4.7 Article

Common-path quantitative phase imaging by propagation through a sinusoidal intensity mask

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OPTICS AND LASERS IN ENGINEERING
卷 171, 期 -, 页码 -

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ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2023.107805

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Quantitative phase imaging; Microscopy; Phase retrieval

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A new quantitative approach for phase retrieval is presented, which is derived from analyzing the light intensity propagation through a phase object and a sinusoidal intensity mask. Unlike the Transport of Intensity Equation (TIE), this new algorithm is simpler as it does not involve the Laplacian of the phase, and it can be easily implemented in practical applications.
We present a new quantitative approach for phase retrieval that is derived from the analysis of light intensity propagation through a phase object and a sinusoidal intensity mask positioned into the light path. Unlike the Transport of Intensity Equation (TIE), we deduce a new algorithm that results in a simpler expression since it does not include the Laplacian of the phase. In practice, the method is implemented in a common path optics where each optical component of the assembly remains fixed and phase unwrapping is not required. We introduce the analytical expressions for this algorithm and show experimental results including the phase retrieval of a phase object and of cheek cell samples.

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