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An Investigation of the Use of a CCD Camera for the Characterisation of Irregular Particles
Author(s) -
Card Jacqueline B. A.,
Jones Alan R.
Publication year - 1999
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/(sici)1521-4117(199908)16:3<135::aid-ppsc135>3.0.co;2-9
Subject(s) - reciprocity (cultural anthropology) , optics , scattering , physics , roundness (object) , variation (astronomy) , materials science , astrophysics , psychology , social psychology , composite material
An investigation has been carried out into the possibilities of using polarisation methods to characterise clouds of irregular particles. Measurements were made at scattering angles around 160° in the backward direction, where it was expected that polarisation effects would be a maximum. It was found that there was no significant angular variation of any polarisation property and, as a consequence of reciprocity, the useful parameters were limited to the scattered intensities for two incident polarisation states and one cross‐polarised intensity. The only useful correlation appeared to be between cross‐polarisation and the “roundness” of the particles, although even this is dubious and in need of further exploration. The overall conclusion of the study is that the usefulness of polarisation to study clouds of randomly oriented particles may be limited.