A rapid algorithm for the computation of multi-view multi-layered holograms is developed based on Fourier-Fresnel calculations on layered sections of a 3D object rendered as color images and depth maps from several views. The collection of these multi-layered holograms are then angularly tiled to provide wide field of view 3D images with accommodation, occlusion and view-dependent shading 3D cues.

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In this paper, a design of holographic optical shuttle is proposed. A 3-port device was fabricated with insertion and return losses of about 1.9 and 33 dB, respectively. The isolation can be higher than 39 dB.

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In this presentation, a high resolution integral image microscope system with LC devices was proposed. With a LC plane plate or a LC wedge placed in the light field system, the resolution of integral image microscope can be improved by combining images with displacement.

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In this work, we present an angular- and polarization- multiplexing system based on spatial light modulator to replace mechanism scanning in beam-rotation method. The primarily experimental results of resolution enhancement in synthetic aperture digital holographic microscopy are demonstrated.

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The volume holographic imaging system (VHIS) has the capability to obtain not only the image coming from the surface of the thick sample but also the images beneath the surface of the sample. The scattering light causing from the turbid media when the thickness of the turbid media is gradually increased affects the contrast and resolution in VHIS. We explore the maximum imaging depth in VHIS as the turbid media is presented in the system based on the resolution and contrast of the images from the simulations and experiments. Utilizing the Monte Carlo ray tracing and K-sphere method in the commercial software package, the turbid media and VHIS are modeled in the software. The images from the VHIS experiment show the consistency with images in the simulation considering the resolution

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This paper develops a calibration system. Because the collimating lens is not required to scan, this system can rapidly perform light beam collimation testing and calibration.

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It is difficult to implement optical scanning holography in the coherent mode for the scattered object because the light scattered from the object is extremely weak. In the paper we successfully acquired such coherent-mode scanning holograms.

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We presented a method to improve the image quality of the diffractive phase-shift patterns (PSPs) which were generated by diffractive optical elements implemented by a spatial light modulator. By temporally integrating a sequence of diffraction patterns degraded with speckles, the speckles were suppressed and the destructive line became clearly observed.

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This work demonstrates a resolution enhancement method for synthetic aperture digital holography based on spectrum normalization technique. Experimental results indicate that the spatial resolution and signal-to-noise ratio of the synthesized reconstructed image are improved simultaneously under low numbers of the acquired holograms.

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In2Se3 crystals show black shiny for a-phase and red to yellow for the r-phase. The a-In2Se3 achieves wide-energy-range photoelectric conversion owing to the existence of surface oxide (oxygen detection). The a←→r inter-phase transition promote feasible applications of r-In2Se3 suitable for optical-memorial sensing and memory devices.

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We present a method to design programmable Fresnel lenslet array (PFLA) which is used as the input to an liquid-crystal-on-silicon spatial light modulator (LCoS-SLM) for projecting 2D/3D light-spot images. The system can be adopted for the applications such as 3D imaging and head-up displays.

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We present a method to create a Kinoform CGH which is made from the 3D computer graphic models composed of 2D polygons. The analytical approach is used to avoid complicated FFT computation for reducing time consuming. In addition, the optical reconstruction of the synthesized CGH is demonstrated.

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In this paper, we proposed a novel recording method of polarization-selective volume holograms with a large diffraction angle. The hologram is sandwiched between two 45°-90°-45° prisms and can easily record the interference fringes in the recording material with only one beam.

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A 3D translation stage which meets the requirement of the next-generation lithography is proposed. With the help of Michelson interferometer, accuracy of the presented setup better than 1 nanometer is achievable.

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Extended depth of field (EDoF) can expand the acquisition volume of an image system. However, the performance of EDoF was constrained by the imperfect of the input image. In this study, we proposed an algorithm to lower the flaws caused during the EDoF acquisition process by computational scheme.

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This research uses the minimum average correlation energy method and shifted training images to recognize the polychromatic images based on Mach-Zehnder joint transform correlator. It leads to that the correlation output peak is much sharper and the input is proper to the liquid crystal device of input plane. In our former research, the training images are displayed at the center position. However, the total sidelobe energy may not be the minimum. In order to solve the problem, we transform the color image into three HSL color space components. Then, three components are rotated from 0° to 360° in steps of 5° and shifted from -5 to 5 pixels in both of vertical and the horizontal directions to yield training images. The system can deal with rotated images.

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We transform a color image into three YIQ color space components. Via the utilization of Mach-Zehnder joint transform correlator, the minimum average correlation energy method, shifted training images, and computation, we will obtain the reference functions of the minimum sidelobe energy and record the relevant data.

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In this study, we developed a novel temperature sensor with holographic plate and integrated the sensor into a precision heterodyne interferometer. Based on measurement results, the resolution of proposed method can be reached 0.2 C.

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In this paper, we present the theoretical analyses of volume polarization holographic recording in a thick photo-induced birefringent material by using vector coupled wave equations. The polarization characteristics of diffracted light are discussed. These results are very useful for further optical information applications using a volume polarization hologram.

