Results 21 to 30 of about 11,710 (245)

Practical algorithms for simulation and reconstruction of digital in-line holograms [PDF]

, 2015
Here we present practical methods for simulation and reconstruction of in-line digital holograms recorded with plane and spherical waves. The algorithms described here are applicable to holographic imaging of an object exhibiting absorption as well as ...
Fink, Hans-Werner, Latychevskaia, Tatiana   +1 more
core   +1 more source

Sub-Terahertz Computer Generated Hologram with Two Image Planes

Applied Sciences, 2019
An advanced optical structure such as a synthetic hologram (also called a computer-generated hologram) is designed for sub-terahertz radiation. The detailed design process is carried out using the ping-pong method, which is based on the modified ...
Mateusz Surma, Izabela Ducin, Przemyslaw Zagrajek, Agnieszka Siemion   +3 more
doaj   +1 more source

SEARCH AUTOMATION OF BINARIZATION OPTIMUM LEVEL FOR SYNTHESIZED HOLOGRAMS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2017
The paper considers the features of synthesized holograms suitable for practical use. It is established that binary holograms are the first of all suitable ones for successful application in practice.
Oleg V. Nikanorov, Denis S. Smorodinov
doaj   +1 more source

Enhancement of Imaging Quality of Interferenceless Coded Aperture Correlation Holography Based on Physics-Informed Deep Learning

Photonics, 2022
Interferenceless coded aperture correlation holography (I-COACH) was recently introduced for recording incoherent holograms without two-wave interference.
Rui Xiong, Xiangchao Zhang, Xinyang Ma, Lili Qi, Leheng Li, Xiangqian Jiang   +5 more
doaj   +1 more source

When holography meets coherent diffraction imaging [PDF]

, 2012
Modern imaging techniques at the molecular scale rely on utilizing novel coherent light sources like X-ray free electron lasers for the ultimate goal of visualizing such objects as individual biomolecules rather than crystals. Here, unlike in the case of
Barakat, Bates, Bates, Bates, Bates, Bates, Bruck, Dierolf, Eisebitt, Fienup, Fienup, Fienup, Fienup, Gabor, Gabor, Gerchberg, Hans-Werner Fink, Hofstetter, Huang, Huang, Huiser, Huiser, Jean-Nicolas Longchamp, Latychevskaia, Latychevskaia, Latychevskaia, Latychevskaia, Longchamp, Maiden, Marchesini, Marchesini, Marchesini, McNulty, Miao, Miao, Millane, Nair, Nelson, Nishino, Raines, Sayre, Sayre, Seibert, Shapiro, Song, Spence, Steinwand, Steinwand, Tatiana Latychevskaia, Thibault, Thibault, Thibault, Vine, Weierstall, Whitehead, Wilke, Williams, Williams, Williams, Williams, Zuo   +60 more
core   +1 more source

Improvement of the monochrome image hologram by using a random phase and increasing number of Samples

مجلة بغداد للعلوم, 2008
This paper present a study about effect of the random phase and expansion of the scale sampling factors to improve the monochrome image hologram and compared it with previous produced others.
Baghdad Science Journal
doaj   +1 more source

Phase-Shifting Common-Path Polarization Self-Interferometry for Evaluating the Reconstruction of Holograms Displayed on a Phase-Only Display

Frontiers in Physics, 2022
In this work we apply a phase-shifting interferometry (PSI) to evaluate the reconstruction of complex-valued holograms displayed onto a phase-only spatial light modulator (SLM).
Esther Nabadda, Pascuala García-Martínez, María del Mar Sánchez-López, María del Mar Sánchez-López, Ignacio Moreno, Ignacio Moreno   +5 more
doaj   +1 more source

Maskless imaging of dense samples using pixel super-resolution based multi-height lensfree on-chip microscopy. [PDF]

, 2012
Lensfree in-line holographic microscopy offers sub-micron resolution over a large field-of-view (e.g., ~24 mm2) with a cost-effective and compact design suitable for field use. However, it is limited to relatively low-density samples.
Greenbaum, Alon, Ozcan, Aydogan
core   +1 more source

MODELLING AND RECONSTRUCTION OF GABOR-TYPE HOLOGRAMS

Dyna, 2011
Los procesos de modelación y reconstrucción de hologramas se soportan en el cálculo de la integral de difracción en su formulación de kirchhoff-fresnel o rayleight-sommerfeld. Dicha integral puede ser evaluada numéricamente por medio de diferentes formalismos: teorema de convolución, espectro angular y transformada de fresnel, entre otras.
J. LORA, GABRIEL, MUNERA, NATALIA, GARCIA-SUCERQUIA, JORGE   +2 more
openaire   +5 more sources

Compression of Phase-Only Holograms with JPEG Standard and Deep Learning

Applied Sciences, 2018
It is a critical issue to reduce the enormous amount of data in the processing, storage and transmission of a hologram in digital format. In photograph compression, the JPEG standard is commonly supported by almost every system and device.
Shuming Jiao, Zhi Jin, Chenliang Chang, Changyuan Zhou, Wenbin Zou, Xia Li   +5 more
doaj   +1 more source