|| List of recent Hologram-related patents
|Fish shaped lure for trolling|
Transfer sheets on which an image quite closely resembling an external appearance of a bait fish is color printed on the surface of a hologram sheet are adhered to back sides of bilaterally symmetrical body-half segments made of a flexible transparent thermoplastic resin in a state that the image can be viewed perspectively from the surface side. Only front head sides which occupy at least half in both the body-half segments are adhered and remaining rear end sides are kept open, by which a line equipped with a hook is guided out and wired to the front from the rear end sides via an interior hollow of a lure body..
|Display device using computer generated hologram|
The instant application discloses a display device including a pattern generator configured to generate a diffraction pattern from an image; a light source configured to emit emission light; an optical condenser which condenses the emission light to generate illumination light; and a spatial light modulator which diffracts the illumination light according to the diffraction pattern to generate diffracted light. The diffracted light passes through the optical condenser..
|Illuminating device using coherent light source|
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).
|Illuminating method using coherent light source|
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 reading device|
An image reading device having a conveying unit for conveying an irradiated member that has a hologram area in a conveying direction; a first light source for applying light to an irradiated part in the hologram area; and a second light source separated from the first light source along the conveying direction and applying light to an irradiated part in the hologram area when the hologram area is conveyed by a prescribed distance. An irradiation angle at which the irradiated part is irradiated with the light of the first light source is made to be different from an irradiation angle at which the irradiated part is irradiated with the light of the second light source when the hologram part is conveyed by the prescribed distance.
|Hologram anchoring and dynamic positioning|
A system and method are disclosed for displaying virtual objects in a mixed reality environment in a way that is optimal and most comfortable for a user to interact with the virtual objects. When a user is moving through the mixed reality environment, the virtual objects may remain world-locked, so that the user can move around and explore the virtual objects from different perspectives.
|Volume hologram, manufacturing method thereof, and shift method of wavelength spectrum of diffracted light|
A manufacturing method of the volume hologram includes a step of hologram recording for recording information to a hologram recording layer and a pressing step of the hologram recording layer for pressing at least a portion of the hologram recording layer recorded with the information. In the step of pressing the hologram recording layer, the hologram recording layer recorded with information may change..
|Projection apparatus and hologram recording medium|
A projection apparatus has a hologram recording medium configured to be capable of diffusing coherent light beams, an irradiation unit configured to irradiate coherent light beams to the hologram recording medium so that the coherent light beams scan the hologram recording medium, a light modulator that is illuminated by coherent light beams incident on and diffused at respective points of the hologram recording medium from the irradiation unit, a projection optical system configured to project a modulated image generated by the light modulator onto a scattering plane, and an imaging optical system provided between the hologram recording medium and the light modulator, configured to converge the coherent light beams diffused at respective points of the hologram recording medium to illuminate the light modulator.. .
Provided is a display device. The display device includes a backlight unit generating a plurality of flat lights and a spatial light modulator (slm) unit generating an interference pattern by using the plurality of lights according to hologram data and displaying a hologram based on the generated interference pattern.
|Hologram processing method and system|
The invention relates to a hologram, or holographic intensity data, processing method and system. The system implements the method which comprises receiving holographic intensity data comprising at least a holographic intensity pattern or image at a discrete location in a propagation space, the propagation space comprising the three-dimensional space over which light waves or illumination forming the holographic intensity pattern propagates.
|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.
|Method for preparing a hologram recording medium|
Two original images to be recorded are prepared as data (s10). A plurality of unit regions, each having an adequate area to record interference fringes of visible light, are defined and positioned on a hologram recording surface (s20).
|Portable digital holographic probe for the inspection of optical fiber connectors, and inspection system and method for the same|
A portable inspection probe for the inspection of a recessed mating surface of an optical fiber connector is provided. In one variant, the portable inspection probe includes a digital holographic detection module operable to digitally record a hologram of the recessed mating surface, and a rigid probe tip configured to be optically coupled to the digital holographic detection module and shaped to provide optical access to the recessed mating surface.
