Results 1 to 10 of about 3,717 (174)

Providing a Visual Understanding of Holography Through Phase Space Representations

Applied Sciences, 2020
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
Tobias Birnbaum, Tomasz Kozacki, Peter Schelkens   +2 more
doaj   +1 more source

A Recording Structure for Extending the Detection Angle in Off-Axis Digital Holography

IEEE Photonics Journal
In digital holography, the sampling of the object wavefront is determined by the spatial resolution of the image sensors, which limits the angle range of the object wavefront.
Yuanyuan Liu, Feiyan Hu, Qingwen Liu
doaj   +1 more source

High-fidelity full-color self-interference incoherent digital holography via quarter-wave geometric phase optics

Opto-Electronic Advances
We present a compact self-interference incoherent digital holography (SIDH) system that incorporates a quarter-waveplate (QWP)-based geometric phase (GP) lens to achieve high-fidelity, full-color holographic imaging under broadband incoherent ...
Jae-Won Lee, Jin-Hyeok Seo, Jung-Yeop Shin, Jing-Wen Bu, Kihong Choi, Keehoon Hong, Hak-Rin Kim   +6 more
doaj   +1 more source

Multiwavelength Digital Holography for Metrology: Low-Coherent Noise Sensor Configuration and Its Application [PDF]

EPJ Web of Conferences
The demand for 100% inspection is increasing due to rising quality requirements in manufacturing. Multiwavelength Digital Holography (MDH) has emerged as a promising sensing technology capable of achieving both high throughput and high resolution ...
Matsuura Shimpei, Mukundakumar Balasubrahmaniyam, Suzuki Raiitsu, Barczyk René   +3 more
doaj   +1 more source

Speckle Reduction in Digital Holography by Fast Logistic Adaptive Non-Local Means Filtering

Photonics
Digital holography is a promising imaging technology. However, there is speckle noise in the reconstructed image of a digital hologram. Speckle degrades the quality of the reconstructed image.
Yiping Fu, Junmin Leng, Zhenqi Xu
doaj   +1 more source

Application of Infrared Digital Holography for Characterization of Inhomogeneities and Voluminous Defects of Single Crystals on the Example of ZnGeP₂

Applied Sciences, 2020
In this work, the method of IR digital holography intended for detection of volumetric defects in ZnGeP2 single crystals has been tested. The holographic method is verified by a comparison of the results obtained with the data obtained by other methods ...
Victor Dyomin, Alexander Gribenyukov, Sergey Podzyvalov, Nikolay Yudin, Mikhail Zinoviev, Igor Polovtsev, Alexandra Davydova, Alexey Olshukov   +7 more
doaj   +1 more source

Extending the Depth of Field beyond Geometrical Imaging Limitations Using Phase Noise as a Focus Measure in Multiwavelength Digital Holography

Applied Sciences, 2018
Digital holography is a well-established technology for optical quality control in industrial applications. Two common challenges in digital holographic measurement tasks are the ambiguity at phase steps and the limited depth of focus.
Tobias Seyler, Markus Fratz, Tobias Beckmann, Annelie Schiller, Alexander Bertz, Daniel Carl   +5 more
doaj   +1 more source

Digital holography - an innovative technology for analysis of living cells

Bioingeniøren, 2010
Background: Digital holography is a novel technique which has been used for about five years to study living cells. The technique is an innovative, non-destructive method with possibilities to study living cells over time.
Zahra El-Schish, Anna Mölder, Mikael Sebesta, Anette Gjörloff Wingren   +3 more
doaj  

Wavefront division digital holography

AIP Advances, 2018
Digital holography (DH), mostly Mach-Zehnder configuration based, belongs to non-common path amplitude splitting interference imaging whose stability and fringe contrast are environmental sensitive.
Wenhui Zhang, Liangcai Cao, Rujia Li, Hua Zhang, Hao Zhang, Qiang Jiang, Guofan Jin   +6 more
doaj   +1 more source

Digital Holography Data Compression

Telfor Journal, 2019
Digital holography processing is a research topic related to the development of novel visual immersive applications. The huge amount of information conveyed by a digital hologram and the different properties of holographic data with respect to ...
R. Corda
doaj   +1 more source