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Opt Lett. 2010 Dec 1;35(23):3919-21. doi: 10.1364/OL.35.003919.

Common-path phase-shifting lensless holographic microscopy.

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Departamento de Óptica, Universitat de Valencia, Doctor Moliner, 50, 46100 Burjassot, Spain.


We present an approach capable of high-NA imaging in a lensless digital in-line holographic microscopy layout even outside the Gabor's regime. The method is based on spatial multiplexing at the sample plane, allowing a common-path interferometric architecture, where two interferometric beams are generated by a spatial light modulator (SLM) prior to illuminating the sample. The SLM allows phase-shifting interferometry by phase modulation of the SLM diffracted beam. After proper digital processing, the complex amplitude distribution of the diffracted object wavefront is recovered and numerically propagated to image the sample. Experimental results are reported that validate the proposed method.

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