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Phase function measurements on nonspherical scatterers using a two-axis goniometer.

Florian Klaus Forster·Alwin Kienle·Rene Michels·Raimund Hibst
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Abstract

We present a two-axis goniometer for measuring the phase function of scattering media with an angular resolution of about 0.2 deg having 12 decades of dynamic range and covering almost the full solid angle. The setup is evaluated with polystyrene spheres and with perpendicularly and obliquely illuminated thin glass cylinders. The scattering pattern and its intensity distribution are in excellent agreement with analytical theory. A multiple scattering configuration composed of two parallel cylinders is also examined. Finally, the phase function of dentin slabs is measured and its dependence on the dental microstructure is discussed.

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AlgorithmsComputer SimulationDentinHumansLightModels, BiologicalNephelometry and TurbidimetryPhantoms, ImagingRefractometryScattering, RadiationEvaluation StudyJournal ArticleResearch Support, Non-U.S. Gov't

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Florian Klaus Forster, Alwin Kienle, Rene Michels, Raimund Hibst. Phase function measurements on nonspherical scatterers using a two-axis goniometer.. https://doi.org/10.1117/1.2187421

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