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US 7,889,838 B2Granted
Interferometer for quantitative phase contrast imaging and tomography with an incoherent polychromatic x-ray source
AssigneePaul Scherrer Institut
InventorsChristian David, Franz Pfeiffer, Timm Weitkamp
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Abstract
An interferometer for X-rays, in particular hard X-rays, for obtaining quantitative phase contrast images, includes a standard polychromatic X-ray source, a diffractive optical beam splitter other than a Bragg crystal in transmission geometry, and a position-sensitive detector with spatially modulated detection sensitivity.
Claims23
An interferometer for X-rays, in particular hard X-rays, for obtaining quantitative phase contrast images, comprising:
- a) a standard polychromatic X-ray source,
- b) a diffractive optical beam splitter other than a Bragg crystal in transmission geometry, and
- c) a position-sensitive detector with spatially modulated detection sensitivity.
An interferometer for X-rays, in particular hard X-rays, for obtaining quantitative phase contrast images, comprising:
- a) a standard polychromatic X-ray source,
- b) a diffractive optical beam splitter other than a Bragg crystal in transmission geometry,
- c) a position-sensitive detector with spatially modulated detection sensitivity;
- and
- d) a mechanism configured to perform a one- or two-dimensional phase stepping scan by lateral transverse movement of one of the X-ray source, an aperture located in front of the X-ray source, the beam splitter, and the analyzer grating.
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Dependencies are inferred from the claim text.