Results 191 to 200 of about 1,217,682 (246)

Computational Reconstruction of Images from Holograms

Applied Optics, 2002
The equations to reconstruct an image plane from a hologram are developed. This development is carried out for planes parallel to the hologram, which allows fast computation through the use of fast Fourier transforms. Algorithms for a digital computer are developed so images can be reconstructed, both with and without the Fresnel approximation, from a ...
Jerome H, Milgram, Weichang, Li
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Iterative reconstruction of in-line electron holograms

Micron, 2005
In low energy electron point source (LEEPS) microscopy, electrons emerge from a point source, propagate as spherical waves, and arrive at a screen. Some electrons scatter off an object, i.e. a cluster of atoms, placed between the source and the screen; others arrive at the screen without scattering.
Jose F, Arocena, Timothy A, Rothwell, Mark R A, Shegelski   +2 more
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Scanline rendering of digital HPO holograms and hologram numerical reconstruction

Proceedings of the 22nd Spring Conference on Computer Graphics, 2006
This paper presents a fast and complete rendering method that can be used for creating digital horizontal parallax only (HPO) holograms of a scene consisting of triangle mesh objects. This method solves visibility and occlusion problems and is capable of working with triangles as the basic primitive instead of the usually used points.
Martin Janda, Ivo Hanák, Václav Skala
openaire   +1 more source

Reflection hologram for reconstructing deep images

Optics Letters, 1997
A method to record deep and blurless images as a reflection hologram is proposed. A slit was used in the recording process in the same manner as for a rainbow hologram. The reconstructed image was monocolor and could be observed from wide longitudinal angles when it was illuminated by an extended white-light source such as a fluorescent lamp.
Y, Taketomi, T, Kubota
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Generative adversarial neural network for 3D-hologram reconstruction

Laser Physics Letters
Neural-network-based reconstruction of digital holograms can improve the speed and the quality of micro- and macro-object images, as well as reduce the noise and suppress the twin image and the zero-order.
S. A. Kiriy, D. Rymov, A. S. Svistunov, A. Shifrina, R. Starikov, P. Cheremkhin   +5 more
semanticscholar   +1 more source

Microwave Holograms and Optical Reconstruction

Applied Optics, 1967
Experiments on the construction of holograms using microwaves and the optical reconstruction of images were conducted. The microwave fields were detected by a diode which mechanically scans the field distribution. The electrical signals from the detector were amplified and converted to light signals which were recorded on photographic films by a camera
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Electronic reconstruction of acoustic holograms

IEEE Transactions on Audio and Electroacoustics, 1970
A method is described for reconstructing acoustic hologram images using an electronic means which avoids multiple image formation. When the dimensions of the hologram are small compared to the dimensions of the viewing area, the incident waves are approximately plane rather than spherical.
openaire   +3 more sources

Investigating learning-empowered hologram generation for holographic displays with ill-tuned hardware.

Optics Letters, 2023
Existing computational holographic displays often suffer from limited reconstruction image quality mainly due to ill-conditioned optics hardware and hologram generation software.
Xinxing Xia, Furong Yang, Weisen Wang, Xinghua Shui, F. Guan, Huadong Zheng, Yingjie Yu, Yifan Peng   +7 more
semanticscholar   +1 more source

Reconstruction characteristics of polarization holograms

2012 11th Euro-American Workshop on Information Optics, 2012
The characteristics of the reconstruction of polarization holography are investigated in order to analyze the fundamental performance of polarization holographic memory system. It is found that, in general, the polarization state of the reconstructed signal is different from that of the recorded signal.
Kazuo Kuroda, Yusuke Matsuhashi, Tsutomu Shimura   +2 more
openaire   +1 more source

Diffractive Networks All-Optically Reconstruct Holograms

Conference on Lasers and Electro-Optics, 2022
We present a new framework for computer-free, all-optical reconstruction of inline holograms through a passive diffractive network that is trained with holographic image data using deep learning.
Md Sadman Sakib Rahman, Aydogan Ozcan
openaire   +1 more source