التفاصيل البيبلوغرافية
| العنوان: |
Study of the diffraction pattern of cloud particles and the respective responses of optical array probes. |
| المؤلفون: |
Vaillant de Guélis, Thibault, Schwarzenböck, Alfons, Shcherbakov, Valery, Gourbeyre, Christophe, Laurent, Bastien, Dupuy, Régis, Coutris, Pierre, Duroure, Christophe |
| المصدر: |
Atmospheric Measurement Techniques; 2019, Vol. 12 Issue 4, p2513-2529, 17p |
| مصطلحات موضوعية: |
DIFFRACTION patterns, OPTICAL diffraction, PARTICLES, OPTICAL devices, GLASS fibers, DIFFRACTIVE scattering |
| مستخلص: |
Optical array probes (OAPs) are classical instrumental means to derive shape, size, and number concentration of cloud and precipitation particles from 2-D images. However, recorded 2-D images are subject to distortion based on the diffraction of light when particles are imaged out of the object plane of the optical device. This phenomenon highly affects retrievals of microphysical properties of cloud particles. Previous studies of this effect mainly focused on spherical droplets. In this study we propose a theoretical method to compute diffraction patterns of all kinds of cloud particle shapes in order to simulate the response recorded by an OAP. To check the validity of this method, a series of experimental measurements have been performed with a 2D-S probe mounted on a test bench. Measurements are performed using spinning glass discs with imprinted non-circular opaque particle shapes. [ABSTRACT FROM AUTHOR] |
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