This work presents color holographic display, which is based on a single phase only spatial light modulator (SLM). In the display entire area of SLM illuminated by an on-axis white beam generated large LED. The fully utilizes bandwidth and has capability full-color, full frame rate imaging outstanding quality. achieved through: (i) optimal use source coherence volume, (ii) application LED source, (iii) development novel concept multiplexing technique with filter mask in Fourier plane SLM,...

This paper presents an extended viewing angle holographic display for reconstruction of real world objects in which the capture and systems are decoupled. is achieved by employing multiple tilted spatial light modulators (SLMs) arranged a circular configuration. In order to prove proper visual perception images Wigner distribution function employed. We describe both system using single static camera with rotating object utilizing six SLMs. The experimental results based on computer generated...

The phase information of a complex field is routinely obtained using coherent measurement techniques as, e.g., interferometry or holography. result subject to 2π ambiguity and often referred as wrapped phase. Phase-unwrapping algorithms (PUAs) are commonly employed remove this and, hence, obtain the absolute However, implementing PUAs can be computationally intensive, accuracy those may low. Recently, transport intensity equation (TIE) has been proposed simple practical alternative for...

This paper presents a wide angle holographic display system with extended viewing in both horizontal and vertical directions. The is constructed from six spatial light modulators (SLM) arranged on circle an additional SLM used for spatiotemporal multiplexing extension two perpendicular SLM, that synchronized the SLMs placed image space. method increases effective space bandwidth product of data 12.4 to 50 megapixels. software solution based three Nvidia graphic cards developed implemented...

The angular spectrum (AS) method is a popular solution to the Helmholtz Equation without use of approximations. In this work, new criteria on sampling requirements are derived using Wigner distribution (WD). It shown that for case high numerical aperture conventional AS requires very large amount zero-padding, making it impractical due memory and computational effort. This work proposes modified algorithm evaluates only non-zero components field. results obtained from WD combined with enable...

The paper presents two novel, space-domain reconstruction algorithms for holographic tomography utilizing scanning of illumination and a fixed detector that is highly suitable imaging living biomedical specimens. first proposed algorithm an adaptation the filtered backpropagation to tomography. Its implementation enables avoiding error-prone interpolation in Fourier domain, which significant problem state-of-the-art tomographic algorithm. second modified version former, ensures spatially...

In the paper optical diffraction tomographic system for reconstruction of internal refractive index distribution in fiber utilizing grating Mach-Zehnder interferometer configuration is explored. The setup applies afocal imaging. Conventional application gives, however, highly aberrated object beam producing incorrect refractive-index reconstructions. inherent aberrations are characterized, its influence on both image projections and reconstructions presented. To remove enable a novel digital...

Rigorous propagation methods enable diffraction calculations at high NA. However, for the case of large distances and full NA a signal, common solutions require zero padding or upsampling. This Letter overcomes these problems by introducing sampling scheme based on compact space bandwidth product representation, which adjusts frequency input propagated field according to evolution generalized product. concept allows proposing novel AS method enabling efficiency, accuracy, high-NA...

This paper presents the full technology chain supporting wide angle digital holographic television from capture of real world objects/scenes to display with an extended viewing angle. The data are captured multiple CCD cameras located around object. system is based on tilted spatial light modulators (SLMs) arranged in a circular configuration. capture-display linked by processing module, which allows for significant decoupling and systems. presented experimental results, reconstruction...

We propose a novel tomographic measurement approach that enables noise suppressed characterization of microstructures. The idea this work is based on finding coherent in the input phase data generates an artificial circular structure whose magnitude highest at centre reconstruction. This method decreases level by applying unconventional configuration with object deliberately shifted respect to rotation axis. spatial separation between reconstructed sample and area largest refractive index...

Computer generated holography (CGH) algorithms come in many forms, with different trade-offs terms of visual quality and calculation speed. However, no CGH algorithm to date can accurately account for all 3D cues simultaneously, such as occlusion, shadows, continuous parallax, precise focal cues, without view discretization. The aim is create photorealistic content, not only display purposes but also reference data comparing testing compression algorithms. We propose a novel combining the...

Structured illumination microscopy (SIM) has been widely used in biological research due to its merits of fast imaging speed, minimal invasiveness, super-resolution, and optical sectioning capability. However, the conventional SIM that uses a spatial light modulator (SLM) for fringe projection often limited field view. Herein, we report large-field technique combines 2D grating pattern an SLM selecting orientation performing phase shifting digitally. The proposed breaks bottleneck number by...

