Abstract: Methods and systems for propagating light into a waveguide are provided. The system may include a light source configured to generate light. The system may include at least one mirror configured to direct the light into one or more rays of light. The system may include a Surface Relief Grating disposed on a Volume Bragg Grating. The Surface Relief Grating may receive the one or more rays of light and may diffract the one or more rays of light. The Volume Bragg Grating may be disposed on the waveguide in which the waveguide may be configured to receive the one or more rays of light from the Volume Bragg Grating and propagate the one or more rays of light throughout the waveguide such that an off-Bragg condition is exhibited by the one or more rays of light propagating through the waveguide.

Abstract: A method for detecting a finger is provided. The method includes obtaining a plurality of digital images including a first digital image captured by a camera from a field of view containing a background and a hand including at least one finger, and obtaining an identification of pixels of the plurality of digital images that correspond to at least one finger that is visible in the plurality of digital images rather than to the background, the pixels being identified by: obtaining, from the digital images, a Gaussian brightness falloff pattern indicative of at least one finger, identifying an axis of the at least one finger based on the obtained Gaussian brightness falloff pattern indicative of the at least one finger without identifying edges of the at least one finger, and identifying the pixels that correspond to the at least one finger based on the identified axis.

Abstract: The present invention, in one aspect, relates to monomers and photopolymers that exhibit a high refractive index. The photopolymers of the invention have properties suitable for fabricating holographic optical elements (HOEs).

Abstract: A method of manufacturing a holographic pattern-expressing organogel, by using a dithering mask, according to an aspect of the present disclosure includes: preparing a dithering mask including white pixels and black pixels arranged in periodic patterns; photocuring a polymer by passing an ultraviolet ray through the dithering mask; passing a first solvent through the cured polymer; and passing a second solvent through the cured polymer through which the first solvent is passed.

Abstract: A method for manufacturing a lens element intended to be worn in front of an eye of a wearer, the method comprising obtaining a lens member comprising a holographic recording medium disposed on a first surface of the lens member, the holographic recording medium being configured to be able to convert an interference pattern into a holographic optical element, obtaining wearer prescription data relating at least to the prescription of the wearer, manufacturing a second surface of the lens member based on the wearer prescription data, and recording a holographic optical element within the holographic recording medium so as to provide an additional optical power of opposite sign to the prescribed optical power so as to slow down the progression of the abnormal refraction of the eye.

Abstract: The present disclosure relates to a hologram recording medium having one surface with a higher surface energy than a polymer resin layer containing at least one polymer selected from the group consisting of triacetyl cellulose, alicyclic olefin polymer and polyethylene terephthalate, a hologram recording medium wherein the surface energy of any one surface is 50 mN/m or more, and an optical element comprising the hologram medium.

Abstract: A method including obtaining an at least partially transparent object (1), providing a mask (6) defining at least one opening (8) wherein the contour corresponds to a profile of the anti-counterfeit marking to be structured, the mask (6) covering a surface of the at least partially transparent object (1) at the areas not to be structured, structuring the anti-counterfeit marking by bombarding the at least partially transparent object (1) by an ion beam (14) through the at least one opening (8) of the mask (6), the mechanical properties of the mask (6) being sufficient to prevent the ions of the ion beam (14) from etching the surface of the at least partially transparent object (1) at the areas where this surface is covered by the mask (6), removing the mask (6), and placing the at least partially transparent object (1) in a bath (16) at alkaline pH.

Abstract: A method to control the density of a three-dimensional photonic crystal template involves changing the irradiation time from at least four laser beams to yield a periodic percolating matrix of mass and voids free of condensed matter from a photoresist composition. The photoresist composition includes a photoinitiator at a concentration where the dose or irradiation is controlled by the irradiation time and is less than the irradiation time that would convert all photoinitiator to initiating species such that the density of the three-dimensional photonic crystal template differs for different irradiation times. A deposition of reflecting or absorbing particles can be patterned on the surface of the photoresist composition to form a template with varying densities above different areas of the substrate.

Abstract: Methods and systems wherein laser induced refractive index changes by focused femtosecond laser pulses in optical polymeric materials or optical tissues is performed to address various types of vision correction.

Abstract: The present disclosure relates to a photopolymer composition including a polymer matrix or a precursor thereof having a predetermined chemical structure; a photoreactive monomer; and a photoinitiator, a hologram recording medium, an optical element and a holographic recording method using the same.