|Apparatus for producing a hologram|
An apparatus for producing a hologram includes a collimation lens configured to receive incoherent light emitted from an object; a spatial light modulator (slm) that includes at least one diffractive lens which is configured to receive the incoherent light from the collimation lens and split the incoherent light into two beams that interfere with each other; and a camera configured to record the interference pattern of the two beams to create a hologram, wherein a ratio between a distance from the slm to the camera and a focal length of the diffractive lens is greater than 1.. .
|Optical head device and optical disc device|
An optical component, a hologram, and a photodetector are configured in an optical head device of an optical disc device such that a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in the intended information recording layer strikes the interior of the light-receiving surfaces of the tracking error detection light-receiving sections, a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in an information recording layer one layer deeper than the intended information recording layer strikes outside the light-receiving sections, and a +1-order beam or a −1-order beam of diffracted light that is generated from light reflected from an information track in an information recording layer one layer shallower than the intended information recording layer strikes outside the light-receiving sections.. .
|Digital hologram synthesis method and apparatus|
Provided are a digital hologram synthesis method and apparatus based on an angular spectrum. The digital hologram synthesis method includes representing an input digital hologram as at least one angular spectrum region by applying fourier transformation to the input digital hologram, registering the at least one angular spectrum region by projecting the at least one angular spectrum region onto a spherical surface, and generating a synthesis digital hologram based on the registered at least one angular spectrum region.
|Augmented reality auction platform|
An augmented reality submission includes a hologram to virtually augment a world space object and a compensation offer for presenting the hologram to a viewer of the world space object. The augmented reality submission is selected as a winning submission if the submission satisfies a selection criteria..
|Apparatus and method for generating hologram pattern|
A method and apparatus for generating a hologram pattern using depth quantization may generate a hologram pattern corresponding to a three-dimensional (3d) object in a hologram plane using color image information of the 3d object and a point of the 3d object included in a quantized depth layer.. .
|Optical information recording/reproducing apparatus and optical information recording/reproducing method|
An optical information recording/reproducing apparatus for recording an interference pattern between signal light and reference light information-multiplexed as a hologram in an optical information recording medium and for reproducing information recorded in the optical information recording medium on the basis of the recorded hologram with use of the reference light. The apparatus includes a light source for emitting light and a coherency controller for controlling a coherency of the light source.
|Method and apparatus for generating hologram based on multi-view image|
Disclosed are a method and apparatus for generating a hologram based on a multi-view image. The method of generating a hologram image may include receiving a multi-view image and calculating depth information about an image at each view of the multi-view image, calculating an integrated 3-d space datum based on the multi-view image and the pieces of depth information, and generating hologram information from the integrated 3-d space datum.
|Holography 3d display|
The present disclosure relates to a holography three dimensional display in which no 3d cross-talk problem is arisen. The present disclosure suggests an apparatus for displaying hologram images comprising: a display panel displaying a hologram image; a back light unit disposed at one side of the display panel for supplying a back light; a first light path deflecting cell disposed at another side of the display panel facing away from the back light unit for forming a first prism pattern along a first direction rotating by a predetermined angle from a horizontal axis of the display panel; and a second light path deflecting cell disposed in front of the first light path deflecting cell for forming a second prism pattern along a second direction perpendicular to the first direction..
|Holographic medium having a protective layer|
This invention relates to a holographic medium comprising a protective layer and a photopolymer film which is bonded to the protective layer and contains polyurethane matrix polymers, acrylate writing monomers and photoinitiators, wherein the protective layer is impermeable to the constituents of the photopolymer film, is optically clear and is transparent to electromagnetic radiation having a wavelength in the range of from 350 to 800 nm. The invention further provides the use of a holographic medium according to the invention in the production of holograms, and a process for the production of a holographic medium according to the invention..
|Optical device and virtual image display|
An optical device includes: a light guide plate receiving, for each of n types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes n types of interference fringes each corresponding to the n types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘p>l’, where ‘l’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘p’ represents a peak wavelength of the parallel light beams..