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Phase optics provides powerful insights to investigate the coherent behavior of optical systems. In this study, we used a lenslet array to capture the phase-space information. With adjustment of coherence of a light source and Gaussian-Schell regression, we successfully model the Wigner distribution function of a partial coherent light source.

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This paper is to design the phase-only binary diffractive optical element that can diffract a finer speckle patterns for the application of stereoscopic measuring systems. The iterative Fourier transform algorithm (IFTA) was adopted to calculate the elements. After fabricating the elements, the experimental result shows that the speckle density could be well improved.

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We present an interactive augmented reality system that combines a real-time computer generated hologram (CGH) and a motion sensor device. The CGH is produced by a point cloud algorithm, and the motion sensing is achieved by a finger sensor Leap.

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Modified Gerchberg-Saxton Algorithm is used for compiling the RGB Computer Generated Holography in this study, and the RGB reconstructed image is modulated the white-light image through X-Cube to implement the full-color MGSA-type CGH projection system.

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Two approaches using the azobenzene-based composites to fabricate re-writable materials for optical storage is described. Diffraction efficiency of the materials is studied as well.

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The development of diffractive optical element (DOE) which generates gradient axial beam (GAB) along the optical axis is carried out. The dsired DOE is designed by using the numerical algorithm of conjugated gradient method. In order to evaluate its optical performance, the illuminance distribution of GAB along the optical axis is calculated and analyzed. The analyses reveal that the quantization effect of DOE obviously casuses the fluctuation in the axial distribution of AGB.

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Differ from conventional optical compressed sensing (CS) technique based on Fourier transform requires lenses, this study presents optical lensless scheme to achieve CS in the Fresnel domain. High-resolution image reconstruction based on compressed sensing technique with a low-resolution CCD camera from a few exposure of optical random phase encoding mask is also demonstrated.

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In this study, we developed a multispectral imaging system based on a fully computational scheme: weighted principal component analysis (wPCA). We examine the algorithm to reconstruct the spectral reflectance of a full-color picture with LED illumination. Spectral error in average (0.22 rms) across the visible wavelength validates the procedure successfully.

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Materials such as teeth, milk or human tissue are opaque. We have shown that coherent light can be focused through them and the principle can be applied in therapy. The two different optimization algorithms are programmed. To approach the actual situation, we add a noise to the algorithms.

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In this paper, we build a bidirectional scattering distribution function measuring device to detect the scattering distribution. It benefits the analysis of recording medium in the holographic storage system.

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A scanning approach using fringe projection techniques to perform the 3D shape measurement for a complicated object is proposed. Shadowing caused by tilted fringe projection can be eliminated as well. Even though the depth discontinuity on the inspected surface is pretty high, the proposed method can retrieve the 3D shape precisely.

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In this letter we present an advanced volume holographic microscope whose depth resolution is improved by using light-sheet side illumination. In our system, the fluorescent signals only originate from the focal section which is excited by light-sheet illuminated. The out-of-focus signal is massively suppressed, so the depth resolution is hugely enhanced.

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Real-image generation of disk-type multiplex hologram for 360-degree viewing is introduced in this study. With diverging object wave in the hologram-forming process, relatively larger reconstructed images can be obtained from this type of multiplex hologram.

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In this study, real-image and virtual-image generation in 360-degree viewable disk-type multiplex holograms are described. Optical setup of holographic replication for virtual-image display using real-image master hologram is also introduced.

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A near infrared organic-inorganic hybrid device based on photorefractive Rh-doped Bi12TiO20 (BTO) substrate and liquid crystal (LC) cell is proposed. The device works as spatial light modulator and it’s electrical and optical modulation characteristics are measured and discussed.

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Abstract—In this study, we propose to use phase-sensitive optical coherence tomography (PS-OCT) for inspection of solar cells. However, suffering from intrinsic phase noise in OCT system, we develop an approach to reduce phase noise. By extracting the amplitude and phase signals from OCT interference signals, the three-dimensional structure of solar cell can be obtained as well as the nanostructures on arbitrary planes of solar cell simultaneously. The conventional OCT results show that different layer structures can be obtained and quantitatively evaluated. In contrast, from the phase signal, the inverted pyramid structure can be visualized, which is widely used for reduction of interface reflection. Finally, based on the proposed configuration, a parameter of surface reflection coefficient is defined to evaluate the interface reflection from the surface of solar cell. Results show that OCT can be a potential tool for providing nondestructive inspection of micro/nanostructures on solar cell at a depth range of 3 mm.

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A scanning approach using fringe projection techniques to perform the 3D profile measurement for a non-diffusive object is proposed. It employs a hologram as the fringe projection device. Even though the inspected object is non-diffusive, the proposed method can retrieve the 3D shape precisely. Surfaces with depth discontinuities can be retrieved very well.

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The BCP photonic reflectors with various microstructures can be fabricated from the self-assembly of the PS-P2VP BCP thin films. The significantly different optical properties associated with the microstructural shapes are promising to be applied in various applications.