Abstract: Apparatuses and methods for improved reconstructions of electron-based holograms are disclosed herein. An example method at least includes forming a hologram of a sample and a known object, forming a reconstruction of the known object using a reconstruction algorithm, comparing the reconstruction of the known object to a reference reconstruction of the known object, and adjusting the reconstruction algorithm based on the comparison of the reconstruction of the known object to the reference reconstruction of the known object. The example method may further include forming a reconstruction of the sample using the adjusted reconstruction algorithm.

Abstract: There are provided volume holograms and combinations of lenticular lenses and holograms in particular for security applications. In embodiments, a volume hologram comprises a holographic medium (102) including a first optical interference structure which, upon illumination, replays a first image (110); wherein the first image includes a lenticular lens layer (111) including an array of lenticules and a lenticular image layer (113) including first (114) and second (115) interlaced images corresponding with the array of lenticules.

Abstract: The present disclosure relates to an ionic compound, and a coating composition and an organic light emitting device including the same.

Abstract: Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. According to additional embodiments, improved approaches are provided to implement deposition of imprint materials onto a substrate, which allow for very precise distribution and deposition of different imprint patterns onto any number of substrate surfaces.

Abstract: A method to form a three-dimensional photonic crystal template with a gradient structure involves irradiating a photoresist composition of a thickness of at least 15 ?m from at least four laser beams to yield a periodic patterned with a percolating matrix of mass in constructive volumes of a cured photoresist composition and destructive volumes of voids free of condensed matter where the proportion of constructive volume displays a gradient from the irradiated surface to the substrate after development. For a given light intensity, photoinitiator concentration in the photoresist composition, and a given thickness, by irradiating for a relatively short period, a three-dimensional photonic crystal template displaying a gradient having greater constructive volume proximal the air interface forms and a relatively long irradiation period results in a gradient having greater constructive volume proximal the substrate.

Abstract: The disclosure provides recording materials include fluorene derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several fluorene structures are disclosed: simply substituted fluorenes, cardo-fluorenes, and spiro-fluorenes. Fluorene derivatized polymers in Bragg gratings applications lead to materials with higher refractive index, low birefringence, and high transparency. Fluorene derivatized monomers/polymers can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

Abstract: Systems and methods for passive multi-directional illumination in light-sheet fluorescence imaging and microscopy are disclosed herein. An elliptical light shaping diffuser is placed in the illumination path between the source of a light-sheet and the illuminated sample. The light-sheet is diffused anisotropically along two directions perpendicular to its propagation direction, eliminating stripe artifacts in obtained images. The method includes converting a light-sheet into an elliptically diffuse light-sheet by passing it through an elliptical light shaping diffuser, illuminating a sample with the elliptically diffuse light-sheet. The system includes a light-sheet source, an elliptical light shaping diffuser adapted to convert the light-sheet into an elliptically diffuse light-sheet to illuminate the sample, typical microscopy optics and lenses, and image capturing elements.

Abstract: A microfluidic chip for culturing and real-time monitoring of multicellular tissues and use method thereof. The chip comprises a glass substrate layer, and a PDMS microchannel layer located on the glass substrate layer, wherein the glass substrate layer comprises a glass substrate, and a plurality of microelectrodes thereon; the PDMS microchannel comprises a plurality of independent microfluidic channels; the microelectrodes on the glass substrate are in one-to-one correspondence with the microfluidic channels in the PDMS microchannel layer; and the microelectrodes are electrically connected to an external circuit. The use method comprises: cell capture, cell or tissue culture, electrical impedance spectroscopy detection, and tissue release.

Abstract: Provided are a liquid crystal diffraction element that can make the brightness of light emitted from a light guide plate uniform and a light guide element. The liquid crystal diffraction element includes: an optically-anisotropic layer that is formed of a composition including a liquid crystal compound, in which the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound continuously rotates in at least one in-plane direction, and a diffraction efficiency of the optically-anisotropic layer increases from one side to another side in the one in-plane direction.

Abstract: A photoresist composition and manufacturing method thereof, a manufacturing method of a metal pattern, and a manufacturing method of an array substrate are provided. The photoresist composition includes a base material and an ion adsorbent, and the ion adsorbent is chelating resin.

Abstract: A system for making a holographic medium for use in generating light patterns for eye tracking includes a light source configured to provide light and a beam splitter configured to separate the light into a first portion of the light and a second portion of the light that is spatially separated from the first portion of the light. The system also includes a first set of optical elements configured to transmit the first portion of the light for providing a first wide-field beam onto an optically recordable medium and one or more diffractive optical elements configured to receive the second portion of the light and project a plurality of separate light patterns onto the optically recordable medium for forming the holographic medium.