|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.
|Course integral holographic display|
A holographic display system for generating a super hologram with full parallax in different fields of view in the horizontal and vertical directions. The system includes an array of holographic display devices, e.g., spatial light modulators (slms), operable to provide a plurality of holographic images of a scene from differing viewpoints of the scene.
|Method and apparatus for holographic recording|
Provided is a holographic recording method in which an interference fringe between a reference beam and a signal beam, modulated according to information regarding a plurality of hologram pixels, is recorded on a holographic recording medium, the holographic recording method including multiplexing-recording the interference fringe of the plurality of hologram pixels such that at least a part of the interference fringe recorded of neighboring hologram pixels of the plurality of hologram pixels is overlapped.. .
|Random-type multilayer identification, and system using same|
A random-type multilayer identifier uses an identification pattern that is formed by irregularly-dispersed identification particles as unique information and is configured in such a manner that two or more identification layers made out of a transparent material are stacked each other, and besides, has an advantage that significantly reduces the duplication possibility of an existing identifier provided in a printed manner, such as a qr code, a barcode, a hologram, etc., because multiple identification layers having the irregularly-dispersed identification particles are stacked each other and recognized as two-dimensional data.. .
|Image recovery from single shot digital hologram|
Techniques described herein are generally related to high resolution image recovery of objects from digital holograms. The various described techniques may be applied to methods, systems, devices or combinations thereof.
|Time-gated image reconstruction using phase conjugation|
A method and system are described for illuminating a target with a laser source with a wide-area illuminating beam. A conjugator can receive a reflected, imprinted wavefront from the target that is imprinted with effects from beam distortions and obstructions between the laser source and the target.
|Apparatus and method for generating interference fringe pattern|
An apparatus for generating holograms includes a laser source configured to emit a laser beam with a frequency of v; an acoustic optical modulator configured to generate, from the laser beam, a first beam with a frequency of v1 and a second beam with a frequency of v2; a first beam splitter configured to split the first beam into a first reference beam and a first object beam, the first object beam being led to a sample; a second beam splitter configured to split the second beam into a second reference beam and a second object beam, the second object beam being led to the sample; and a detector configured to detect an image composed of a first fringe, based on the first reference beam and the first object beam, and a second fringe, based on the second reference beam and the second object beam.. .
|Light shaping for imaging using holography|
A plurality of light sources of different wavelength bands can be provided. An imaging device can be configured to modulate incoming light according to video image data and output modulated light.
|Hologram generating apparatus|
A hologram generating apparatus and method. In one embodiment of the apparatus includes a base and a rigid platform.
|Image photography method, image photography play method, spatial lighting modulator, image play device, and digital hologram forming device|
Submitted is an image photography play method which is suited to playing a stereoscopic video. The image photography method comprises: a step of forming a hologram pattern from a reference light and a subject light; a step of digitally processing the obtained hologram pattern; a step of writing the digitized hologram pattern as a magnetized vector pattern to a spatial lighting modulator which is formed from a magneto-optical material; and a step of inputting linearly polarized light into the spatial lighting modulator and playing an image according to the digitized hologram pattern..
|System for order alignment of diffractively produced images|
A system for order alignment of diffractively produced images is provided. The system comprises: a diffractive spatial light modulator (dslm) configured to provide a computer generated hologram of an image; a substantially coherent light source configured to illuminate the dslm which responsively produces the image along each of different diffractive order paths; and, at least one set of optical components located along respective diffractive order paths of the dslm, the at least one set of optical components configured to align at least one respective image diffracted from the dslm with at least another diffracted image at a common image plane..
|Sensor-monitored, 3d, interactive holographic freespace control unit (hfcu) and associated components|
A sensor/camera-monitored, virtual image or holographic-type display device is provided and called a sensor-monitored, 3d, interactive holographic freespace control unit (hfcu). This invention allows user interactions with the virtual-images or holograms without contacting any physical surface; it is achieved via the use of a visually bounded freespace both with and without holographic-type assistance.
|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.. .