31 research outputs found
3D Depth
Optical holographic reconstruction of real 3D scene. Visualization of the large reconstructed depth
High quality 3D object
Optical holographic reconstruction of real 3D scene. High quality reconstruction of rotated object
Providing a Visual Understanding of Holography Through Phase Space Representations
Digital holograms are a prime example for signals, which are best understood in phase space—the joint space of spatial coordinates and spatial frequencies. Many characteristics, as well as optical operations can be visualized therein with so called phase space representations (PSRs). However, literature relies often only on symbolic PSRs or on, in practice, visually insufficient PSRs like the Wigner–Ville representation. In this tutorial-style paper, we will showcase the S-method, which is both a PSR that can be calculated directly from any given signal, and that allows for a clear visual interpretation. We will highlight the power of space-frequency analysis in digital holography, explain why this specific PSR is recommended, discuss a broad range of basic operations, and briefly overview several interesting practical questions in digital holography
Visualization 2: Color holographic display with white light LED source and single phase only SLM
Walking Dog object Originally published in Optics Express on 08 February 2016 (oe-24-3-2189
Visual perception of Fourier rainbow holographic display
The rainbow hologram provides views of reconstruction with rainbow color within a large viewing zone. In our recent paper, a Fourier rainbow holographic display using diffraction grating and a white‐light LED source was introduced. In this technique, the rainbow effect is realized by the dispersion of white‐light source on diffraction grating, while the slit is implemented numerically by reducing the demands of the space‐bandwidth product of the display. This paper presents a novel analysis on the visual perception of the Fourier rainbow holographic display using Wigner distribution. The view‐dependent appearance of the image, including multispectral field of view and viewing zone, is investigated considering the observer and the display parameters. The resolution of the holographic view is also investigated. For this, a new quantitative assessment for image blur is introduced using Wigner distribution analysis. The analysis is supported with numerical simulations and experimentally captured optical reconstructions for the holograms of the computer model and real object generated with different slit size, reconstruction distance, and different observation conditions
Visualization 1: Color holographic display with white light LED source and single phase only SLM
Rotating Dog object Originally published in Optics Express on 08 February 2016 (oe-24-3-2189