@article{HassMuenzbergBresseletal.2013,
  author    = {Hass, Roland and M{\"u}nzberg, Marvin and Bressel, Lena and Reich, Oliver},
  title     = {Industrial applications of photon density wave spectroscopy for in-line particle sizing [Invited]},
  series = {Applied optics},
  volume    = {52},
  journal   = {Applied optics},
  number    = {7},
  publisher = {Optical Society of America},
  address   = {Washington},
  issn      = {1559-128X},
  doi       = {10.1364/AO.52.001423},
  pages     = {1423 -- 1431},
  year      = {2013},
  abstract  = {Optical spectroscopy in highly turbid liquid material is often restricted by simultaneous occurrence of absorption and scattering of light. Photon Density Wave (PDW) spectroscopy is one of the very few, yet widely unknown, technologies for the independent quantification of these two optical processes. Here, a concise overview about modern PDW spectroscopy is given, including all necessary equations concerning the optical description of the investigated material, dependent light scattering, particle sizing, and PDW spectroscopy itself. Additionally, it is shown how the ambiguity in particle sizing, arising from Mie theory, can be correctly solved. Due to its high temporal resolution, its applicability to highest particle concentrations, and its purely fiber-optical probe, PDW spectroscopy possesses all fundamental characteristics for optical in-line process analysis. Several application examples from the chemical industry are presented. (C) 2013 Optical Society of America},
  language  = {en}
}
@article{BresselHassReich2013,
  author    = {Bressel, Lena and Hass, Roland and Reich, O.},
  title     = {Particle sizing in highly turbid dispersions by Photon Density Wave spectroscopy},
  series = {JOURNAL OF QUANTITATIVE SPECTROSCOPY \& RADIATIVE TRANSFER},
  volume    = {126},
  journal   = {JOURNAL OF QUANTITATIVE SPECTROSCOPY \& RADIATIVE TRANSFER},
  number    = {1},
  publisher = {PERGAMON-ELSEVIER SCIENCE LTD},
  address   = {OXFORD},
  issn      = {0022-4073},
  doi       = {10.1016/j.jqsrt.2012.11.031},
  pages     = {122 -- 129},
  year      = {2013},
  abstract  = {Photon Density Wave (PDW) spectroscopy is presented as a fascinating technology for the independent determination of scattering (mu(s)\’ and absorption (ita) properties of highly turbid liquid dispersions. The theory is reviewed introducing new expressions for the PDW coefficients k(I) and k(Phi). Furthermore, two models for dependent scattering, namely the hard sphere model in the Percus-Yevick Approximation (HSPYA) and the Yukawa model in the Mean Spherical Approximation (YMSA), are experimentally examined. On the basis of the HSPYA particle sizing is feasible in dispersions of high ionic strength. It is furthermore shown that in dialyzed dispersions or in technical copolymers with high particle charge only the YMSA allows for correct dilution-free particle sizing. (C) 2013 Elsevier Ltd. All rights reserved.},
  language  = {en}
}