|| List of recent Hologram-related patents
| Optical information recording apparatus, optical information recording method, optical information reproducing apparatus and optical information reproducing method|
An optical information recording/reproducing apparatus and an optical information recording/reproducing method that record information using holography, wherein the optical information recording/reproducing apparatus includes a signal generation unit that generates two-dimensional data by a two-dimensional encoding method in which a lower-limit value of a number of continuous on/off pixels in an array in one direction of pixels in a two-dimensional spatial light modulator is k(k≧2, k: natural number); and a pickup that records the two-dimensional data, generated by the signal generation unit, on a hologram disc.. .
| Digital hologram recording system and numerical reconstruction method for hologram|
The present invention provides a digital hologram recording system and a numerical reconstruction method for a hologram, which are used for capturing an image of an object and recording it as a holographic data. Said system comprises: signal light, formed after irradiating the object with a light source; an image detector, for recording interference fringes of the signal light; and a light pipe, arranged in a path of the signal light and located between the object and the image detector, wherein the light pipe has a reflection surface, and a part of the signal light enters the image detector after reflected by the reflection surface of the light pipe.
| Method of producing volume hologram laminate|
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..
|Hologram recording film and method of manufacturing same, and image display apparatus|
A hologram recording film manufacturing method includes the steps of obtaining a laminated structure by alternately laminating m (where m≧2) photosensitive material precursor layers including a photosensitive material and at least one (m−1) resin layer on one another, obtaining m photosensitive material layers, where at least two interference fringes with a desired pitch and a desired slant angle are formed on each of the m photosensitive material layers, from the m photosensitive material precursor layers by irradiating the laminated structure with a reference laser light beam and an object laser light beam, and making the slant angles of the m photosensitive material layers different from each other while retaining the pitch value, which is defined on a face of the photosensitive material layer, by irradiating the laminated structure with an energy ray from the laminated structure's one face side, and heating the laminated structure.. .
|Solar concentration system using volume holograms|
An electromagnetic wave concentrating system, comprising a photovoltaic material and at least one holographic concentrator. The holographic concentrator includes at least two stacked holographic optical elements (hoe).
|Devices and methods for achieving non-contacting white state in interferometric modulators|
This disclosure provides systems, methods and apparatus for providing white light color output from an electromechanical systems (ems) device with reduced likelihood of stiction. In one aspect, interferometric modulators are configured to provide a white color output while having a non-zero modulator gap dimension.
|Image display device|
An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided..
A substrate includes a diffracting structure providing a hologram (20, 6). The diffracting structure encodes a holographic image so that thatholographic image is produced in response to reference light being incident on a major surface of the substrate at an angle of incidence with respect to the said major surface of the substrate, wherein the angle of incidence is no more than 20°..
|Display device and operating method thereof|
A display device according to embodiments of the present disclosure includes a determination unit to determine a display mode, a light generator to selectively irradiate a 2d light or a hologram 3d light, a spatial light modulator to selectively display a 2d image or a hologram 3d image, and a control unit that controls the light generator to selectively irradiate the 2d light or the hologram 3d light and controls the spatial light modulator to modulate the 2d light or the hologram 3d light irradiated from the light generator to display the 2d image or the hologram 3d image according to the display mode determined by the determination unit.. .
|Apparatus and method for displaying transmission and reflection holograms|
There is herein described apparatus and methods for displaying holograms. At least one aspect of the invention is to provide a compact and self-contained lighting system for a display hologram, which can produce high quality images and which is substantially insensitive to stray light..
|Apparatus and method for generating digital hologram|
Disclosed are an apparatus and a method for generating a digital hologram for reproducing a 3d stereoscopic image, and more particularly, an apparatus and a method for generating a digital hologram, which generate the digital hologram by receiving a depth information pre-processing process of generating first depth map information constituted by a first depth level and second depth map information constituted a second depth level by receiving color image information from an imaging unit.. .
|Fast processing of information represented in digital holograms|
Techniques for fast processing of information represented in digital holograms to facilitate generating and displaying 3-d holographic images representative of a 3-d object scene are presented. A holographic generator component (hgc) can receive or generate information representing a 3-d object scene.
