Kedar Khare is currently an Associate Professor in the Department of Physics, Indian Institute of Technology Delhi, India. His research interests include problems in computational optical imaging. In recent years he has been actively engaged in pursuing research work on quantitative phase imaging, Fourier phase retrieval, computational microscopy, diagnostic imaging, cryo-EM imaging and structured light propagation in turbulence. Priyanka Lochab is currently a Research Associate in the Department of Physics, Indian Institute of Technology Delhi, India. Her research career in optics began in 2013 when she joined IIT Delhi as a graduate student. Her major research interests are singular optics, beam propagation through random media and computational imaging. Paramasivam Senthilkumaran is currently working as a full Professor in the Department of Physics, Indian Institute of Technology Delhi, India. His research interests are optical beam shaping, optical phase singularities, Berry and Pancharatnam topological phases, fiber optics, holography, non-destructive testing techniques, shear interferometry, Talbot interferometry, speckle metrology and non-linear optics.