Results 221 to 230 of about 4,533 (261)

Testing of x-ray prism lenses

SPIE Proceedings, 2008
X-ray prism lenses have been defined with the aim to collimate X-ray radiation emitted from an X-ray tube working as a condenser lenses. Such a lens must have a large aperture as low absorption as possible. X-ray prism lenses combine low absorption and large apertures.
Simon, M., Reznikova, E., Nazmov, V., Umbach, M., Last, A.   +4 more
openaire   +2 more sources

Multi-prism x-ray lens

Applied Physics Letters, 2002
Refractive x-ray lenses with a triangular surface profile have been used to focus a synchrotron beam to sub-μm line width. These lenses are free from spherical aberration and work in analogy with one-dimensional focusing parabolic compound refractive lenses.
Björn Cederström, Mats Lundqvist, Carolina Ribbing   +2 more
openaire   +1 more source

Shearing X-ray interferometer with an X-ray prism and its improvement

Journal de Physique IV (Proceedings), 2003
A wave-front dividing interferometer was devised in which half of a highly spatially coherent beam deflected by an x-ray prism is overlapped with another half. By placing the samples in the two beams and the x-ray imaging detector closely downstream of the sample, the differential phase of the sample is recorded on the imaging detector.
Y. Kohmura, H. Takano, Y. Suzuki, T. Ishikawa   +3 more
openaire   +1 more source

X-ray prism lenses with large apertures

SPIE Proceedings, 2008
Existing refractive X-ray lenses are characterized by either small apertures due to high absorption in the border areas. They can only be used with synchrotron sources, offering high brilliance. By increasing transparency and aperture the range of applications will expand, common X-ray tubes might turn out to be reasonable X-ray sources in an ...
Simon, M., Reznikova, E., Nazmov, V., Last, A., Jark, W.   +4 more
openaire   +2 more sources

Imaging with multi-prism x-ray lenses

SPIE Proceedings, 2008
The multi-prism lens (MPL) is a refractive x-ray lens consisting of two rows of prisms facing each other at an angle.
Erik Fredenberg, Björn Cederström, Magnus Åslund, Peter Nillius, Mats Lundqvist, Mats Danielsson   +5 more
openaire   +1 more source

Development of an x-ray prism for analyzer based imaging systems

Review of Scientific Instruments, 2010
Analyzer crystal based imaging techniques such as diffraction enhanced imaging (DEI) and multiple imaging radiography (MIR) utilize the Bragg peak of perfect crystal diffraction to convert angular changes into intensity changes. These x-ray techniques extend the capability of conventional radiography, which derives image contrast from absorption, by ...
Brian, Bewer, Dean, Chapman
openaire   +2 more sources

X-ray Holographic Microscopy by Double-Prism Interferometer

Japanese Journal of Applied Physics, 2010
An optical system for X-ray holographic microscopy has been developed. The optical system consists of a double-prism X-ray interferometer and an X-ray imaging microscope with a Fresnel zone plate objective. One prism is placed at the object plane of the microscope, and the other is set at the back focal plane of the objective lens.
Yoshio Suzuki, Akihisa Takeuchi, Ken Harada   +2 more
openaire   +1 more source

X-ray refractive large aperture rolled prism lenses as condensers for x-ray tubes

SPIE Proceedings, 2011
At the Institute of Microstructure Technology (IMT) at Karlsruhe Institute of Technology (KIT), refractive X-ray optics are developed. These optics are proposed to be used as condenser optics in X-Ray spectroscopy and microscopy applications with an X-ray tube as a source.
Vogt, H., Simon, M., Last, A., Marschall, F., Mohr, J., Nazmov, V., Eisenhower, R., Mettendorf, K. U.   +7 more
openaire   +1 more source

Focusing x-rays in two dimensions upon refraction in an inclined prism

SPIE Proceedings, 2014
In order to focus light in two dimensions a lens needs to be curved in two orthogonal directions. When the lens is symmetrically oriented around the optical axis this is usually achieved in an object with at least one rotationally symmetric surface. X-rays are refracted very little in such configuration as the refractive index differs very little from ...
Jark W., Grenci G.
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The Refraction of X-Rays in Prisms of Various Materials

Physical Review, 1926
The method consisted in the use of the "double x-ray spectrometer" for measuring the extremely small changes in angle produced by refraction in prisms, which were placed between two crystals. The rocking curves from the second crystal were from 6 to 10 seconds of arc wide at half maximum and, under favorable temperature conditions, a shift of.2 seconds
openaire   +1 more source