|Dynamic aperture holographic multiplexing|
Systems and methods for dynamic aperture holographic multiplexing are disclosed. One example process may include recording a set of holograms in a recording medium by varying both the reference beam angular aperture and the signal beam angular aperture.
|Three-dimensional imaging system based on stereo hologram|
A three-dimensional imaging system based on a stereo hologram is disclosed. Images composed of sub-images having the same vertical-horizontal resolutions which are generated at plural image projection modules having a two-dimensional arrangement structure are projected to a prism array plate or a transmission-type diffusion plate, and are converted into light points, i.e., image points through a microlens array unit.
|Method for generating a point light source in a plane at an arbitrary location using a dynamic hologram|
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for providing a display device. In one aspect, the display device may include a light source system, a programmable hologram system, a light-turning layer and a control system.
|Visible light photoinitiating system for preparing high diffraction efficiency hologram optical polymer material|
The present invention provides a visible light photoinitiating system for preparing a holographic photopolymer material with high-diffraction efficiency. The photoinitiating system comprises a photosensitizer and a co-initiator, and its mechanism is that the photosensitizer transforms from ground state to excited state after absorbing photons, and then interacts with the co-initiator through transfer of electrons and protons, which produces an alkyl (or aryl) free radical r and a ketyl radical k; wherein the free radical r initiates the addition polymerization of monomers that are capable of free radical polymerization, whereas the radical k inhibits the chain propagation of the macromolecular free radicals to a certain degree due to the steric hindrance effect, and thus delays the gelation time of the photopolymerization, which helps to increase the phase separation between the polymer and the functional components.
Technologies are generally described for generating an image in a holographic imaging device by causing multiple reflections of a hologram reconstruction light on one side of a display panel in the holographic imaging device. An example device may include a display panel, a semi-transparent mirror layer on the display panel, a mirror layer at a side of the semi-transparent mirror layer opposite to the display panel, and a light irradiation unit opposite to the semi-transparent mirror layer.
|Apparatus and method for displaying hologram image|
Provided is an apparatus and method for displaying a hologram image that may display a hologram image created by tracking a position of a pupil of a user using an acquired user image, tracking a position of a light source of a reflection hologram image that is reflected from appearance of the user, and by correcting a position of a light source of a display hologram image based on the position of the pupil of the user.. .
|Optical information reproducing apparatus and optical information reproducing method|
A method of calculating a reliability effective in a decoding process of hologram. An optical information reproducing apparatus that reproduces information with the use of the holography includes an image acquisition unit that reproduces two-dimensional data from a hologram disc, an image equalization unit that makes the two-dimensional data equal to target data having a target pr characteristic, a soft output decoding unit that decodes output data of the image equalization unit on the basis of the pr characteristic, and outputs a decoded result having a reliability, and an error correction unit that conducts an error correction of the data on the basis of the decoded result..
|Integrated hologram optical device|
An integrated hologram optical device, a method of manufacturing the same, and an integrated hologram recording apparatus are provided. The integrated hologram optical device includes a two-dimensional (2d) array of a plurality of hogels.
|Projection-type footage display device|
A laser beam (l50) generated by a laser light source (50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (b).
|Image display device|
The image display device includes an output unit which outputs an image information light including image information; and a hologram element on which the image information light is incident, and projects the image information light via the hologram element on a retina to make a user visually recognize an image. The hologram element includes a first hologram area and a second hologram area.
|Apparatus for displaying a hologram|
An apparatus for displaying a hologram comprises: a hologram display panel that represents light having the hologram images to an observer; a detecting camera that decides a position of the observer; a deflector that forms a prism pattern to refract the light corresponding to the detected position of the observer; and a deflector driver that supplies a driving voltage corresponding to a inclined angle for forming the prism pattern, wherein the deflector includes: a plurality of first electrodes running to a first direction and divided into a plurality of electrode groups; a plurality of connection electrodes running to a second direction crossing with the first direction, and connecting same numbered first electrodes of the electrode groups, wherein each end of the connection electrodes forms a pad portion; and a second electrode facing to the plurality of the first electrodes with a liquid crystal cell therebetween.. .
