Devising a lab-built point visibility meter

Nathaniel A. Ferlic; Miranda van Iersel; Christopher C. Davis

doi:10.1117/12.2529838

6 September 2019 Devising a lab-built point visibility meter

Nathaniel A. Ferlic, Miranda van Iersel, Christopher C. Davis

Proceedings Volume 11133, Laser Communication and Propagation through the Atmosphere and Oceans VIII; 111330B (2019) https://doi.org/10.1117/12.2529838
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

Atmospheric aerosols, containing water, constitute most of the air during non-ideal weather conditions including fog, haze, and mist, and are present in a lower volume density during ideal weather conditions. These aerosols cause light to be attenuated while propagating through the atmosphere, which can be described by Lambert-Beer’s law. The extinction coefficient is dependent on the cross-sectional geometry of the scattering volume which can be found using Mie theory. In the case of a real environment a distribution of particle sizes must be considered where the particles present are described by a weighted value relative to the number density and distribution function of particle radii chosen. We have built a point visibility meter, which measures the amount of scattered light at a specific forward scattering angle under the assumption that the scattered light is linearly related to the extinction coefficient of different weather conditions. To validate our design, it will be compared against a commercial visibility meter.

Citation Download Citation

Nathaniel A. Ferlic, Miranda van Iersel, and Christopher C. Davis "Devising a lab-built point visibility meter", Proc. SPIE 11133, Laser Communication and Propagation through the Atmosphere and Oceans VIII, 111330B (6 September 2019); https://doi.org/10.1117/12.2529838

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