28 citations · 72 across the 8 of their papers we have counts for
8 papers
Shack Hartmann wavefront sensor with array of phase coded masks
Nitin Dubey, Ravi Kumar, Joseph Rosen
Shack-Hartmann wavefront sensors (SHWS) are generally used to measure the wavefront curvature of light beams. Measurement accuracy and the sensitivity of these sensors are importan…
Quantitative phase-contrast imaging: a bridge between qualitative phase-contrast and phase retrieval algorithms
Nathaniel Hai, Joseph Rosen
In the last five decades, iterative phase retrieval methods draw large amount of interest across the research community as a non-interferometric approach to recover quantitative ph…
Coded aperture correlation holographic microscope for single-shot quantitative phase imaging with extended field of view
Nathaniel Hai, Joseph Rosen
Recently, a method of recording holograms of coherently illuminated three-dimensional scene without two-wave interference was demonstrated. The method is an extension of the coded…
Improving Dynamic Range of Speckle Correlation based Optical Lever by spatial multiplexing
Vijayakumar Anand, Shanti Bhattacharya, Joseph Rosen
Speckle correlation based optical levers SC OptLev possess attractive characteristics suitable for sensing small changes in the angular orientations of surfaces. In this study, we…
SLM aided noninvasive imaging through thin scattering layers
Saswata Mukherjee, A. Vijayakumar, Joseph Rosen
We propose and demonstrate a new imaging technique to noninvasively see through scattering layers with the aid of a spatial light modulator (SLM). A relay system projects the incoh…
Implementation of a speckle correlation based optical lever (SC-OptLev) with extended dynamic range
A. Vijayakumar, D. Jayavel, M. Muthaiah +2
A speckle correlation based optical lever (SC-OptLev) is constructed for the measurement of small changes in the angle of orientation of a surface. The dynamic range of SC-OptLev i…
Binary square axicon with chiral focusing properties for optical trapping
Balasubramani Vinoth, Anand Vijayakumar, Mani Ratnam Rai +4
We introduce a novel phase-only diffractive optical element called chiral binary square axicon (CBSA). The CBSA is designed by linearly rotating the square half-period zones of the…
Incoherent digital holograms acquired by interferenceless coded aperture correlation holography system without refractive lenses
Manoj Kumar, A. Vijayakumar, Joseph Rosen
We present a lensless, interferenceless incoherent digital holography technique based on the principle of coded aperture correlation holography. The acquired digital hologram by th…