title: Three-dimensional phase imaging with the intensity transport equation.
abstract: Phase can be retrieved from intensity measurements with the intensity transport equation. Three-dimensional image formation of weak phase objects based on this method is investigated. It is shown that, although the refractive index of a thin object can be measured, the three-dimensional variation of refractive index of an arbitrary object cannot, in general, be reconstructed, as spatial frequencies with a zero-axial component are not detected. However, this may not be a problem if regions with known refractive index are present in the sample.
authors.affiliation: Department of Applied Physics, Delft University of Technology, The Netherlands. colin@physics.usyd.edu.au
authors.forename: Colin J R
authors.initials: CJ
authors.lastname: Sheppard