Abstract: An apparatus and method for reconstructing a hologram are disclosed. An illuminator emits a reference beam, a hologram display driver displays an interference pattern based on a video signal, a lens unit adjusts a magnification and a focus of a hologram reproduced by projecting the emitted reference beam onto the displayed interference pattern, and a scanning unit scans the adjusted hologram to pixels of a screen by controlling a direction of the adjusted hologram.

Abstract: An optical phased array includes, in part, a multitude of optical signal emitters and a multitude of optical signal phase/delay elements each associated with and disposed between a different pair of the optical signal emitters. Each optical signal phase/delay element is adapted to cause a phase/delay shift between the optical signals emitted from its associated pair of optical signal emitters. Each optical signal phase/delay element is optically a ring resonator that includes a p-i-n junction. By varying the bias applied to the p-i-n junction, the phase/delay generated by the ring resonator is varied. Furthermore, each optical signal emitter is optionally an optical grating having a multitude of grooves. The groove lengths of the optical gratings are optionally selected so as to increase along the direction of travel of the input optical signal through the optical phase array.

Abstract: A display comprising an observer window, which in 3D and/or 2D representation mode of a 3D scene can be adapted to changing eye positions. Several observers can use the display simultaneously. The display includes a light modulation device having an actuatable diffraction unit and a controllable spatial light modulator, in which a 3D scene is coded in an actuatable manner, and a control unit. An observer window can be generated using coherent light beams on alternating eye positions. The diffraction unit includes at least electrodes and a controllable material into which a prism and/or lens function and/or scatter function can be written as a diffraction grating with a phase progression in an at least one-dimensionally controllable manner.

Abstract: A light beam collimated by illumination optics (4) from a radiation source (6) illuminates the surface of a wave front modulator (8) such as an Spatial Light Modulator (SLM) or Computer Generated Hologram photomask (CGH). The resulting wave travels via projection optics (10) to the substrate (12), passing through a projection lens assembly (14). The SLM (8) is programmed or CGH configured with a modulation pattern that is determined by the substrate (12) topography and desired pattern. The substrate topography is provided by Digital Holography (DH) surface profilometery performed by a DH microscope (18), which provides geometrical or topographical input to the CGH calculation routines (16). An arrangement for vertical or sloping surface patterning has a grating (22) superimposed onto the CGH pattern (24) to generate +1 and ?1 orders.

Abstract: A holographic content providing method, and a holographic content providing apparatus and a display apparatus using the method may capture and generate holographic content using a real object, a virtual object and lighting information, and may conduct integrated processing on the generated holographic content, such as direct edition, advance visualization, data format conversion, element technologies for optical reconstruction and manufacture process management techniques of holographic content, thereby producing ultrahigh-quality interactive holographic content.

Abstract: Provided is an illumination device which illuminates an illuminated zone with a plurality of coherent light beams having mutually different wavelength ranges, so that it is possible to allow speckles to be inconspicuous. A illumination device is configured to include an optical element including a hologram recording medium and an irradiation device which illuminates the optical element with a plurality of coherent light beams having mutually different wavelength ranges so as to allow a first and second coherent light beams having different wavelength ranges to scan the hologram recording medium of the optical element. The first coherent light beams incident on respective positions of the hologram recording medium are allowed to reproduce an image superimposed on an illuminated zone, and the second coherent light beams incident on the respective positions of the hologram recording medium are allowed to reproduce an image superimposed on the illuminated zone.

Abstract: Provided are an apparatus and a method for displaying a hologram image based on pupil tracking, wherein a hologram image display apparatus includes a location determiner to determine a location of a user using a captured image of the user and a hologram information reconstructor to reconstruct first hologram information as second hologram information optimized for the location of the user to reproduce the hologram image.

Abstract: Fast processing of information represented in digital holograms is provided to facilitate generating a phase-only hologram for displaying 3-D holographic images representative of a 3-D object scene on a display device. A holographic generator component (HGC) can receive or generate visual images, comprising depth and parallax information, of a 3-D object scene. A hologram processor component can downsample an intensity image of a visual image of the 3-D object scene using a uniform or random lattice to facilitate converting the intensity image to a sparse image. The hologram processor component can generate a complex 3-D Fresnel hologram, comprising the depth and parallax information, based on the sparse image using a fast hologram generation algorithm. The hologram processor component modify the magnitude of the pixels of the complex hologram to a defined homogeneous value to facilitate converting the complex hologram to a phase-only hologram.