Abstract: An apparatus for X-ray imaging is provided. An X-ray source provides an X-ray along an X-ray beam path. A holographic medium is along the X-ray beam path. An X-ray phase grating is between the X-ray source and the holographic medium along the X-ray beam path. A readout beam source provides a readout beam along a readout beam path. A readout detector is along the readout beam path, wherein the holographic medium is along the readout beam path.

Abstract: Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. According to additional embodiments, improved approaches are provided to implement deposition of imprint materials onto a substrate, which allow for very precise distribution and deposition of different imprint patterns onto any number of substrate surfaces.

Abstract: Provided herein are a method of using thermochromic ink for blood simulation in medical training and a method of using thermochromic ink for blood simulation. A prominent application is for simulation of Extracorporeal Membrane Oxygenation (ECMO) simulation.

Abstract: Systems, devices, and methods for eyebox expansion in wearable heads-up display are described. The eyebox of a wearable heads-up display may be expanded by increasing the bandwidth of the hologram comprising the holographic combiner of the wearable heads-up display. The bandwidth of the hologram may be increased by physically coupling a donor film to a hologram film, causing donor material to diffuse into the hologram film and then fixing the donor material in place. Diffusion of donor material into the hologram film causes a change in the slant angle and/or the spacing of at least a portion of the hologram fringes of the hologram film, broadening the bandwidth of the hologram.

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 manufacturing system for creating waveguides that include optical gratings having high coupling efficiencies is described herein. The waveguides are used to guide image light from a source assembly to an eye of a user. The optical gratings are used to couple light into an optical waveguide element and/or decouple light from the optical waveguide element. The manufacturing system creates optical gratings by patterning and adjusts refractive indexes of the optical gratings by infusion and post-processing. A refractive index of an optical grating can be uniform or non-uniform. In-coupling efficiencies of light into a waveguide via the optical gratings and/or out-coupling efficiencies of light out of a waveguide via the optical gratings can be increased. The manufacturing system includes a patterning system, an infusion system, and a post-processing system.

Abstract: The present disclosure relates to a hologram recording medium having a main relaxation temperature (Tr) of 0° C. or less, wherein the Tr is a point where a rate of change of phase angle with respect to temperature is the largest in a range of ?80° C. to 30° C. in dynamic mechanical analysis. The present disclosure also relates to an optical element including the same and a holographic recording method using the hologram recording medium.

Abstract: A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described.

Abstract: The present disclosure relates to a photopolymer composition including: a polymer matrix or a precursor thereof; a photoreactive monomer including a polyfunctional (meth)acrylate monomer having a refractive index of 1.5 or less and a viscosity at 25° C. of 100 cps or less, and a monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more; and a photoinitiator, wherein a content of the monofunctional (meth)acrylate monomer having a refractive index of 1.5 or more in the photoreactive monomer is 60 wt % or more. The present disclosure also relates to a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the photopolymer composition.

Abstract: A hot-stamping foil which is transferred to a transfer target by applying a transfer thermal pressure, including: a carrier that is a base film or a coated base film; a laminated optical decoration having a laminated optical structure formed on the carrier; a sinking control layer which contains a soft resin and a deformation limiting agent and is formed on the laminated optical structure; and an adhesive layer which is formed on the sinking control layer, wherein the adhesive layer contains a resin component which contains a thermoplastic resin having a glass transition temperature lower than room temperature and defines the thickness of the adhesive layer, and spacer particles which have a particle size larger than the thickness of the adhesive layer and some of which protrude from the resin component, and wherein the spacer particles sink into the sinking control layer after transfer thermal pressing.

Abstract: A manufacturing system performs a lithographic patterning of a resist formed on a substrate to create a first optical grating including a plurality of structures at a first slant angle relative to the substrate. The manufacturing system performs a tunable shrinkage of the plurality of structures to adjust the first slant angle to a target slant angle different from the first slant angle. In some embodiments, the manufacturing system performs a post-processing of the plurality of structures to create a second optical grating from the first optical grating. The post-processing may adjust at least one of: a refractive index, a height, and a volume of the first optical grating.

