with the HOE film, maintain and do not detract from the HOE film properties.

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.

The present disclosure relates to a holographic grating which includes a holographic photopolymer, and to an augmented reality / virtual reality apparatus including the same. The holographic grating may include at least one nanoparticle, a light portion, a dark portion, and a holographic photopolymer. The holographic photopolymer may also include a polymer matrix, a writing monomer, and a dye system. The holographic photopolymer may be dispersed throughout the light portion and the dark portion of the holographic grating. In some forms, the light portion may include a first concentration of the nanoparticles and / or the dark portion may include a second concentration of the nanoparticles. The first concentration of the nanoparticles may be greater than the second concentration of the nanoparticles.

A compound represented by the following formula (1): [In the formula, A represents a polymerizable group. n represents an integer of 1 to 3. L represents an optionally branched (n+1)-valent linking group. Z represents an oxygen atom, or a nitrogen atom optionally having a substituent. m represents an integer of 0 or 1. X represents a single bond, an oxygen atom, a sulfur atom, a carbon atom optionally having a substituent, or a nitrogen atom optionally having a substituent. p represents an integer of 0 to 2. When p is 2, the two Xs may be the same or different. Y1 and Y2 are each independently a benzene ring, a naphthalene ring, or a phenanthrene ring. When Y1 or Y2 is a benzene ring, a or b corresponding to Y1 or Y2 is an integer of 0 to 4. When Y1 or Y2 is a naphthalene ring, a or b corresponding to Y1 or Y2 is an integer of 0 to 6. When Y1 or Y2 is a phenanthrene ring, a or b corresponding to Y1 or Y2 is an integer from 0 to 8. R1 and R2 each independently represent an aromatic ring group optionally having a substituent. When a and b are 2 or more, a plurality of R1S and R2s may be the same or different from each other. In the formula, Y1 and Y2 are not both benzene rings and a and b are not both 0.]

The invention relates to a fluorinated compound, a photopolymerizable composition, a hologram recording medium, a method for preparing the same, and an optical element including the same. The fluorinated compound is included in the photopolymerizable composition, thereby being able to provide a hologram recording medium having not only excellent optical recording characteristics but also transparent optical characteristics, and exhibiting excellent reliability even in high-temperature and high-humidity environments, and an optical element including the same.

A holographic photopolymer material, a holographic photosensitive film, a holographic optical element, and a display device, wherein the holographic photopolymer material includes a polymer matrix, photopolymerizable monomers, and a photosensitizer. An index of refraction of the photopolymerizable monomer is greater than an index of refraction of the polymer matrix. A molecular structure of the polymer matrix includes a linear structure, and branch chains of the polymer matrix include activation groups; and / or the molecular structure of the polymer matrix includes a crosslinked structure.

The invention relates to a device for continuously replicating holograms, comprising: a coating module arranged to coat a liquid photopolymer onto a first carrier film; a lamination module arranged to apply a second carrier film onto the first carrier film coated with the photopolymer in order to obtain a photopolymer composite comprising a liquid photopolymer layer between the two carrier films; an exposure module, the exposure module having a light source and a master element comprising a master hologram to be replicated, the master element being mounted so as to be axially rotatable, and the exposure module being arranged such that a photopolymer composite is in optical contact with the master element, simultaneously exposing the master hologram onto the region of the photopolymer composite by the light source to obtain a duplicated hologram; and a securing module arranged to cure the replicated hologram in the photopolymer composite.

The invention relates to a method for replicating a polychromatic hologram combination, comprising the following steps: providing a first master hologram which is designed for a first wavelength range, and providing a second master hologram which is designed for a second wavelength range; providing a replication combination comprising a first light-sensitive layer on a replication substrate; exposing the first master hologram to obtain a first replicated hologram in the first light-sensitive layer by means of light of the first wavelength range; fixing the first replicated hologram in the first light-sensitive layer; applying a second light-sensitive layer onto the first light-sensitive layer; exposing the second master hologram to obtain a second replicated hologram in the second light-sensitive layer by means of light of a second wavelength range; fixing the second replicated hologram in the second light-sensitive layer. The invention also relates to a replication combination comprising at least a first and a second replicated hologram, which replication combination can be produced by means of the method according to the invention.

There is provided an optical film (10) including a recording surface (14) on which a plurality of unit blocks (12) are disposed at regular intervals. For these unit blocks (12), phase components of light from a reconstruction point (22) are calculated. The recording surface (14) includes a calculated element region (16) provided with an array of the unit blocks (12) for which phase components of light from the reconstruction point (22) are calculated for reproduction of an image. A first image is a monotone reconstruction image having even brightness, and a second image is a grayscale image having brightness gradation.

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.

Holographic photopolymer materials, holographic photosensitive films, holographic optical elements, and display devices are provided. The holographic photopolymer material comprises a polymer matrix, a photopolymerizable monomer, and a photosensitizer. The refractive index of the photopolymerizable monomer is greater than that of the polymer matrix. The molecular structure of the polymer matrix includes a linear structure, the branched chains of the polymer matrix include activating groups, and / or the molecular structure of the polymer matrix includes a crosslinked structure. Because polymer matrices with a crosslinked molecular structure have a high glass transition temperature, holographic photopolymer materials have good heat resistance. Because holographic photopolymer materials with a linear molecular structure include activating groups that can form crosslinked structures, optical elements made from holographic photopolymer materials can have crosslinked structures, i.e., optical elements can have good heat resistance. Holographic photopolymer materials have good heat resistance, or optical elements made from holographic photopolymer materials can have good heat resistance.

To provide mastering systems and methods for fabricating waveguides, and waveguide devices using such mastering systems.SOLUTION: A mastering system for fabricating holographic waveguides may employ a step of using a master to control application of energy (e.g., laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides according to embodiments of the present invention may include a variety of features.SELECTED DRAWING: Figure 5