A novel system of optical see-through augmented reality (AR) is proposed by making use a holographic element (HOE) with full-color and lens-array functions. The HOE provides property three-dimensional (3D) virtual images, for it functions as conventional lens array only Bragg-matched lights. An recording setup was built, recorded 30 mm×60 mm sized using the techniques spatial multiplexing large-area wavelength imaging. experimental results confirm that suggested can provide 3D images in AR system.

The principles and characteristics of see-through 3D displays are presented. We especially focus on the integral-imaging display system using a holographic optical element (IDHOE), which is able to images satisfy property at same time. technique has advantage high transparency capability displaying autostereoscopic images. have analyzed properties IDHOE for both recording stages. Furthermore, various studies new applications improvements introduced. Thanks volume grating, it possible...

In this review paper, the recent progress of 3D applications using integral imaging is introduced. Thanks to flat panel displays, quality displays has also improved, resulting in opening more display. The previous studies on emphasized improvement viewing system, but emergence new technologies requires than replacement current 2D displays. New method, such as with augmented reality, information capturing, real-time processing, projection-type and floating their research trends, are

Abstract Despite steady technological progress, displays are still subject to inherent limitations in resolution improvement and pixel miniaturization because a series of colours is generally expressed by combination at least three primary colour pixels. Here we propose structure comprising metal cavity nanoaperture, which refer as cavity-aperture, simultaneously control the intensity transmitted light single pixel. The constructs plasmonic standing waves organize spatial distribution...

Two-dimensional (2D) and three-dimensional (3D) transparent screens can be created using lens-array holographic optical elements (HOEs). Lens-array HOEs used to perform 2D 3D imaging for Bragg matched images while maintaining the properties of in background scenes. or on proposed screen is determined by relative size an elemental-lens a pixel projected image. The displays are implemented diffusion light each taking advantage reflection-type integral imaging, respectively. We constructed HOE...

We propose a hogel overlapping method for the holographic printer to enhance lateral resolution of stereograms. The size is directly related stereogram. Our analysis by computer simulation shows that there limit decreasing while printing Instead reducing hogel, stereograms can be enhanced overlapped hogels, which makes it possible take advantage multiplexing property volume hologram. built printer, and recorded two using conventional proposed methods. images movies experimentally captured...

In a typical auto-stereoscopic three-dimensional display, the parallax barrier or lenticular lens is located in front of display device. However, projection-type such optical components make it difficult to elemental images on screen reconstruct image, even though has many advantages. Therefore, necessary use rear projection technique despite fact that this an inefficient space. We propose here frontal by using polarizer and quarter-wave retarding film. Since proposed method uses scheme...

A space bandwidth product (SBP) enhancement method for holographic display using high-order diffraction of a spatial light modulator (SLM) is proposed. Among numerous high order terms, the plus-minus first and zeroth are adopted guided by optical elements (HOEs) to an identical direction with same intensity. By set electro-shutters synchronized corresponding component, system acts as if three SLMs tiled in horizontal direction. To confirm feasibility HOE guiding optics system, several...

We propose a 3D/2D convertible screen using holographic optical element and angular multiplexing method of volume hologram. The proposed screen, named multiplexed (MHOES), is composed passive components, displaying modes between 3D 2D are converted according to projection directions. In recording process, the by two reference waves with different incidence angles enables functions screens be recorded in single material. Also, order avoid bulky experimental setup due adopting projectors for...

We compare the resolution of hologram reconstruction synthesis methods based on integral imaging using rectangular and hexagonal lens arrays. By a array instead conventional array, three-dimensional objects are sampled with grids. Due to more efficient sampling grid, reconstructed object is higher compared case array. analyze enhancement quantitatively verify it experimentally.

A dual-view display system provides two different images in directions. Most of them only present two-dimensional for observers. In this paper, we propose a projection-type three-dimensional (3D) based on integral imaging. To assign directivities to the images, and screen with lenticular lenses are implemented. The split collimated image from projection device into separated integrated by single lens array front screen, full-parallax 3D observed viewing regions. visibility reconstructed can...

We report on the development of a high-resolution see-through integral imaging system with resolution and fill factor-enhanced lens-array holographic optical element (HOE). propose procedure for fabricating lens pitch controllable HOE. By controlling recording plane performing repetitive recordings process, HOE could be substantially reduced, high factor same numerical aperture compared to reference lens-array. demonstrated feasibility by 500 micrometer pitch. Since pixel projected image can...

