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Planar rainbow refractometry
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DOI：10.1364/OL.444013.png)
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Rainbow refractometry has been used in the past to measure size and refractive index of spherical particles, typically droplets in a spray. In the present study, conventional optical configurations for point measurements or line measurements have been extended to allow also the particle position in a plane to be determined, and hence, the designation planar rainbow refractometry. However, this extension introduces challenges in accurately calibrating the 2D scattering angles with the image coordinates. This challenge has been met using a novel calibration method, employing a monodispersed droplet stream traversed through the measurement plane. Experiments confirm achievable horizontal and vertical position accuracies of 0.42 mm and 0.36 mm, respectively, and a refractive index uncertainty of 2 x 10(-4). (C) 2021 Optica Publishing Group
Keyword:
DROPLET SIZE
THERMOMETRY
VELOCITY
DOMAIN
期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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