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Linear algorithms for phase retrieval in the Fresnel region. 3. Validity conditions |
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10.1016/j.optcom.2017.08.039 |
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We describe the relationship between different forms of linearized expressions for the spatial distribution of intensity of X-ray projection images obtained in the Fresnel region. We prove that under the natural validity conditions some of the previously published expressions can be simplified without a loss of accuracy. We also introduce modified validity conditions which are likely to be fulfilled in many relevant practical cases, and which lead to a further significant simplification of the expression for the image-plane intensity, permitting simple non-iterative linear algorithms for the phase retrieval. |
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Optics Communications, v.405, p. 394-399 |
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