Akanksha Gautam

Akanksha Gautam
Indian Institute of Technology (Banaras Hindu University) Varanasi | BHU · Department of Physics


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Publications (4)
Conference Paper
We have experimentally measured the complex spatial coherence function of a generic incoherent thermal source i.e. light emitting diode (LED) using a Sagnac radial shearing interferometer. Here, a very basic theory for incoherent light i.e. the van Cittert-Zernike theorem is used to connect the spatial coherence function with the source structure....
We present an approach to record incoherent vector holograms using a highly stable field-based interferometer employing radial shearing. The vector holograms are recorded as the elements of the 2x2 cross-spectral density (CSD) matrix and reconstruction of the object encoded into these holograms is demonstrated by digitally propagating the elements...
Conference Paper
Full-text available
Conventional digital holography uses the technique of combining two coherent light fields and the numerical reconstruction of the recorded hologram leads to the object amplitude and phase information. Despite significant developments in the DH with coherent light, complex field imaging with arbitrary coherent sources is also desired for various rea...
Conference Paper
We propose and demonstrate a new scheme for ghost polarimetry based on Stokes correlations. Generalized Stokes parameters are derived from few combinations of Stokes fluctuation correlation. These generalized Stokes parameters are subjected to a phase retrieval algorithm for the complete recovery of object in ghost polarimetry. Results are presente...