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Optics Letters

Optics Letters

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  • Vol. 24, Iss. 23 — Dec. 1, 1999
  • pp: 1696–1698

Global rainbow thermometry for droplet-temperature measurement

J. P. A. J. van Beeck, D. Giannoulis, L. Zimmer, and M. L. Riethmuller  »View Author Affiliations


Optics Letters, Vol. 24, Issue 23, pp. 1696-1698 (1999)
http://dx.doi.org/10.1364/OL.24.001696


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Abstract

Standard rainbow thermometry connects the scattering angle of the main rainbow maximum, generated by a single droplet, to the droplet’s refractive index and thus to its temperature. Droplet nonsphericity influences the rainbow position and therefore degrades the quality of the droplet-temperature measurement. We propose global rainbow thermometry, which measures the average rainbow position that is created by multiple droplets and from which a mean temperature can be derived. The new technique aims at eliminating the nonsphericity effect. The principle of this method is presented, and a typical recorded image is discussed.

© 1999 Optical Society of America

OCIS Codes
(290.3030) Scattering : Index measurements
(290.4210) Scattering : Multiple scattering

Citation
J. P. A. J. van Beeck, D. Giannoulis, L. Zimmer, and M. L. Riethmuller, "Global rainbow thermometry for droplet-temperature measurement," Opt. Lett. 24, 1696-1698 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-23-1696

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