Dissertation/Thesis Abstract

Quantitative phase information from differential interference contrast microscopy
by King, Sharon Victoria, Ph.D., University of Colorado at Boulder, 2008, 157; 3337213
Abstract (Summary)

Quantitative phase imaging is of interest in fields, such as cell biology and integrated optics, which require measurement of the thickness and refractive properties of weak phase objects embedded in a medium. Existing methods of processing Nomarski differential interference contrast (DIC) images post acquisition can provide high contrast, high resolution quantitative phase images of these types of objects, but require further development to obtain quantitative information.

This dissertation extends the implementation of the spiral phase integration of phase-shifted differential interference contrast images in three main areas: experimentation through evaluation of its sources of error, calibration of the spiral phase integration result, and investigation of novel applications to cell biology. A model of the Senarmont compensator configuration required for accurate phase shifting is derived, evaluated and compared with Nomarski phase-shifting differential interference contrast.

The spiral phase integration method is shown to extract accurate quantitative phase information from experimentally acquired phase-shifted differential interference contrast images of partially absorbing embedded objects. Simulation and experiment show that images obtained using the Sernamont compensator configuration of DIC microscopy are qualitatively similar to those obtained with the traditional Nomarski configuration, but theoretical differences exist between the two systems.

These results both demonstrate and improve the experimental use of the differential interference contrast microscope as a high quality phase measurement tool.

Indexing (document details)
Advisor: Cogswell, Carol J., Piestun, Rafael
School: University of Colorado at Boulder
Department: Electrical Engineering
School Location: United States -- Colorado
Source: DAI-B 69/11, Dissertation Abstracts International
Subjects: Biomedical engineering, Electrical engineering
Keywords: Differential interference contrast microscopy, Microscopy, Spiral phase integration
Publication Number: 3337213
ISBN: 9780549919209
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