Abstract

A coherent imaging method with scanning illumination is presented in which a complex-valued object is reconstructed from far-field intensity measurement using a phase-retrieval method based on the properties of analytic functions. Previous scanning phase-retrieval method based on the analytic properties has utilized an exponential filter in the measurement: a probe beam and the probe beam that is modulated with the filter are scanned across the object. Without an exponential filter, the present method is capable of retrieving a phase from the measurement with one scanning procedure using a Gaussian-amplitude beam as a probe. Computer-simulated examples of the reconstruction of a complex-valued object demonstrate that the reconstruction is robust.

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