Open AccessQuantitative phase imaging by three-wavelength digital holography
Author(s) -
Christopher Mann,
Philip R. Bingham,
Vincent Paquit,
Kenneth W. Tobin
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.009753
Subject(s) - optics , digital holography , wavelength , holography , phase (matter) , wavefront , physics , materials science , quantum mechanics
Three-wavelength digital holography is applied to obtain surface height measurements over several microns of range, while simultaneously maintaining the low noise precision of the single wavelength phase measurement. The precision is preserved by the use of intermediate synthetic wavelength steps generated from the three wavelengths and the use of hierarchical optical phase unwrapping. As the complex wave-front of each wavelength can be captured simultaneously in one digital image, real-time performance is achievable.