|System and method for surgical telementoring and training with virtualized telestration and haptic holograms, including metadata tagging, encapsulation and saving multi-modal streaming medical imagery together with multi-dimensional [4-d] virtual mesh and multi-sensory annotation in standard file formats used for digital imaging and communications in medicine (dicom)|
The invention relates generally to a medical apparatus and method of using the same for receiving and transmitting streaming medical imagery and audio signals in real time, and allowing remote operators to annotate and telestrate with same. The invention acquires streaming medical imagery and audio signals through a telestreamer input device, allowing users to electronically collaborate, generally by telestrating, annotating, and sketching image overlays on streaming medical imagery.
|Multiplexed hologram tiling in a waveguide display|
Embodiments related near-eye display devices having angularly multiplexed holograms are disclosed. One disclosed embodiment provides a near-eye display device including an image source, a waveguide, and a controller.
|Single pass hogel rendering|
A system and method are provided for rendering a hogel in a single rendering pass. Data representative of a geometric shape having multiple vertices are processed to determine if the geometric shape has at least one vertex on a first side and at least one vertex on a second side of a hologram plane.
|Foil composite card|
Composite cards formed in accordance with the invention include a security layer comprising a hologram or diffraction grating formed at, or in, the center, or core layer, of the card. The hologram may be formed by embossing a designated area of the core layer with a diffraction pattern and depositing a thin layer of metal on the embossed layer.
|Optical information recording and reproduction device, optical information recording device, method for recording and reproducing optical information and optical information recording medium|
The present invention provides a technology which estimates the most suitable cure time which changes with the environment when recording a hologram and adjusts the cure time in real time, thereby enabling a suitable pre-cure or post-cure. When irradiating an optical information recording medium with cure light, the light transmitted from the optical information recording medium is detected by a detector and the irradiation time is adjusted by continuing irradiation until the intensity of the transmitted light detected exceeds a prescribed reference value..
|Image displaying apparatus and optical apparatus|
The image displaying apparatus includes an image production apparatus, a first light conduction section and a second light conduction section. The first light conduction section includes a first light conduction plate which propagates part of incident light thereto by total reflection in the inside thereof and emits the propagated light, and a reflection type volume hologram diffraction grating disposed on the first light conduction plate.
|Holographic imaging optical device|
In relation to a field of creating and processing a digital image, a compact portable device for generation and observation of dynamic and static holograms is provided. A system including a holographic display may be based on reconstruction and transmission of a wavefront encoded with a spatial light modulator while preserving information about a wave amplitude and a phase.
|Novel method of fast fourier transform (fft) analysis using waveform-embedded or waveform-modulated coherent beams and holograms|
Method of fast fourier transform (fft) analysis for collecting waveforms and other vibrational intelligence and modulating or embedding same into one or more coherent reference beams of an n-dimensional holographic recording device for producing one or more holograms of objects, including singularity points in space. The result provides wholesale differentiation of waveforms distinguishable from others based on their spectral characteristics.
|Holographic image identification apparatus and method, and holographic image selective reconstruction apparatus, method and system|
Disclosed is an apparatus for identifying authenticity of a holographic image, which is capable of identifying the authenticity by comparing a holographic image reconstructed by irradiating light having the same characteristic as an irradiation characteristic of a first reference beam used in generating the holographic image with an original image. Accordingly, since an image or a pattern is recorded by using a reference beam having a specific angle and a specific laser wavelength band in making a hologram, replication or copying for forgery is prevented from being easy..
An identification medium cannot be reused when an attempt has been made to remove it from an object by using solvent. A cholesteric liquid crystal layer subjected to a hologram processing is formed while contacting a cop (cycloolefin polymer) layer.
|Method for preparing colorful three-dimensional hologram based on holographic polymer dispersed liquid crystal grating|
A method for preparing a colorful three-dimensional hologram based on holographic polymer dispersed liquid crystal gratings comprises: first, in a 441.6 nm laser interference field, preparing with holography a holographic master (7) which stores the reflected (or transmitted) light wave information (amplitude and phase) of an object captured; then using an object light (6) to irradiate the holographic master at a bragg angle to generate a diffraction light (8); and using the diffraction light and a reference light (10) to simultaneously irradiate a holographic base board (9) comprising a photosensitizer, a co-initiator, a monomer capable of free radical polymerization , and a liquid crystal so that, when total optical paths of the two laser beams reaching the holographic base board are equivalent to each other, optical coherence occurs between the two laser beams on the holographic base board, thereby obtaining a colorful three-dimensional hologram based on holographic polymer dispersed liquid crystal gratings from which an image of the captured object can be observed in the sunlight.. .
