Laura A. Waller

I was a member of the 3D Optical Systems Group at MIT, led by Prof. George Barbastathis. My PhD research was in complex-field (phase and amplitude) imaging and tomography, digital holography, 3D imaging and computational imaging techniques. I was a Singapore-MIT Alliance for Research and Technology (SMART) student, meaning I spent a few months a year doing research in Singapore. Here are a few of the projects I have worked on:

Research

A technique inspired by Transport of Intensity (TIE) imaging, we obtain phase from a single color image using partially coherent illumination, by quantifying the color dispersion through the imaging system.

Phase from chromatic aberrations

We use TIE imaging techniques to obtain phase information from a single captured image in a Volume Holographic Microscope (VHM).

 

Quantitative phase imaging in a

Volume Holographic Microscope

We monitor 2D changes in water content of a Proton Exchange Membrane (PEM) fuel cell system in-situ in order to enable more efficient fuel cell technologies.

Two-angle phase tomography of fuel cell

water content

By phase-shifting Mach-Zehnder interferometry with a rotation stage, we obtain 3D phase and amplitude distributions of complex objects and study the system errors.

Complex-field tomography

We propose a method for extending the TIE technique to longer distances and multiple images by measuring and correcting for higher order nonlinearities.

Transport of Intensity imaging with

higher order derivatives

We apply a Complex Extended Kalman Filter to the problem of solving for amplitude and phase from a very noisy set of through-focus intensity images.

Complex-field imaging from noisy intensity measurements using a Kalman filter