Abstract: A holographic antenna for recording a comprehensive interference pattern beyond the mere minimum and maximum values and reconstructing waveform of a target antenna includes a feed antenna and a holographic structure. The holographic structure includes a substrate and a plurality of spaced metal strips disposed on the substrate. Heights of the metal strips are negatively correlated with intensities of the interference pattern. A method for fabricating such a holographic antenna is also provided.

Abstract: Disclosed is a system configured to project a beam of radiation onto a target portion of a substrate within a lithographic apparatus. The system comprises a mirror having an actuator for positioning the mirror and/or configuring the shape of the mirror, the actuator also providing active damping to the mirror, and a controller for generating actuator control signals for control of said actuator(s). A first coordinate system is used for control of said actuator(s) when positioning said mirror and/or configuring the shape of said mirror and a second coordinate system is used for control of said actuator(s) when providing active damping to said mirror.

Abstract: The invention provides a encapsulation method for OLED panel, by forming an organic defining film surrounding the OLED device on the substrate, then using ALD process to form an inorganic film on the substrate and OLED device covering the package region and then removing the organic defining film to obtain an ALD film corresponding to the above of the package region, and finally forming a package film on ALD film corresponding to the above of the package region complete encapsulation the OLED panel. The present invention uses an organic defining film to realize selective atomic layer deposition, thereby avoiding using the atomic layer deposition mask and related cleaning and replacement problems. The process is relatively simple, thus saving costs, and the resulted package structure meets the encapsulation requirements of flexible OLED panel, able to effectively block the external water oxygen to protect the OLED device.

Abstract: An apparatus for producing an optically variable film includes a laser configured to emit a beam, a telescoping lens section having a first lens and a second lens spaced apart by a first distance and an interferometer configured to direct the beam toward a workpiece. The laser may be operated at a predetermined power level and the first and second lenses are sized and spaced relative to one another to direct the beam onto the workpiece at about 200-230 dots per inch. The workpiece may include a polyethylene terephthalate (PET) layer configured to be ablated by the beam, forming a microstructure in the surface of the layer. The microstructure may be randomized and used to present non-chroma visual effects.

Abstract: The objection of the present invention is to provide a photocurable resin composition having deep curability. The photocurable resin composition comprises an allyl polymer (a) produced by polymerization of an allyl compound represented by the following formula (1), a photocurable compound (b), and a photopolymerization initiator (c). In the formula, n represents an integer of 2 to 4; Z is selected from a binding site, an n-valent aliphatic chain hydrocarbon group optionally having a hydroxyl group, an n-valent alicyclic hydrocarbon group optionally having an alkyl group, and an n-valent aromatic hydrocarbon group optionally having an alkyl group; n is 2 and two —COOCH2CH?CH2 moieties are directly bonded to each other when Z is a binding site.

Abstract: There is provided a polarizing plate protective film including a substrate and a hard coat layer, wherein the hard coat layer is a layer formed by curing a photocurable composition containing a polyfunctional (meth)acrylate compound and an acid anhydride, and a content of the acid anhydride in the photocurable composition is 8% by mass or more based on a total solid content of the photocurable composition.

Abstract: The present disclosure provides a photosensitive resin composition and a method for forming a quantum dot pattern using the same. The photosensitive resin composition includes quantum dots which are dispersed in the photosensitive resin composition and each has a modification layer. The method for forming a quantum dot pattern includes coating, exposing and developing a photoresist to obtain the quantum dot pattern, wherein the photoresist is the above-mentioned photosensitive resin composition.

Abstract: An apparatus and method for fabricating a touch screen panel is disclosed. The method includes forming material patterns on different areas of a blanket roll and printing the material patterns on a transparent substrate by rotating the blanket roll over the transparent substrate. An apparatus for fabricating a touch screen panel includes a blanket roll being rotatable about a rotational axis and configured to print a plurality of material patterns on a substrate while rotating over the substrate. A circumferential surface of the blanket roll includes circumferential areas that are angularly separate from each other about the rotational axis. Each of circumferential areas comprises a pattern for printing a component of a sensing cell to be formed on the substrate.

Abstract: An in-mold molding method of the present invention is a method including: placing an in-mold transfer film in the cavity of an injection molding mold, the in-mold transfer film having a hard coating layer and a transfer section of a printed layer; and peeling, from the base material film of the in-mold transfer film, the transfer section transferred to a molding resin when a molding molded by injecting the molding resin into the cavity is removed by mold opening. The hard coating layer is ruptured in a mold opening process while the in-mold transfer film has a necessary elongation of A % on the side of the molding and the hard coating layer has a rupture elongation of at least A %+2% and less than A %+40% on the side of the molding. With this configuration, the in-mold transfer film can be stably peeled during in-mold molding.