|Direct hologram manipulation using imu|
Methods for controlling an augmented reality environment associated with a head-mounted display device (hmd) are described. In some embodiments, a virtual pointer may be displayed to an end user of the hmd and controlled by the end user using motion and/or orientation information associated with a secondary device (e.g., a mobile phone).
|Apparatus and method for generating hologram pattern|
Provided is an apparatus and method for generating a hologram pattern with a reduced amount of computation. The apparatus may include a reference depth layer setting unit configured or having a capacity to set a reference depth layer using data associated with a three-dimensional (3d) object, a first hologram pattern generating unit configured to generate a first hologram pattern corresponding to the 3d object in the reference depth layer, and a second hologram pattern generating unit configured to generate a second hologram pattern in a hologram plane using the first hologram pattern..
|Transparent holographic display with dynamic image control|
Generally, this disclosure provides systems and methods for generating three dimensional holographic images on a transparent display screen with dynamic image control. The system may include a transparent display screen that includes an array of pixels; a driver circuit configured to control each of the pixels in the array of pixels such that the transparent display screen displays an interference fringe pattern, the interference fringe pattern associated with a hologram; and a coherent light source configured to illuminate the transparent display screen with coherent light, wherein transformation of the coherent light by the interference fringe pattern generates a three dimensional holographic image..
|Process for forming rainbow and hologram images on papers|
A process is provided for embossing a fibrous sheet with rainbow or hologram images, without the use of elevated temperatures, or the use of pre-wetting or softening agents.. .
|Photorefractive polymer composite, and photorefractive device and hologram display device including the same|
Provided are a photorefractive polymer composite, and a photorefractive devices and hologram display device including the same. The photorefractive polymer composite includes a photoconductive polymer matrix, a nonlinear optical chromophore, a plasticizer, and a graphite-based photocharge generator..
|Optical head for hologram optical apparatus and method of operating the same|
An optical head for a hologram optical apparatus and a method of operating the same are provided. The optical head for the hologram optical apparatus includes a reference light unit for guiding reference light, a signal light unit for guiding signal light, and a light source unit for providing 1 the reference light and the signal light to the reference light unit and the signal light unit, wherein the reference light unit and the signal light unit are stacked.
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.
|Holographic image generation and reconstruction|
Technologies are generally described for generating and recording holograms of an object using a plurality of light sources and an array of image sensors arranged to surround the object. In various examples, an apparatus may be configured to irradiate a plurality of light beams from multiple light sources to a corresponding number of beam splitters, which are configured to generate a first portion of the light beams that can be irradiated on the object, and a second portion of the light beams that can be reflected by a mirror unit to generate reference beams.
|Method of processing a security item|
There is disclosed a method of processing a security item 1. The security item comprises a holographic security feature 2 having at least one metallised layer.
|Photopolymer composition for recording hologram, and photopolymer layer and hologram recording media including the same|
A photopolymer composition includes a polymer binder; a monomer for holographic recording; a photoinitiation system including an electron acceptor, at least one of an electron donor and a hydrogen atom donor, and a dye-sensitizer; and a solvent. The monomer for holographic recording includes n-acryloylthiomorpholine..
|3d led output device and process for emitting 3d content output for large screen applications and which is visible without 3d glasses|
Some embodiments of the invention include a novel process for emitting 3d content that is visible without 3d eye-wear. In some embodiments, the process utilizes a 3d led output device which emits 3d content that is visible without 3d eye-wear.
|Holographic reconstructing device and application adapted to portable electronic products|
Disclosed are a holographic reconstructing device and its application for portable electronic products. The holographic reconstructing device includes a compound hologram (9), a hologram seat (91), and a rebuilding light source (12).