Holographic-optical-element (HOE)-based integral imaging display can be applied to augmented reality. However, a narrow viewing angle is bottleneck for commercialization. Here, we propose method enhance the of using Bragg mismatched reconstruction HOEs. The enlarged with two probe waves, which form different zones. effect analyzed simulation and experiment. In order show feasibility proposed method, experiment demonstrated.

In three-dimensional television (3D TV) broadcasting, we find the effect of fundamental depth resolution and cardboard to perceived on multi-view display is important. The observer distance specification quantize expressible range, which affect perception observer. addition, 3D TV needs view synthesis process using image-based rendering induces from relation among stereo pickup, display. this paper, analyze in broadcasting. After analysis, numerical comparison subjective tests with 20...

We propose an optical pseudoscopic to orthoscopic conversion method for integral imaging using a lens-array holographic element (LAHOE), which solves the problem. The LAHOE reconstructs array of diverging spherical waves when probe wave with phase-conjugated condition is imposed on it, while converging reconstructed in ordinary reconstruction. For given elemental images, integrates three-dimensional images without distortion. principle proposed verified by experiments displaying computer...

In this paper, we develop a real-time depth controllable integral imaging system. With high-frame-rate camera and focus lens, light fields from various ranges can be captured. According to the image plane of field camera, objects in virtual real space are recorded simultaneously. The captured information is converted elemental time without pseudoscopic problems. addition, derive characteristics limitations as 3D broadcasting capturing device with precise geometry optics. further analysis,...

A reflection-type integral imaging (InIm) system using a diffuser holographic optical element (DHOE) is proposed for improving the fill factor of displayed three-dimensional images. The DHOE performs an function similar to that conventional only Bragg matched light, while mismatched light passes through DHOE. Elemental images projected under matching condition are scattered by Meanwhile, reflected concave mirror-array becomes and integrated into without problem. characteristics examined...

Graphics processing unit (GPU) based fast calculation method for computer generated spherical hologram (CGSH) of a real-existing object is proposed.Three-dimensional (3D) point cloud constructed by capturing from multiple directions using depth camera.The GPU used in both generation part and numerical reconstruction the CGSH.The improved efficiency verified comparing computation speed between central (CPU) implementation.

We propose a pre-compensated recording process of holographic optical element (HOE) lenses, where both reference and signal waves have spherical wavefronts, for solving wavelength mismatch problem between the displaying process. Based on localized approximation aperiodic volume gratings, shrinkage effects are by optimizing setup HOE so that Bragg condition each local grating is satisfied. In order to realize practical implementations setup, complicated wavefronts be required compensation...

The representation of three-dimensional volumetric pixels, voxels, is an important issue for the near-to-eye displays (NEDs) to solve vergence-accommodation conflict problem. Although holographic waveguides using optical element (HOE) couplers are promising technologies NEDs with ultra-thin structure and high transparency, most them have presented only a single fixed depth plane. In this paper, we analyze imaging characteristics waveguides, particularly represent arbitrary voxels investigate...

We introduce a phase-only hologram generation method based on an integral imaging, and propose enhancement in representable depth interval.The computational imaging reconstruction is modified optical flow to obtain depth-slice images for the focused objects only.A phaseonly multiple plane generated using iterative Fresnel transform algorithm.In addition, division proposed minimum interval.

We analyze an image quality of a holographic lens (HL) in order to implement compact near-eye displays using flat-panel-type micro-display panel. The proposed method utilizes non-converging signal wave fabrication process the HL, so that it provides affordable eye-box size with minimizing aberration due rays off-Bragg condition. For analyzing and optimizing HL based on wave, we introduce comprehensive analysis model for assessment HL. model, inspired from conventional design strategy...

We propose a subpixel scale elemental image generation method to correct the errors created by finite display pixel size in integral imaging. In this paper, two are mainly discussed: pickup-and-display mismatch error and between pitch lens pitch. The proposed considers relative positions lenses pixels scale. Our pickup calculates position parameters, generates an with completely inside lens, border using weighted sum method. Appropriate experiments presented verify validity of

The purpose of this study was to describe the clinical presentation and features in electrodiagnostic imaging investigations young South Korean males diagnosed with Hirayama disease (HD).

A major advantage of wavefront reconstruction based on a series diffracted intensity images using only single-beam illumination is the simplicity setup. Here we propose fast-converging algorithm for calculation illumination. The captured are resampled to images, ranging from highest lowest resampling; each image has half number pixels as previous one. Phase at lower resolution used initial solution phase higher resolution. This corresponds separately calculating lower- and higher-frequency...