Open AccessLow-angle optical vortex coronagraphic scatterometer
Author(s) -
Lingyu Wan,
Garreth Ruane,
Grover A. Swartzlander
Publication year - 2016
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.41.004915
Subject(s) - optics , physics , scatterometer , scattering , forward scatter , optical vortex , mie scattering , vortex , optical telescope , coronagraph , signal (programming language) , light scattering , stars , exoplanet , astronomy , telescope , beam (structure) , satellite , computer science , thermodynamics , programming language
The important, but difficult-to-measure zero and low-angle scattering spectrum, as well as the broader angular spectrum, was obtained by use of an optical vortex coronagraphic scatterometer (patent pending). The experimental measurements agreed well with the predictions from the Mie scattering theory. High contrast discrimination allowed us to remove the unscattered coherent illumination, revealing a low-angle superimposed scattered signal.