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We describe several techniques for phase-shifting digital holography based on single-pixel detection and microstructured illumination. In particular, we present a high-speed holographic system based on a Mach-Zehnder interferometer that uses a digital micromirror device (DMD) to sample the object with a sequence of phase patterns. The DMD is also used for phase shifting and for wavefront correction...
We describe a method to image objects through scattering media based on microstructured illumination. A spatial light modulator is used to project a set of microstructured light patterns onto the sample. The image is retrieved computationally from the photocurrent fluctuations provided by a detector with no spatial structure. We review several optical setups developed in the last years with different...
We describe several approaches to perform digital holography with single-pixel detection by using phase-structured illumination and compressive sensing. Single-pixel imaging works by sampling the scene with micro-structured amplitude patterns implemented onto a spatial light modulator and recording light intensity fluctuation with a simple photodiode. Recently, we have demonstrated the capability...
We present an optical system for stereoscopic color imaging by using a single-pixel detector. The system works by illuminating the input scene with a sequence of microstructured light patterns generated by a color digital light projector (DLP). A single monochromatic photodiode, synchronized with the DLP, measures the light scattered by the object for each pattern. The image is recovered computationally...
Compressive sensing is an emerging theory that shows a considerable variety of applications in the field of imaging techniques. In particular, a practical challenge addressed by compressive sampling is the design of optical systems able to provide spatial information about specific optical properties of an object. As an example of this kind of advanced imaging techniques, we present an optical architecture...
We develop a single-pixel modality of digital holography inspired by the concepts of quantum heterodyne “ghost” imaging. Phase imaging of structured objects at nanometer resolution is reported.
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