|Digital hologram display device|
The present disclosure relates to a digital hologram display device displaying 3d image as a hologram by using a complex modulation. The digital hologram display device comprising a spatial light modulator including a first pixel outputting a first modulation light by modulating a phase of a first plane-polarized light and a second pixel outputting a second modulation light by modulating the phase of the first plane-polarized light, wherein the second pixel is adjacent to the first pixel; and a light combiner changing a path of the first modulation light outputted from the first pixel so that the path of the first modulation light corresponds to a path of the second modulation light outputted from the second pixel for combining the first modulation light with the second modulation light, wherein a phase of the first modulation light is different from a phase of the second modulation light..
|Grey-scale holographic structure and system for generating a millimeter-wave collimated wavefront in a compact range|
Embodiments of a grey-scale holographic structure and system for generating a collimated wavefront in a compact range are generally described herein. In some embodiments, the grey-scale holographic structure comprising millimeter-wave transmissive material having a surface arranged to provide differing amounts of phase-delay to an incident millimeter-wave wavefront as the incident wavefront passes through the material.
|Multi-layer body, method for producing it, and production of forgery-proof documents using said multi-layer body|
A multi-layer body (1, 21) is described, having a carrier film (7), a release layer (8), an embossed hologram layer (9) and a vapour-deposited reflection layer (10), a uv-activatable adhesive layer (4) with at least one partially activated uv adhesive-layer zone (5, 6) and a lower layer, wherein the cured adhesive regions (5) connect the lower layer and parts of the embossed hologram layer to one another inseparably, the lower layer being a transparent polycarbonate film (2), while the cured adhesive region (5) is arranged on the periphery of the uncured adhesive region (6) of the respective adhesive-layer zone (4) and surrounds it in a frame-like manner. In addition, the production of forgery-proof documents using the multi-layer body (1, 21) is described, in which the uncured adhesive-layer region (6) of said multi-layer body (1, 21) is partially cured with light through an information-carrying optical mask (13) at the user's premises, after which the carrier film is pulled off together with the release layer and the non-bonded embossed hologram layer regions (11), an upper protective film (18) is applied to the individualized embossed hologram layer (9), and said film composite is hot-pressed together with further films (19)..
|Printing diffraction gratings on paper and board|
A method and an apparatus for forming a surface relief microstructure, especially an optically variable image on a paper substrate are provided, the method comprising the steps of: a) applying a curable composition to at least a portion of the frontside of the paper substrate; b) contacting at least a portion of the curable composition with surface relief microstructure, especially optically variable image forming means; c) curing the composition by using at least one uv lamp (1, 2, 3) which is arranged on the backside of the paper substrate; d) optionally depositing a layer of a transparent high refractive index material and/or a metallic layer on at least a portion of the cured composition, wherein the lamp (1, 2, 3) having emission peak(s) in the uv-a and near vis range and the curable composition comprises at least a photoinitiator which absorbs in the uv-a region and preferably in the near vis range. A paper product obtainable uses the method and an apparatus for forming a surface relief microstructure on a paper substrate.
|Method of production of a holographic sensor|
A method for the production of a holographic sensor which comprises a support medium supporting a reflection hologram wherein the support medium interacts with its physical or chemical environment to create an optical response which is a change in one or more optical properties of the hologram, the method comprising the steps of: a) introducing a colloidal dispersion of a recording material into the support medium; and b) ablating the colloidal particles of the recording material using a pulsed laser to form the holographic element in the support medium. The method of production can be used to introduce a reflection holographic grating into a hydrophobic support medium, in particular, polydimethylsiloxane (pdms), which possesses an extraordinary ability to swell in the presence of both liquid and/or gaseous low molecular weight hydrocarbons and organic solvents and thus has many applications as a holographic sensor..
