Results 171 to 180 of about 111,516 (212)

Sensitivity of x-ray phase tomography based on Talbot and Talbot-Lau interferometer

Proceedings of SPIE, 2008
The 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, Atsushi Momose, Norihide Maikusa   +2 more
exaly   +2 more sources

Investigation of the partially coherent effects in a 2D Talbot interferometer

Analytical and Bioanalytical Chemistry, 2011
The 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, Ziyu Wu
exaly   +3 more sources

Flexible X-ray Talbot-Lau grating interferometer

2021 IEEE International Conference on Medical Imaging Physics and Engineering (ICMIPE), 2021
Yalin Lu, Wu Zhao, Yangchao Tian
exaly   +2 more sources

Sampling Talbot Interferometer

SPIE Proceedings, 1990
We 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
openaire   +1 more source

A Talbot interferometer with circular gratings

Optics Communications, 1972
Abstract 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, D.E. Silva
openaire   +1 more source

An interferometer based on the Talbot effect

Optics Communications, 1971
Abstract 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
openaire   +1 more source

Lateral aberration measurements with a digital Talbot interferometer

Applied Optics, 1984
A new technique for computer-based Talbot interferometry is presented. Fast and automatic aberration measurement has been achieved with improved accuracy and sensitivity. Experimental results are given that agree with the results of calculation by ray tracing.
M, Takeda, S, Kobayashi
openaire   +2 more sources

Talbot interferometer with simultaneous dark and bright fields

Applied Optics, 1989
We describe an optical setup for implementing a Talbot interferometer that uses two mutually incoherent sets of self-images to simultaneously produce interference bands due to dark and bright fields. A spatial filter can be used to visualize these fields without interference fringes. Experimental results are included.
E, Tepichin, J, Ojeda-Castaneda
openaire   +2 more sources

Interferometer based on the Talbot effect in holography

Journal of Optics, 1995
This paper discloses an interferometer based on the Talbot effect in holography and combining in itself properties of the Talbot and of the holographic interferometers. The second grating is replaced with the hologram of the first grating in the interferometer proposed, which constitutes its difference from the Talbot interferometer and which results ...
A Maripov, Yu Ismanov
openaire   +1 more source

Electronic talbot interferometer

Optics and Lasers in Engineering, 1981
Abstract This paper explains theoretically the principle of the Talbot interferometer using two ‘Fourier images’. The experimental results show that video techniques are more useful for superimposing two ‘Fourier images’ than photographic techniques.
openaire   +1 more source