Experimental scattering investigations and radiative transfer calculations of large arbitrarily shaped absorbing particles

Christian Sasse

doi:10.1117/12.162659

1 December 1993 Experimental scattering investigations and radiative transfer calculations of large arbitrarily shaped absorbing particles

Christian Sasse

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Proceedings Volume 1995, Optical Scattering: Applications, Measurement, and Theory II; (1993) https://doi.org/10.1117/12.162659
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Measured optical properties of large absorbing arbitrarily shaped particulates are compared to calculated optical properties of smooth homogeneous spheres. The particulates examined are spherical carbon particles with rough surface structure and oil shale. The results of measurements of phase functions of single particles at (lambda) equals 514.5 nm and hemispherical reflectance from 450 to 1959 nm are used in an inverse two-flux model to calculate the average albedo of a single particle. For carbon particles, ideal spheres show a higher forward scatter contribution than measured properties of rough spheres. Two types of oil shale particles with different optical properties but similar size and surface structure are investigated. Particle albedo and phase functions are compared, and the error of measuring the phase function at one wavelength is investigated. Results are also compared to isotropic scattering particles.

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Christian Sasse "Experimental scattering investigations and radiative transfer calculations of large arbitrarily shaped absorbing particles", Proc. SPIE 1995, Optical Scattering: Applications, Measurement, and Theory II, (1 December 1993); https://doi.org/10.1117/12.162659

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KEYWORDS

Particles

Scattering

Optical properties

Optical spheres

Carbon

Reflectivity

Light scattering

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