Abstract: A hologram is constructed from individual subholograms assigned to corresponding encoding regions in a light modulation device and respectively assigned to an object point of the object to be reconstructed with the hologram. With a virtual observer window, a defined viewing region is provided through which a reconstructed scene in a reconstruction space is observed by an observer. A complex value of a wavefront for each individual object point is calculated in the virtual observer window. Each individual amplitude of a complex value of a wavefront in the virtual observer window is subsequently multiplied by a correction value with which a correction of the angle selectivity of at least one volume grating arranged downstream in the beam path of the light modulation device is carried out. The corrected complex values determined in this way for all object points are summed and transformed into the hologram plane of the light modulation device.

Abstract: A holographic structure, system and method project a grey-scale image in a narrow IR spectral band that is related to a broadband thermal signature of an object. The projected grey-scale image, when integrated over the broadband, forms either a decoy that approximates the thermal signature of the object or a mask that obscures the thermal signature of the object. The projected image is a tuned phase recording of a desired far field projection. In different embodiments, the projected image is a “positive” or a “negative” image of the object's thermal signature, a difference image between the thermal signatures of a false object and the object or a camouflage image of random features having approximately the same spatial frequency as the object's thermal signature. The goal being to confuse or fool, even for a short period of time, the warfighting or surveillance system or human observer that uses a broadband IR sensor to acquire and view thermal images of the scene.

Abstract: A reddish collimated beam and a greenish collimated beam respectively emitted from one and another light emitters are separately radiated to different conversion regions of a phase modulation array. In the phase modulation array, phases of components of light are converted through a plurality of pixels, thereby obtaining a modulated beam that is an interfered beam. An image of the modulated beam is formed on a screen to generate a holographic image. The one light emitter and the other light emitter are each configured as a separate block, stacked one on top of another on a reference base, and separately positioned and secured.

Abstract: The phase of laser light is modulated by a phase modulating array, and a hologram image is projected on a rotating screen. Light emission of the laser light is driven by PWM modulation so that a light emission period and a non-light emission period following the light emission period are repeated. In a case where the luminance of the hologram image is changed, the duty ratio of the light emission period is changed. In a case where the luminance is significantly reduced, the light emission intensity of the laser light is reduced without changing the duty ratio. Since the duty ratio is not reduced, a light diffusion condition on the rotating screen can be randomized even in a case where the luminance is reduced.

Abstract: A holographic display system for generating a super hologram with full parallax in different fields of view in the horizontal and vertical directions. The display system includes assemblies or subsystems each adapted to combine holographic displays and coarse integral displays to produce or display a coarse integral hologram. The display system is adapted to combine such displays or display systems to add more detail or information. For example, the display system can be assembled as if it were made up of “holographic bricks” that can be stacked and combined to provide a unique image/output. Briefly, the display system described herein teaches techniques for combining coarse integral holographic (CIH) displays in a seamless and scalable manner, e.g., a display system where multiple spatial light modulators (SLMs) can be placed or provided behind coarse integral optics.

Abstract: A holographic image display system comprises a screen, a first and a second light source, a scanning mechanism, and a controller. The screen includes a photochromic material arranged thereon. The photochromic material has light absorption characteristics which change depending on illumination with a wavelength of an ultraviolet light beam. The first light source directs a visible light beam with a sufficiently large diameter onto the screen, whereas the second light source directs an ultraviolet light beam onto the screen through the scanning mechanism. The controller controls emissions and scanning of the ultraviolet light beam based on a holographic signal so that the ultraviolet light beam can be scanned across the screen.

Abstract: Technologies are generally related to holographic imaging. In some examples, techniques are described for generating a holographic image of an object using a plurality of light sources, a shutter, and an image sensor array. Each of the light sources is configured to generate a light beam using a respective wavelength in a different range. In various examples, an apparatus as described here may be configured to control the shutter to receive the light beams from the plurality of light sources and selectively pass each of the received light beams to provide a selected light beam. The apparatus may further include a beam splitter and a mirror unit configured to generate an object light beam and a reference light beam from the selected light beam. The apparatus may include an image sensor array configured to detect an image of interference caused by the reference light beam and the object light beam.

Abstract: A holographic display apparatus is provided. The holographic display apparatus may include an input optical unit to illuminate coherent parallel light to a spatial light modulator (SLM), the SLM to generate a plurality of hologram-modulated diffraction beams by illuminating the coherent parallel light in a plurality of directions, or to generate hologram-modulated higher-order diffraction beams by illuminating the coherent parallel light in a single direction, and an optical imaging unit to reproduce at least one holographic three-dimensional (3D) image with different viewpoints on a single imaging area, using the generated at least one diffraction beam.

