Results 171 to 180 of about 36,249 (243)

On-chip dual quantum walk comb in the mid-infrared

Montesinos-Ballester M, Miller L, Gini E, Beck M, Faist J.   +4 more
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Experimental observation and theoretical analysis of the low-frequency source interferogram and hologram in shallow water

Journal of Sound and Vibration, 2022
: The interference pattern of the sound field of a broadband source in a shallow water waveguide is studied theoretically and experimentally in this paper.
Matthias Ehrhardt, S. Pereselkov, V. Kuz’kin, I. Kaznacheev, P. Rybyanets   +4 more
semanticscholar   +1 more source

Fast demodulation of single-shot interferogram via convolutional neural network

, 2021
In this report, a method is proposed to demodulate a single-shot interferogram based on deep learning using a convolutional neural network (CNN). The time required to demodulate a single interferogram is on the order of milliseconds. The root mean square
Xin Liu, Zhongming Yang, Jiantai Dou, Zhaojun Liu   +3 more
semanticscholar   +1 more source

Spiral interferogram analysis

Journal of the Optical Society of America A, 2006
Interference microscopy using spatial Fourier filtering with a vortex phase element leads to interference fringes that are spirals rather than closed rings. Depressions and elevations in the optical thickness of the sample can be distinguished immediately by the sense of rotation of the spirals. This property allows an unambiguous reconstruction of the
Alexander, Jesacher, Severin, Fürhapter, Stefan, Bernet, Monika, Ritsch-Marte   +3 more
openaire   +2 more sources

Interferogram Analysis for Optical Testing

, 2018
(condensed). Review and Comparison of the Main Interferometric Systems: Two-Wave Interferometers and Configurations Used in Optical Testing. Twyman-Green Interferometer. Fizeau Interferometers.
D. Malacara, M. Servin, Z. Malacara
semanticscholar   +1 more source

Single frame interferogram evaluation

Applied Optics, 2008
We present a simple and novel algorithm for the phase extraction from a single interferogram based on the spatial processing of interference patterns. This new evaluation procedure is suitable for application in environments where the presence of vibrations impedes the use of a classical phase-shifting interferometry scheme with multiple exposures. The
Eugenio, Garbusi, Christof, Pruss, Wolfgang, Osten   +2 more
openaire   +2 more sources

Large-Scale Multibaseline Phase Unwrapping: Interferogram Segmentation Based on Multibaseline Envelope-Sparsity Theorem

IEEE Transactions on Geoscience and Remote Sensing, 2019
Multibaseline (MB) phase unwrapping (PU) is a critical processing step for the MB synthetic aperture radar interferometry (InSAR). Compared with the traditional single-baseline (SB) PU, MB PU has wider application scope on the study area with strong ...
Hanwen Yu, Yuan Zhou, Stephanie Ivey, Yang Lan   +3 more
semanticscholar   +1 more source

End-to-End Direct Phase Retrieval From a Single-Frame Interferogram Based on Deep Learning

IEEE Transactions on Instrumentation and Measurement
In the field of optical interferometry, phase retrieval is a critical step in acquiring the phase information of fringes. Various deep-learning-based methods have been proposed for phase retrieval from a single-frame interferogram.
Tianshan Zhang, Mingfeng Lu, Yao Hu, Qun Hao, Jinmin Wu, Nan Zhang, Shuai Yang, Wenjie He, Feng Zhang, Ran Tao   +9 more
semanticscholar   +1 more source

Demodulation of a single closed-fringe interferogram with symmetric wavefront and tilt

Optics Communications, 2019
A phase recovery method from a single fringe pattern with closed fringes is developed. The interferogram is first normalized and then rotated to create a new fringe pattern.
J. Muñoz-Maciel, V. Durán-Ramírez, M. Mora-González, F. Casillas-Rodríguez, F. G. Peña-Lecona   +4 more
semanticscholar   +1 more source