Results 71 to 80 of about 28,649 (251)

Multicascade-linked synthetic wavelength digital holography using an optical-comb-referenced frequency synthesizer [PDF]

, 2018
Digital holography (DH) is a promising method for non-contact surface topography because the reconstructed phase image can visualize the nanometer unevenness in a sample.
ABRAHAM, Emmanuel, IBRAHIM, Dahi Ghareab Abdelsalam, IWATA, Tetsuo, KAWAHITO, Yusuke, MINAMIKAWA, Takeo, MINOSHIMA, Kaoru, MIZUNO, Takahiko, MIZUTANI, Yasuhiro, OE, Ryo, OGAWA, Takayuki, SHIBUYA, Kyuki, TROVATO, Clément, YAMAGIWA, Masatomo, YAMAMOTO, Hirotsugu, YASUI, Takeshi   +14 more
core   +1 more source

Full‐color holographic image capture: Cholesteric liquid crystal circular polarizer combined with geometric phase lens reduces noise in self‐interference incoherent digital holography

Journal of the Society for Information Display, EarlyView.
By using cholesteric liquid crystals as circular polarization filters in quarter‐waveplate condition GPL (QW‐GPL) based SIDH, a stable circular polarization state is ensured, which reduces color distortion and polarization noise, thereby significantly enhancing the reconstructed image quality in full‐color QW‐GPL‐based SIDH.
Jin‐Hyeok Seo, Jae‐Won Lee, Jung‐Yeop Shin, Min‐Seok Kim, Young‐Min Cho, Hyeon‐Su Jeong, Erkhembaatar Dashdavaa, Kihong Choi, Keehoon Hong, Hak‐Rin Kim   +9 more
wiley   +1 more source

Heterodyne Holography with full control of both signal and reference arms

, 2015
Heterodyne holography is a variant of phase shifting holography in which reference and signal arms are controlled by acousto optic modulators. In this review paper, we will briefy describe the method and its properties, and we will illustrate its ...
Gross, Michel
core   +2 more sources

Portable Filter-Free Lens-Free Incoherent Digital Holography System

Photonics
A portable incoherent digital holography system without a polarization filter or a refractive lens was developed. Phase-shifted self-interference incoherent holograms of light diffracted from an object were generated without attenuation due to a ...
Tatsuki Tahara
doaj   +1 more source

Measurements of the Characteristics of Transparent Material Using Digital Holography

Advances in Materials Science and Engineering, 2013
Digital holography is applied to measure the characteristics of transparent material. A digital hologram recording system to measure the surface of transparent material was established, and the digital holograms of transparent object were obtained in ...
Ding Yu, Shang Wenbin, Yang Hong, Yang Yan   +3 more
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

Acousto-optically driven lensless single-shot ultrafast optical imaging

Light: Science & Applications, 2022
We demonstrate a versatile and user-friendly ultrafast single-shot imaging technique based on a simple and flexible acousto-optics spectro-temporal shaping stage combined with digital in-line holography.
Mohamed Touil, Saïd Idlahcen, Rezki Becheker, Denis Lebrun, Claude Rozé, Ammar Hideur, Thomas Godin   +6 more
doaj   +1 more source

Bendable Fiber Lens for Minimally Invasive Endoscopy

Laser &Photonics Reviews, EarlyView.
Translating ex vivo imaging to minimally invasive in vivo applications is of outstanding scientific and socioeconomic relevance. 3D imaging based on tiny lensless fiber endoscopes requires complex setups and computational schemes, so far. Bridging this gap, imaging through a unique optical fiber that mimics the functionality of a lens but is minimally ...
Ronja Stephan, Elias Scharf, Kinga Zolnacz, Waclaw Urbanczyk, Katharina Hausmann, Matthias Ließmann, Johannes Gürtler, Tom Glosemeyer, Jürgen Czarske, Michael Steinke, Robert Kuschmierz   +10 more
wiley   +1 more source

Hybrid correlation holography with a single pixel detector

, 2017
The correlation holography reconstructs 3D objects as a distribution of two-point correlation of the random field detected by two dimensional detector arrays.
Singh, Rakesh Kumar
core   +1 more source

High‐Speed Multimode Fiber Imaging Using Binary‐Modulated Silicon Photonics Optical Phased Array

Laser &Photonics Reviews, EarlyView.
A multimode fiber imaging system at 500 frames per second is experimentally demonstrated. It is enabled by a p‐i‐n diode‐based silicon photonics optical phased array. To simplify the electrical driving of p‐i‐n diodes, a binary modulation method with a costumed‐designed digital driver circuit is proposed. Reconstruction of each frame takes only 0.1 ms,
Gaolei Hu, Yue Qin, Hongnan Xu, Hon Ki Tsang   +3 more
wiley   +1 more source