Photonics, 2022 The Fourier transform is a popular method for analyzing and processing interference data in which spectrum leakage occurs. Generally, window function (also called apodization function) weighting is employed to limit spectrum leakage. A rectangular window
Yusheng Qin +4 more
doaj +1 more source
Absorption and Light Localization in One-Dimensional Apodized Photonic Crystals
PhotonicsApodization is a well-known method designed to control the propagation of light in photonic crystals (PCs) and has a variety of applications. Apodization involves modulating the depth of refractive index variation in PCs.
Ilya M. Efimov +3 more
doaj +1 more source
Adaptive Receive and Transmit Apodization for Synthetic Aperture Ultrasound Imaging [PDF]
, 2009 This paper suggests a framework for utilizing adaptive, data-dependent apodization weights on both the receiving and transmitting aperture for Synthetic Aperture (SA) ultrasound imaging.
Andreas Austeng +11 more
core +1 more source
Interferometric apodization by homothety -- II. Experimental validation
, 2023 This work presents the results of experimental laboratory tests on the apodization of circular and rectangular apertures using the Interferometric Apodization by Homothety (IAH) technique.
Boskri, A +6 more
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Merged Mode TFM with Mode Conversion Artifact Suppression
Research and Review Journal of Nondestructive Testing, 2023 The objective of the paper is to compare the merits of the multiplication and max value schemes for producing a total focusing method (TFM) representation that combines multiple acoustic modes.
Chi-Hang Kwan +2 more
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Interferometric apodization of rectangular apertures
, 2001 We describe the principle of an apodization technique for rectangular apertures that can be implemented using a Michelson or a Mach-Zender interferometer. Using several interferometers, any integer power of cosine functions can be obtained. The technique
A. Ferrari, C. Aime, R. Soummer
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Phase-induced amplitude apodization complex-mask coronagraph tolerancing and analysis [PDF]
, 2018 Phase-Induced Amplitude Apodization Complex Mask Coronagraphs (PIAACMC) offer high-contrast performance at a small inner-working angle ( 70%). The complex mask is a multi-zone, phase-shifting mask comprised of tiled hexagons which vary in depth.
Knight, Justin M. +11 more
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Robustness of atmospheric trace gas retrievals obtained from low-spectral-resolution Fourier transform infrared absorption spectra under variations of interferogram length [PDF]
Atmospheric Measurement TechniquesThis study examines the sensitivity of atmospheric trace gas column retrievals from ground-based Fourier transform interferometer measurements to variations in the number of points in the recorded interferograms.
B. Langerock +9 more
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Moiré‐Induced Symmetry Breaking of Charge Order in van der Waals Heterostructures
Advanced Materials, EarlyView.A uniaxial moiré potential in misfit (MS)1+δTaS2 heterostructures selectively reshape charge order: the embedded 1H‐TaS2 layer hosts an incommensurate charge‐density wave, fragmented into nanometer domains and stripped of threefold symmetry. Superconductivity, however, remains uniform and fully gapped, revealing heterosymmetry stacking as a selective ...
Sandra Sajan +12 more
wiley +1 more source
Sidelobe Suppression Using the SVA Method for SAR Images and Sounding Radars [PDF]
, 2006 The method of Spatially Variant Apodization (SVA) has been developed for eliminating and suppressing sidelobes in SAR images as far as possible while maintaining the original image resolution.
Pupeza, E. P. Ioachim +2 more
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