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Demonstrates a new analytical model for coherent diffractive imaging, suggesting improved accuracy in measurements.
A linear model for coherent diffractive imaging (CDI) is proposed herein. In this model, CDI is expressed as a system of linear equations in the frequency domain of an object and illumination. The linear system can be directly determined to provide a unique solution for complex samples. The method is analytical and straightforward and does not require any approximation. The simulation results demonstrate that the proposed method is valid for all CDI-related imaging methods, such as traditional CDI, ptychography, coherent modulation imaging, and multiple-plane phase retrieval. The relationship between the method and the convergence of iterative phase retrieval is discussed. This mathematical model provides a direct method for analyzing the underlying physics of CDI and can be used to predict the accuracy and error in CDI applications, such as measurement and metrology.
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He et al. (2022) studied this question.
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