Phase contrast imaging method and apparatus
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United States of America Patent
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Oct 18, 2011
Grant Date -
Feb 3, 2011
app pub date -
Feb 16, 2009
filing date -
Mar 5, 2008
priority date (Note) -
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Abstract
A method for phase contrast imaging comprises: illuminating an object by terahertz radiation such that the terahertz radiation interacts with the object; illuminating a diffraction grating by the terahertz radiation that has interacted with the object; translating the diffraction grating along the direction of the grating wave vector, to measure, for each of different grating positions, an intensity distribution of the terahertz radiation that has interacted with the object and with the grating in a diffraction field; and retrieving a phase contrast image of the object from the intensity distributions. An apparatus for phase contrast imaging is also provided.
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