Small eyebox in wide-angle holographic near-eye display is a severe limitation for 3D visual immersion of the device. In this paper, an opto-numerical solution extending size these types devices presented. The hardware part our expands by inserting grating frequency fg within non-pupil forming configuration. multiplies eyebox, increasing possible eye motion. numerical algorithm that enables proper coding information projecting correct object reconstruction at arbitrary position extended...

The application of digital holography as a viable solution to 3D capture and display technology is examined. A review the current state field presented in which some major challenges involved holographic are highlighted. These include (i) removal DC conjugate image terms, features recording process, (ii) reduction speckle noise, characteristic coherent imaging (iii) increasing angular range perspective holograms (iv) replaying captured and/or processed using spatial light modulators. Each...

In this paper, we analyze a holographic display system utilizing phase-only spatial light modulator (SLM) based on liquid crystal silicon (LCoS). An LCoS SLM works in reflection, and, some applications, it is convenient to use with an inclined illumination. Even highly illumination, the capable of good-quality image generation. We show that key obtain high-quality reconstructions tilt-dependent calibration and algorithms. Typically, illuminated plane wave normal vector. which requires...

Phase retrieval based on the Transport of Intensity Equation (TIE) has shown to be a powerful tool obtain phase complex fields. Recently, it been proven that performance TIE techniques can improved when using unequally spaced measurement planes. In this paper, an algorithm is presented recovers accurately objects from set intensity measurements obtained at unequal plane separations. This technique employs multiple band-pass filters in frequency domain axial derivative and uses these specific...

This paper presents a novel method of multi-spatial light modulator (SLM) holographic image display that enables wide angle reconstruction images real world objects. The data are delivered by means digital holography. capture and systems arranged in circular configuration. In order to support the proper information flow between multi-sensor multi-SLM we perform analysis using Wigner distribution function. We also consider mismatch configurations as well visual perception displayed image....

A new holographic data processing path for accurate quantitative tomographic reconstruction of 3D samples placed in a cylindrical capillary is proposed. The method considers strong unintentional focusing effects induced by the inner boundary vessel: 1) introduction wave illumination sample, and 2) object deformation. first issue addressed developing an arbitrary algorithm based on filtered backpropagation, while second novel correction utilizing optical rays analysis. Moreover, includes...

Holographic displays employing digital micromirror devices (DMDs) reconstruct 3D images at high diffraction orders. For LED displays, this geometry introduces large dispersion the DMD surface, reducing image resolution and depth. This work proposes a color holographic display with compensation utilizing an additional grating in illumination module. The solution allows to obtain depth up 100 mm, which is comparable one achieved by liquid crystal spatial light modulator, where limiting factor...

Measuring the impact of compression on reconstruction quality holograms remains a challenge. A public subjectively-annotated holographic data set that allows for testing performance techniques and metrics is presented, in addition to subjective visual assessment methodology. Moreover, procedures compared holographic, regular 2D light field displays. For these experiments, double-stimulus, multi-perspective, multi-depth methodology was designed implemented. Analysis scores indicated absence...

In the paper Wigner Distribution (WD) representation analysis of holographic display is presented. The reconstructs image by means Spatial Light Modulator. Two major aspects are covered: imaging and viewing. Optically reconstructed images characterized low spatially variant resolution. Utilizing WD we present a simple formula for resolution as function both coordinates: transverse longitudinal. an aliasing effect allows meaningful extension field view. All theoretical results proven...

A previous Letter by Pedrini et al. [Opt. Lett. 30, 833 (2005)] proposed an iterative single-beam wavefront reconstruction algorithm that uses a sequence of interferograms recorded at different planes. In this Letter, the use relaxation and multiresolution strategies is investigated in terms accuracy computational effort. It shown convergence rate conventional can be significantly improved with techniques combined hierarchy downsampled intensities are used within preconditioner. These prove...

Optical Diffraction Tomography is a technique for retrieving 3-dimensional refractive index distribution from phase objects without destroying the structure of samples. In article we discuss selection and implementation full limited angle version tomographic reconstruction processes together with analysis different methods gathering projections. We present two efficient implementations systems including total processing paths providing examplary results 3-D determination measurements biological

We present a study on spatial changes in the accuracy of tomographic reconstructions obtained with two most popular reconstruction algorithms for diffraction tomography—filtered backprojection (FBPJ) and Rytov-based filtered backpropagation (FBPP). find out that not only FBPJ but also FBPP suffers from significant loss off-axis regions this effect is stronger objects high refractive index contrast. Moreover, we propose some modifications to which allow improvement performance algorithm. In...