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Optical diffraction tomography provides a powerful tool for imaging the 3-D refractive index (RI) distribution. However the method suffers from two major issues. The first one is the missing cone problem that comes from limited illumination angles. The missing cone problem can be dealt with sparsity based regularization [1]. The second problem is the nonlinear relationship between the refractive index...
Control of light propagation is usually obtained by appropriately designing the optical path, that is, the refractive index of the material. Common examples are standard lenses and dielectric waveguides. Recently, a new way to tailor the wave front emerged, based on the Pancharatnam-Berry phase (PBP). The PBP is a geometric phase related to changes in the polarization state of light along its propagation...
Track error (TE) detection system for readout of a high density super-resolution optical disc beyond Blu-ray Disc unaccompanied by its complication, based on a differential phase detection method is proposed. An evaluation of quality of TE signal with this system is described on a numerical simulation using experimentally acquired readout signal of the super-resolution optical disc.
We demonstrate that optical image processing based on a spontaneous optical pattern formation from an initial seed optical pattern in an optoelectronic feedback system with electronic distortion correction.
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