|Optically addressable spatial light modulator divided into plurality of segments, and holographic three-dimensional image display apparatus and method using the light modulator|
Provided are an optically addressable spatial light modulator (oaslm) divided into a plurality of segments, and an apparatus and method for displaying a holographic three-dimensional (3d) image using the oaslm. The holographic 3d image display apparatus includes a first light source which emits a write beam, an electric addressable spatial light modulator (easlm) which modulates the write beam emitted from the first light source according to hologram information regarding a 3d image, a second light source which emits a read beam, an oaslm which receives the write beam modulated by the easlm and modulates the read beam emitted from the second light source according to hologram information included in the modulated write beam, a scanning optical unit which projects the write beam modulated by the easlm onto the oaslm, and a fourier lens which focuses the read beam modulated by the oaslm onto a predetermined space to form the 3d image..
|Projection type image display device|
A projection type image display device according to the present invention includes: a light source that emits coherent light; an optical scanning section that scans the coherent light emitted from the light source; an lcos that has an image formation area in which an image is formed; a projection optical system that projects an image formed on the image formation area on a screen; and a hologram that has polarization selectivity and diffuses scanning light scanned by the optical scanning section so as to allow diffusion light emitted from respective points thereof to illuminate the image formation area in an overlapping manner.. .
|Method and system for processing hologram data using hologram fringe data format adaptive to data encoding scheme|
A hologram data processing method using a hologram fringe data format adaptive to a data encoding scheme includes configuring model data of a three-dimensional (3d) object corresponding to source data to be used for generating a hologram, computing hologram fringe data by applying a diffraction transform to a light wave transferred to a hologram plane based on the model data of the 3d object, setting, in the computed hologram fringe data, the hologram fringe data format adaptive to a data encoding scheme for reconstructing the hologram, reconstructing an optical hologram by applying the data encoding scheme to the hologram fringe data, and adjusting the optical hologram by comparing a reconstructed image of the optical hologram to a reconstructed image of a numerical hologram.. .
|System, apparatus and method for extracting image cross-sections of an object from received electromagnetic radiation|
An apparatus and method to produce a hologram of a cross-section of an object includes an electromagnetic radiation assembly configured to receive a received electromagnetic radiation, such as light, from the object. The electromagnetic radiation assembly is further configured to diffract the received electromagnetic radiation and transmit a diffracted electromagnetic radiation.
|Optical information recording device and method|
In an optical information recording device and optical information recording method for angularly multiplexing and recording data on pages on the same recording region on a hologram disk, data on each page is sequentially generated by sequentially dividing input data in predetermined units, the pages to be recorded on the same recording region are divided into page groups so that pages to be recorded adjacently by the angular multiplexing may not belong to the same group, each page group is individually subjected to inter-page coding processing for computing an error-correcting code and adding the computed error-correcting code, and data on the pages subjected to the inter-page coding processing is angularly multiplexed and recorded on the hologram disk.. .
|Generating and displaying holograms|
Techniques for generating 3-d holographic images of a 3-d real or synthetic object scene are presented. A holographic generator component (hgc) can obtain a real or synthetic 3-d object scene.
|Apparatus for recording and reproducing hologram|
A hologram recording and reproducing apparatus including: a coherent light source; a beam splitter which splits a beam emitted from the coherent light source into a signal beam and a reference beam; a signal beam forming unit which modulates the signal beam split and directs the modulated signal beam onto a hologram recording medium; and a reference beam forming unit which directs the reference beam to be irradiated onto a location on the hologram recording medium which overlaps with a location on the hologram recording medium on which the signal beam is incident, wherein the signal beam forming unit includes: a first light guide member which transmits the signal beam split by the beam splitter; a spatial light modulator (slm) which modulates the signal beam transmitted through the first light guide member; and a holographic fourier transformation optical device which focuses the modulated signal beam onto the hologram recording medium.. .
|Phase mask and holographic recording apparatus employing the same|
A phase mask includes a phase modulation layer that modulates a phase of different portions of incident light, differently, such that a different optical phase delay, in a range between 0 and 2π is imparted to different portions of the incident light. A hologram recording apparatus includes a light source; a signal beam optical system that divides a beam emitted from the light source into a reference beam and a signal beam, modulates the signal beam according to hologram pixel information, and radiates the signal beam onto a hologram recording medium.
|Laminated body having hologram|
A card 1 includes: a card substrate 10; a transparent hologram layer 20 on a part of the substrate 10; and a surface layer 30 comprising a print layer 40 on the substrate 10 and the layer 20, is formed by a transparent material, and is printed with a color similar to the upper surface of the substrate 10. When a card surface 1a is viewed from the normal line, the layer 40 has the same color shading compared to the upper surface of the substrate 10, at the edge portion 22 of the layer 20.