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The paper presents the results of the comparison of the following digital off-axis hologram reconstruction algorithms accuracy: spatial filtering in Fourier plane and complex wave retrieval method. Based on the experimentally recorded digital hologram of the calibrated step, a study of the quality of these DH techniques methods was performed.

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In this paper, we propose an optical model of reflection grating of collinear holographic storage system. Both the point spread function and the wavelength selectivity are analyzed based on the proposed optical model.

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Optical aberrations including Seidel aberrations and higher order terms degrade the performance of holographic data storage system, such as bit-error-rate(BER) and storage capacity(SC). Seidel aberrations are the most effective factors for image quality. Optimization on holographic data storage system will be developed and simulated by reducing Seidel aberrations.

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A near infrared sensitive hybrid device, composed with Ru–doped BSO photorefractive crystal and polymer dispersed liquid crystal (PDLC) layer is reported as a light valve. The proposed structure can be operated only by light, thus provides the possibility for real-time image processing at the near infrared spectral range.

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The optically sectioned image can provide detailed interpretation for fine structure of volumetric sample. However, the existing optical sectioned systems need the multi-dimensional scanning for volumetric object. We propose a speckle-based volume holographic microscopy to generate non-scanning, multi-plane images with good optical sectioning, verified with 25 μm beads experiments.

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This study is to investigate the effect of pupil size on wavefront aberrations in progressive addition lenses (PALs) by using a Hartmann-Shack wavefront sensing technique. The results show that only the higher-order aberrations (HOAs) of PALs are influenced by the pupil size, which increase with increasing pupil size and also match the theoretical calculation.

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Optical storage materials based on a photopolymerizable silica and an ethylene glycol phenyl ether acrylate (EGPEA) were prepared by sol-gel process Diffracrion efficiency and selectivity of this holographic material is described as well.

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We demonstrated three-dimensional position measurements of a 60 nm gold nanoparticle held in optical tweezers in water. The position measurements were performed with an in-line, low-coherence digital holographic microscope with the twilight-field technique.

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Reproduction of sound wave is demonstrated by digital holography. By using a high-speed image sensor with 10,000 frames per second, the sound wave with maximum frequency of 5,000 Hz can be recorded and reproduced from time-series of phase data of numerically reconstructed optical wave.

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Single-shot multiwavelength digital holographic technique using a monochromatic image sensor and a single reference beam is presented. Object waves with multiple wavelengths are multiplexed in the space domain and are separately extracted in the spatial frequency domain. The spatial-frequency difference of interference fringes generated by the wavelengths enables the separation.

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Digital holographic microscopy is allowed for imaging the sample with a reconstructed quantitative wavefronts and giving for the analysis of refractive index. The experiments of digital holographic microscopy is presented and progressed to the tomographic imaging for measuring the three-dimensional refractive index inside the sample.

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In this work, we propose a 3-dimensional (3D) real object projector collocated with Lenticular Lens Array (LLA) screen to attain in-situ encoding and decoding of 3D images, achieving auto-stereoscopic display. This design can instantly present 3D stereo and dispense the complicated traditional 3D lenticular printing processes.

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Temporal-spatial demodulation technique (TSDT) for demodulating the signal directly acquired in optical scanning holography(OSH) is studied. We demonstrated that TSDT is a low-cost and efficient demodulation solution for OSH.

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An approach using PMMA and EGPEA to fabricate photopolymerizable materials is presented. Diffraction efficiency of this material is studied as well.

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A concept of 90 degree light bending by holography for solar concentrator is presented. For achieving higher diffraction efficiency, the optical properties of the phenanthrenequinone-doped poly(methyl methacrylate) photopolymer (PQ/PMMA) are present and discuss. The optical experimental results demonstrate that the diffracted beam can bending 90 degree with respect to the input beam.

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A spectrum-division technique using stacked volume holograms is proposed for high angular tolerance. . According to the coupled-wave theory, the diffraction efficiency of such a stacked system is derived. The simulated results show that an angular tolerance of -7° ~ +4° has been achieved with the maximal diffraction efficiency of 95%.

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In this paper, we describe two techniques to improve the performance in the collinear holographic data storage system. The piston light value technique is added in the storage system, so that the phase information is converted into the intensity information, and the traditional binary encoding could be converted into the three-level encoding technique. The homodyne detection technique is added in the storage system, so that the multiplying relationship between the intensity of the diffraction pattern and noise is converted into the adding relationship. Therefore, the quality of the diffraction pattern could be enhanced.

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Iris recognition has proven its accuracy and gained importance in biometric recognition. However, the presence of contact lens, particularly the cosmetic lens, has been proved to deteriorate the iris pattern and the accuracy of recognition. In this study, we propose a blind source separation method by multi-spectral imaging to separate the pattern of iris and cosmetic lens.

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The optical coherence not only represents the statistical behaviors of the light but also plays an important role in the realm of phase-space optics. In this work, we present the fundamental knowledge of the coherence and simulate two kinds of mutual intensity functions to analyze this property.

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