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We present in this Letter a type of quadriwave lateral shearing interferometer for x-ray phase imaging. This device is based on a phase chessboard, and we take advantage of the large spectrum of the source to produce interferograms with a propagation-invariant contrast. Such a grating has been created for hard x-ray interferometry and experimentally tested on a synchrotron beamline at Soleil.
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http://dx.doi.org/10.1364/OL.36.001398 | DOI Listing |
This study investigates the surface modifications on fused silica caused by the ablation of glass and aluminum micro-particle contamination exposed to laser shots at a wavelength of 351 nm. The laser fluences used in this study range from 3.5 to 9.
View Article and Find Full Text PDFWavefront reconstruction is a key step in multilateral shearing interferometers, directly influencing measurement accuracy. Conventional zonal reconstruction methods typically use only two orthogonal difference wavefronts, which limits measurement accuracy. In this paper, we innovatively propose a zonal wavefront reconstruction method that utilizes multidirectional difference wavefronts, comprehensively considering all difference wavefront information in the interferogram.
View Article and Find Full Text PDFJ Opt Soc Am A Opt Image Sci Vis
November 2024
Quantitative phase imaging (QPI) has emerged as a powerful tool in label-free bioimaging, microstructure characterization for advanced manufacturing, and high-speed imaging of material property changes. Among various QPI methods, quadri-wave lateral shearing interferometry (QWLSI) stands out for its unique advantages in compactness, robustness, and high temporal resolution, making it an ideal choice for a wide range of applications. The compact design of QWLSI allows for easy integration with existing microscopy systems, while its robustness is manifested in the ability to maintain precise interferometric sensitivity even in high-vibration environments.
View Article and Find Full Text PDFJ Opt Soc Am A Opt Image Sci Vis
November 2024
We present an evolution of quadriwave lateral shearing interferometry that improves the definition of quantitative phase images. It is now possible to produce images with as many pixels as the camera that records the interferogram. This is done by moving a diffraction grating in front of the camera and linearly combining at least nine acquisitions.
View Article and Find Full Text PDFJ Opt Soc Am A Opt Image Sci Vis
November 2024
Quadriwave lateral shearing interferometry (QWLSI) is based on double birefringent crystals of a beam displacer (DBCs-BD), which can generate the lateral shearing interference wavefront of four beams of overlapped replicas in the DBCs-BD orthogonal directions. When the replica waves are overlapped incident to the analyzer and the direction of the transmission axis is set as 45° or 135°, the QWLSI's polarization interferogram can be obtained. This paper deduces the principle of QWLSI based on the DBCs-BD and presents the analysis of orthogonal error influence based on the DBCs-BD and the phase retrieval error of QWLSI when shear displacement by tilted incident on the DBCs-BD.
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