|Device and method for omnidirectional image display|
The invention generally relates to the display of images viewable from any direction and devices therefor. In some aspects, the invention provides an apparatus for displaying a hologram-like image.
|Optical recording medium and method for manufacturing optical recording medium|
An optical recording medium includes a first transparent film layer, a second transparent film layer, and a recording material layer sandwiched between the first transparent film layer and the second transparent film layer. The recording material layer includes a hologram recording material..
|Optical information recording/reproducing apparatus|
An optical information recording/reproducing apparatus, to apply holograms of an angle multiplex recording method therein includes: a light source to emit a light beam; a divider unit to divide the light beam into a signal beam and a reference light; an angle variable unit to change an angle of the reference light incident upon an optical information recording medium; a spatial light modulator unit to add information to the signal beam; an objective lens to irradiate the signal beam on the medium; an image pickup unit to detect a diffracted light generating from a recording region, when the reference light is irradiated on the medium; and an optical element to shape a form of light flux of the reference light, so that a light flux diameter of the reference light in a multiplex direction becomes larger than the light flux diameter of the reference light in a pitch direction.. .
|Photopolymer formulation for producing holographic media|
The invention relates to a photopolymer formulation, comprising at least one polyol component, a polyisocyanate component, a write monomer, a photoinitiator, and a catalyst, wherein the photopolymer formulation has an activation temperature >8300 k. The invention further relates to a method for producing a holographic medium, to a holographic medium that can be obtained according to the method according to the invention, and to the use of a holographic medium according to the invention for producing a hologram..
|Stacked film threshold component, device, and method of manufacture|
A component includes a micro-hologram layer, where the micro-hologram layer includes layers inert to light interleaved with layers of functional film. The functional film layers are made of a material that undergoes a change in its refractive index when illuminated by a light beam, yet undergoes no change in its refractive index when illuminated by a different light beam.
|Hologram authentication system|
An authentication system includes a first hologram, a second hologram, a light source, and an image pickup device. In this case, the first hologram is a transmission hologram for causing interference with data of the second hologram in order to authenticate the second hologram, the second hologram is a reflection hologram to be authenticated, and light from the light source is reflected by the second hologram, the reflected light is irradiated to the first hologram as reference light for the first hologram.
|Method and apparatus for producing black dye pigment|
A method for recording a volume transmission hologram having angularly multiplexed diffraction fringe patterns that can cooperate to display polychromatic images and can be recorded with a single wavelength exposure source.. .
|Holographic memory apparatus and method for adjusting incident angle of reference beam|
A holographic memory apparatus includes an optical detector which receives reflected light of reference beam from the surface of a hologram recording medium. An incident angle of the reference beam is estimated on the basis of information on a focused position on the optical detector.
|Method and arrangement for short coherence holography|
The invention relates to a method and arrangement for short coherence holography for distance measurement, for profile detection and/or for 3d detection of one or more object elements and/or object areas and/or objects or for readout of holographic volume memories with a holographic interferometer and with at least one short coherence light source. For each optically detected object element in the hologram the holographic interferometer has an optical path difference clearly unequal to zero.
In an identification medium, switching of images can be clearly observed, and the medium has a structure produced at low cost. The structure comprises a cholesteric liquid crystal layer 102 in which a hologram is formed, and which selectively reflects circularly polarized light of a specific rotating direction of a specific central wavelength, a cholesteric liquid crystal layer reflecting the entire range of visible light 105 which has reflection characteristics equivalent to a case of reflecting the entire range of visible light and which reflects circularly polarized light of the same rotating direction as the circularly polarized light reflected from the cholesteric liquid crystal layer 102, and a display pattern 106 having a specific content displayed, arranged in this order, as seen from the side of observation..
|Generating full-parallax digital holograms|
Techniques for efficiently generating full parallax 3-d holographic images of a 3-d real or synthetic object scene are presented. A holographic generator component (hgc) can receive a real object scene or generate a synthetic object scene.