Abstract: A composition comprising a source of metal ions and at least one additive comprising at least one polyaminoamide, said polyaminoamide comprising the structural unit represented by formula I or derivatives of the polyaminoamide of formula I obtainable by complete or partial protonation, N-functionalization or N-quaternization with a non-aromatic reactant, wherein D6 is, for each repeating unit 1 to s independently, a divalent group selected from a saturated or unsaturated C1-C20 organic radical, D7 is, for each repeating unit 1 to s independently, a divalent group selected from straight chain or branched C2-C20 alkanediyl, which may optionally be interrupted by heteroatoms or divalent groups selected from O, S and NR10, R1 is, for each repeating unit 1 to s independently, selected from H, C1-C20 alkyl, and C1-C20 alkenyl, which may optionally be substituted by hydroxyl, alkoxy or alkoxycarbonyl, or, together with R2, may form a divalent group D8, and R2 is, for each repeating unit 1 to s independently, s

Abstract: Techniques disclosed herein include methods for creating a directed self-assembly tunable neutral layer that works with multiple different block copolymer materials. Techniques herein can include depositing a neutral layer and then post-processing this neutral layer to tune its characteristics so that the neutral layer is compatible with a particular block copolymer scheme or schemes. Post-processing herein of such a neutral layer can modify a ratio of pi and sigma bonds in a given carbon film or other film to approximate a given self-assembly film that will be deposited on this neutral layer. Accordingly, a generic or single material can be used for a neutral layer and modified to match a given block copolymer to be deposited.

Abstract: Hybrid white-light viewable holograms and methods for making them. The holograms are hybrid reflection holograms made using the diffractive structures or gratings of a holographic object such as a transmission hologram or holographic optical element (HOE). The wavefronts of the diffractive structures are converted into a reflection hologram by scanning them with a coherent light source having a profiled narrow beam. The hybrid reflection hologram can exhibit display parameters including the multiple colors, solidity, and color stability of white light reflection holograms, the diffractive color shifting of a white light transmission hologram, three dimensional imaging and a wide variety of dynamic changes. Different areas or images with each of these effects can be combined in a single hologram. These hybrid reflection holograms are ideal for security and forgery prevention applications.

Abstract: 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.

Abstract: Provided is a low-emissivity transparent laminate comprising a transparent substrate and a coating layer placed on the transparent substrate, wherein the coating layer has a multilayered structure sequentially comprising a low-emissivity layer, a buffer layer comprising a ZnSe-based composite metal nitride, and a dielectric layer from the transparent substrate.

Abstract: The subject matter of the invention is a method for producing illuminated, holographic media comprising a photopolymer formulation having the adjustable mechanical modulus GUV. A further subject matter of the invention is an illuminated, holographic medium that can be obtained by means of the method according to the invention.

Abstract: Technologies are generally described for generating a holographic image on a transparent screen such that a user can view another scenery image though the screen along with the generated holographic image. Example devices may include an ultraviolet light irradiation unit configured to irradiate an ultraviolet light towards a hologram generating unit. The holographic generating unit may be configured to generate a hologram image in response to the received ultraviolet light. Further, the light irradiation unit and the hologram generating unit may be operable to project the hologram image onto a transparent screen coated with a photochromic material. The light transmittance of the photochromic material coated on the transparent screen may change when a light beam with a specific frequency range is irradiated on the photochromic material. The example device may further include a hologram reconstruction light source configured to irradiate a hologram reconstruction light on the transparent screen.

Abstract: This invention teaches a methodology and an optical apparatus that provides long-term, archival storage using a chemically stable, high-resolution, photosensitive emulsion, such as silver halide, for the long-term, archival storage and retrieval of data, images and text. Multiple state data substantially increasing data density is stored as vertical diffraction gratings in the archival photosensitive emulsion. The data can be read out in parallel, substantially increasing retrieval speeds beyond that of current optical and magnetic techniques.

Abstract: A method of producing a light-emitting diode includes providing at least one light-emitting diode chip, providing a suspension comprising a solvent and particles of at least one luminescent material, arranging the at least one light-emitting diode chip in the suspension, electrophoretically depositing the particles on an outer face of the at least one light-emitting diode chip, and completing the light-emitting diode.