Open AccessMeasuring extinction with digital holography: nonspherical particles and experimental validation
Author(s) -
Matthew J. Berg,
Nava R. Subedi,
Peter Anderson
Publication year - 2017
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.42.001011
Subject(s) - holography , optics , extinction (optical mineralogy) , cross section (physics) , range (aeronautics) , physics , absorption (acoustics) , digital holography , particle (ecology) , materials science , geology , oceanography , quantum mechanics , composite material
Through simulations and experiment, this Letter shows how a particle's extinction cross section can be extracted from a digital hologram. Spherical and nonspherical particles are considered covering a range of cross-sectional values of nearly five orders of magnitude. The extracted cross sections are typically less than 10% in error from the true values. It is also shown that holograms encompassing a sufficiently large angular range of scattered light yield an estimate for the absorption cross section.