Results 71 to 80 of about 129 (117)
Fabrication of diffraction grating for X-ray Talbot interferometer
Proceedings of JSPE Semestrial Meeting, 2005 Takiguchi, Kinji +6 more
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A Talbot interferometer with circular gratings
Optics Communications, 1972Abstract The linear gratings in our Talbot interferometer are replaced by circular gratings. This new radial shearing interferometer is sensitive to the radial gradient of the object.
A W Lohmann
exaly +2 more sources
Analysis of polychromaticity effects in X-ray Talbot interferometer
Analytical and Bioanalytical Chemistry, 2010The influence of polychromaticity of the X-ray source on the performance of an X-ray Talbot interferometer applied for phase-contrast imaging is analyzed through numerical simulations based on the Fresnel diffraction theory. The presented simulation results show that the visibility of the self-image is fairly insensitive to the source polychromaticity ...
Kai Zhang, Qingxi Yuan, Zhang Huitao
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Investigation of the partially coherent effects in a 2D Talbot interferometer
Analytical and Bioanalytical Chemistry, 2011The recent use of a one-dimensional (1D) X-ray Talbot interferometer has triggered great interest in X-ray differential phase contrast imaging. As an improved version of a 1D interferometer, the development of two-dimensional (2D) grating interferometry strongly stimulated applications of grating-based imaging.
Kai Zhang, Zhongzhu Zhu, Dajiang Wang
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Quantitative coherence analysis with an X-ray Talbot–Lau interferometer
Analytical and Bioanalytical Chemistry, 2010Differential phase-contrast (DPC) X-ray imaging has been performed in the Talbot-Lau configuration, in which the X-ray source was a combination of an absorption grating and a laboratory X-ray generator. We report here quantitative analysis of partial coherence effects on the X-ray Talbot-Lau interferometer.
Kai Zhang, Qingxi Yuan, Zhang Huitao
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Sensitivity of x-ray phase tomography based on Talbot and Talbot-Lau interferometer
Proceedings of SPIE, 2008The sensitivity of X-ray phase tomography based on Talbot(-Lau) interferometry is discussed. A criterion is described to evaluate the superiority of the technique in comparison to the conventional absorption-contrast method. An experimental result of X-ray phase tomography with a Talbot interferometer is compared with the criterion.
Wataru Yashiro +2 more
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Flexible X-ray Talbot-Lau grating interferometer
2021 IEEE International Conference on Medical Imaging Physics and Engineering (ICMIPE), 2021Yalin Lu, Yangchao Tian
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Sampling Talbot Interferometer
SPIE Proceedings, 1990We describe an optical setup based in the Talbot effect, which uses two mutually incoherent sets of self-images to display simultaneously interferometric bright-field and dark-field images, in almost any combination of two complementary view-fields. This feature allows us to sample the object under test in many different places. A spatial filter can be
E. Tepichin, J. Ibarra
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An interferometer based on the Talbot effect
Optics Communications, 1971Abstract The moire effect is very sensitive in detecting small differences between two similar gratings. These differences might be caused by an object with phase gradient placed between the two gratings. The performance of such an instrument can be understood in terms of the “Talbot effect” (also called “Fourier imaging” or “self-imaging”).
A.W. Lohmann, D.E. Silva
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Talbot interferometer as a time filter
Diffractive Optics and Micro-Optics, 2000The Talbot interferometer consists of two gratings at a finite distance from each other. We consider a configuration of two phase gratings where the second coherently combines the diffraction orders generated by the first grating and discuss its use as a temporal filter. .
Jürgen Jahns +3 more
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