Results 241 to 250 of about 28,756 (270)

Holographic optical elements for combined holographic and digital speckle pattern interferometry

SPIE Proceedings, 2003
Holographically recorded diffractive optical elements are described, which can be used to implement very simple self-aligning electronic speckle pattern interferometers (ESPI) and holographic interferometers requiring only a laser source and a CCD camera in the optical set-up.
Guntaka, S. R., Bowe, B., Toal, V., Martin, S.   +3 more
openaire   +2 more sources

Digital holographic interferometry for the nanodisplacement measurement

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
The sensitivity of digital holographic interferometry methods for a surface nanodisplacement measurement is represented. The effect of hardware digitalization parameters on the sensitivity of digital holographic measurements is considered. The investigation of surface-acoustic waves was carried out by digital holographic interferometry technique in ...
I. V. Alexeenko, M. E. Gusev, V. I. Redkorechev, A. Y. Zyubin, I. G. Samusev   +4 more
openaire   +1 more source

Deep learning based single shot multiple phase derivative retrieval method in multi-wave digital holographic interferometry

Optics and lasers in engineering, 2023
Allaparthi Venkata Satya Vithin, J. Ramaiah, Rajshekhar Gannavarpu   +2 more
semanticscholar   +1 more source

Digital holographic interferometry in quasi real time

SPIE Proceedings, 2003
Methods of real-time reconstruction of digitally recorded off-line microinterferograms working in Fresnel and Fourier configuration are presented. The principle of numerical calculations is described. Exemplary reconstructions of some holographic images, especially for digital holographic interferometry, are shown.
Romuald Jozwicki, Slawomir Pasko
openaire   +1 more source

Convolutional and fourier neural networks for speckle denoising of wrapped phase in digital holographic interferometry

Optics Communications, 2023
Qiang Fang, Qian Li, Qinghe Song, S. Montrésor, P. Picart, H. Xia   +5 more
semanticscholar   +1 more source

On the assessment of de-noising algorithms in digital holographic interferometry and related approaches

Applied physics B, 2022
S. Montrésor, P. Picart
semanticscholar   +1 more source

3D digital holographic interferometry

2022
Fernando Mendoza-Santoyo, Manuel De la Torre-Ibarra, María del Socorro Hernández-Montes, Jorge Mauricio Flores Moreno   +3 more
openaire   +1 more source

Digital Holographic Interferometry and Phase-Shifting Digital Holography

2015
If the holograms of the object are digitally recorded using a CCD camera and they are compared by computing the phase difference of the digitally reconstructed images, then the process is called digital holographic interferometry (DHI). In current technology, commercial CCD cameras have pixel sizes around 5 mm, which can sometimes limit the spatial ...
Georges T. Nehmetallah, Rola Aylo, Logan A. Williams   +2 more
openaire   +1 more source

0.1-5  MHz ultrahigh-speed gas density distributions using digital holographic interferometry.

Applied Optics, 2022
N. Rodrigues, Alex D. Brown, T. Meyer, R. Lucht   +3 more
semanticscholar   +1 more source

Digital Holographic Interferometry for Radiation Dosimetry

2015
A novel optical calorimetry approach is proposed for the dosimetry of therapeutic radiation, based on the optical technique of Digital Holographic Interferometry (DHI). This detector determines the radiation absorbed dose to water by measurement of the refractive index variations arising from radiation induced temperature increases. The output consists
openaire   +2 more sources