Abstract: Methods and apparatus for imaging a phase or amplitude that characterizes a scattered field emanating from a physical medium. A local probe is stepped to a plurality of successive probe positions and illuminated with an illuminating beam, while a specified phase function is imposed on a reference beam relative to the illuminating beam. A field associated with the scattered field is superimposed with the reference beam and the detection of both yields a detected signal which is recorded as a function of probe position in order to obtain a hologram. The holograph is transformed, filtered, and retransformed to generate an image. Alternatively, the illuminating beam may directly illuminate successive positions of the physical medium.

Abstract: Fast processing of information represented in digital holograms is provided to facilitate converting a complex Fresnel hologram into a single phase-only hologram, which can be called a bidirectional error diffusion (BERD) hologram, for displaying 3-D holographic images representative of a 3-D object scene on a display device. The BERD hologram can be capable of representing a 3-D object scene and preserving favorable visual quality on the reconstructed holographic image. A holographic generator component (HGC) can receive or generate a complex Fresnel hologram representing a 3-D object scene. The HGC can directly apply the BERD process to the complex Fresnel hologram to facilitate converting the complex Fresnel hologram into a phase-only hologram. Alternatively, the HGC can directly apply a unidirectional error diffusion process to the complex Fresnel hologram to facilitate converting the complex Fresnel hologram into a phase-only hologram.

Abstract: An apparatus includes a recording light source configured to emit recording beams, an EASLM configured to time sequentially modulate the recording beams emitted from the recording light source according to hologram information corresponding to a 3-dimensional image spatially divided into a plurality of portions, an OASLM configured to include a plurality of regions corresponding to the plurality of the divided portions of the 3-dimensional image and images on a region corresponding to the portions using the modulated recording beams to form a hologram, a scanning optical unit configured to reproduce the hologram formed by the recording beams serially modulated by the EASLM on a reduced scale and transmit the hologram to the regions of the OASLM corresponding to the portions, and a reproducing light source configured to produce a surface light and emit the surface light to the OASLM.

Abstract: A holographic display including light sources (LS1, LS2, . . . ) in a 2D light source array, lenses (L1, L2, . . . ) in a 2D lens array, a spatial light modulator (SLM) and a beamsplitter, in which there are m light sources per lens, and the light sources are in m-to-one correspondence with the lenses. The beamsplitter splits the rays leaving the SLM into two bundles, one of which illuminates the virtual observer windows for m left eyes and the other illuminates the virtual observer windows for m right eyes. In one example, m=1. An advantage is 2D-encoding with vertical and horizontal focusing and vertical and horizontal motion parallax.

Abstract: A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window.

Abstract: A method for coding at least one holographic pattern recording a light signal representative of light received by a perspective object in a scene. The method includes: determining, from the light signal and for each point xj(1?j?M) of the holographic pattern, a set of N light rays passing through the point and corresponding respectively to N different viewing positions for viewing the pattern; generating from the M sets of N determined light rays, a plurality N of two-dimensional views of the object corresponding respectively to the N viewing positions of the pattern, by causing M determined rays to intersect at each of the viewing positions that are contained in a viewing plane parallel to a plane containing the holographic pattern; arranging the N generated views as a multi-view image of the object, the N views corresponding respectively to sub-images of the multi-view image; and compressing the multi-view image.

Abstract: Provided are a device and a method for feedback based digital holographic content reconstruction verification. The device may include a generator to generate a holographic content by receiving a first parameter value, a reconstructor to reconstruct a hologram from the holographic content, and a feedback based interface to adjust the first parameter value to be a second parameter value by receiving feedback on the hologram.

Abstract: A laser processing apparatus including a laser light source, a phase modulation type spatial light modulator, a driving unit, a control unit, and an imaging optical system. A storage unit that is included in the driving unit stores a plurality of basic holograms corresponding to a plurality of basic processing patterns and a focusing hologram corresponding to a Fresnel lens pattern. The control unit arranges in parallel two or more basic holograms selected from the plurality of basic holograms stored in the storage unit, overlaps the focusing hologram with each of the basic holograms arranged in parallel to form the whole hologram, and presents the formed whole hologram to the spatial light modulator.

Abstract: A method of computing a hologram for reconstructing an object using a display device. The display device enables a holographic reconstruction of the object. The display device includes a light source and an optical system to illuminate a hologram-bearing medium being encodable with the hologram. The method includes the steps of: (a) computing the hologram by determining the wavefronts at an approximate observer eye position that would be generated by a real version of the object to be reconstructed; and (b) encoding the computed hologram in the hologram-bearing medium.

Abstract: A modular routing node includes a single input port and a plurality of output ports. The modular routing node is arranged to produce a plurality of different deflections and uses small adjustments to compensate for wavelength differences and alignment tolerances in an optical system. An optical device is arranged to receive a multiplex of many optical signals at different wavelengths, to separate the optical signals into at least two groups, and to process at least one of the groups adaptively.

Abstract: 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. When said holograms are presented with reference beams of vibrational waveforms having similar characteristics to those which were present during recording of the original objects, phantoms of the original objects or subjects will reconstruct themselves in space with an energy glow of intensity that varies thusly with the degree of similarity between the waveform modulations of the reconstructing wavefronts and those of that same which were used to originally record said objects. Said n-dimensional description space can be sampled of the said glowing phantoms.

Abstract: This invention relates to holographic film for recording multicolor volume holograms, especially full color volume reflection holograms, and to manufacturing techniques for such film, and to corresponding methods of recording multicolor and full-color volume, in particular volume reflection holograms. We describe a holographic film for recording a multicolor volume hologram, the film comprising: a carrier; a first photosensitive recording layer sensitive to one or both of red and green laser light; and a second photosensitive recording layer sensitive to blue laser light. Both the first and second photosensitive recording layers comprise silver halide and have a grain size of less than 30 nm, and at least one of the photosensitive recording layers has a thickness of greater than 3 ?m and less than 5 ?m.

Abstract: A color filter with parallel, vertical color strips of the RGB base colors associated with the image separating element, the color strips repeating horizontally within the color filter in periodic fashion. The light modulator contains a sequence of two registered holograms for each base color interlaced into six pixel columns for a left observer eye and for a right observer eye, and the sequence is repeated horizontally in periodic fashion. The periods of the color filter and the hologram are arranged relative to one another with the same degree of expansion, with a color strip and at least two pixel columns with holograms of the base color of the color strip are associated with a separating element.

Abstract: A method of manufacturing a master for producing a hologram device is provided. The holographic image reconstructs when the photosensitive film of the hologram device is struck by a beam of light from a wide angle being defined relative to a perpendicular line to a surface of the photosensitive film.

Abstract: A holographic structure, system and method project a grey-scale image in a narrow IR spectral band that is related to a broadband thermal signature of an object. The projected grey-scale image, when integrated over the broadband, forms either a decoy that approximates the thermal signature of the object or a mask that obscures the thermal signature of the object. The projected image is a tuned phase recording of a desired far field projection. In different embodiments, the projected image is a “positive” or a “negative” image of the object's thermal signature, a difference image between the thermal signatures of a false object and the object or a camouflage image of random features having approximately the same spatial frequency as the object's thermal signature. The goal being to confuse or fool, even for a short period of time, the warfighting or surveillance system or human observer that uses a broadband IR sensor to acquire and view thermal images of the scene.

Abstract: 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.

Abstract: A Head Up Display can be utilized to find light from an energy source. The Head Up Display includes a first waveguide having a first input coupler and a first output coupler. The Head Up Display can also include a second waveguide having a second input coupler and a second output coupler. The first waveguide has a first major surface and the second waveguide has a second major surface, which are disposed approximately parallel to each other. The first waveguide and the second waveguide are positioned as a combiner and allowing viewing an outside feed and information from an image source. The first input coupler diffracts light in the first field of view into the first waveguide and light in a second field of view reaches the second input coupler and is diffracted into the second waveguide.

Abstract: 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. The backlight unit is manufactured as an organic light emitting diode including a plurality of quantum dots.

Abstract: A method of preparing a hologram where an original image is recorded as interference fringes on a predetermined recording surface by arithmetic operations using a computer, the method including: a step of defining an original image formed as a three-dimensional image, a hologram recording plane for recording the original image, and reference light to be irradiated onto the hologram recording plane, a step of defining a large number of arithmetic operation points on the hologram recording plane and arithmetically determining the intensity of the interference wave formed by an object light beam emitted from each object and the reference light for each of the arithmetic operation points and a step of preparing physical interference fringes on a medium on the basis of the intensity distribution of interference wave obtained on the recording plane in the arithmetically determining step, the front-most part of the three-dimensional image being arranged near the hologram recording plane at the time of defining the o

Abstract: 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. The method comprises determining one or more data key-points of at least one potential object of interest (19) in the received holographic intensity data, and also comparing the determined one or more data key-points to at least one pre-determined propagation space invariant object descriptor associated with an object to determine a match in order to identify or detect the object and determine its location in the propagation space.

Abstract: 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. An image capture assembly is configured to capture an image of the diffracted electromagnetic radiation and produce the hologram of the cross-section of the object from the captured image. The hologram of the cross-section includes information regarding a single cross-section of the object.

Abstract: 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). A gradation pattern, with which appearance probabilities of two record attributes gradually change in space, is overlapped onto the recording surface, and to each unit region, one of either record attributes is assigned according to the appearance probabilities of the respective record attributes at each individual position (S30).

Abstract: A method of displaying a video image comprises receiving sequential image frames at a processor. Each image frame is processed to obtain a kinoform. A programmable diffractive element such as an SLM represents the sequence of kinoforms allowing reproduction of the image using a suitable illumination beam.

Abstract: A numerical method of recording a two or three dimensional object scene in a binary hologram. When the binary hologram is illuminated with a reference beam, the original object scene can be reconstructed and observed by a viewer. As the hologram is binary, i.e. composed of black or white pixels, it can be printed with commodity printers. The process is simple, fast, and economical, hence decreasing the cost and time for hologram design and production. In addition, with binary holograms, the ability to store the holograms is enhanced and binary holograms facilitate efficient transmission of the holograms.

Abstract: A system and a method perform buoyance of a 3D hologram image on a hologram display screen in a projection mode. A system of displaying a digital hologram includes: a composite hologram unit configured to generate a hologram array by receiving hologram data of a fringe pattern and by compositing background image and a foreground image using the received fringe pattern; a hologram projection unit configured to project a hologram image through a wide-angle lens by applying a light to the hologram array; and a hologram display unit configured to perform space buoyance of the hologram image projected by the hologram projection unit on a 3D hologram display screen. The digital hologram content is managed in real time, and transmission of the digital hologram content to a remote place and site adaptive display of hologram image media may be achieved.

Abstract: 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. Accordingly, it is possible to generate a new digital hologram with a different orientation or at a different distance using an angular spectrum of a digital hologram generated in advance, without geometric information of an object. In addition, it is possible to readily and intuitively synthesize a new digital hologram while viewing an image visualized in a 3D space.

Abstract: 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.

Abstract: 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. Accordingly, a natural 3-D image can be played because a 3-D image corresponding to an observer view is reproduced without a process of generating in-between view images and pieces of corresponding depth information when the observer moves.

Abstract: 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. Each SLM is operated concurrently to output a narrow field of view, elemental hologram. The system includes coarse integral optics combining the holographic images into a single hologram (“super hologram”) viewable in a hologram image plane a distance from the course integral optics. The coarse integral optics combine the holographic images by providing angular tiling of the holographic images, e.g., bending the axes of parallel lenses. In this manner, the field of view, in one direction, of the super hologram is based on the number of holographic display devices provided in the array in one direction.

Abstract: 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. The grey-scale holographic structure may comprises a plurality of layers (N) to provide a phase total delay of lambda which results from a series tuned layers, each having a thickness of a wavelength/N. Each layer provides a predetermined amount of phase delay allowing the structure to operate as a phase-delay hologram.

Abstract: Disclosed are a holographic image display device and a method for driving the same which may stabilize luminance of a holographic image and reduce flicker. The holographic image display device includes a laser backlight unit, a surface light converter converting laser light emitted from the laser backlight unit into surface light-type laser light and emitting the surface light-type laser light, a spatial light modulator (SLM) implementing an input holographic interference pattern and projecting a holographic image at a viewing point using the surface light-type laser light, and an optical switching unit located between the laser backlight unit and the SLM and controlling polarization of the laser light. The optical switching unit blocks laser light emitted to the SLM in a blocking mode, and transmits the laser light emitted to the SLM in a transmission mode.

Abstract: In the control of light condensing irradiation of laser light using a spatial light modulator, the number of wavelengths, a value of each wavelength, and incident conditions of the laser light are acquired, the number of light condensing points, and a light condensing position, a wavelength, and a light condensing intensity on each light condensing point are set, and a distortion phase pattern provided in an optical system including the spatial light modulator to the laser light is derived. Then, a modulation pattern presented in the spatial light modulator is designed in consideration of the distortion phase pattern. Further, in the design of a modulation pattern, a design method focusing on an effect by a phase value of one pixel is used, and when evaluating a light condensing state, a propagation function to which a distortion phase pattern is added is used.

Abstract: 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.

Abstract: 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.