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Optics Letters

Optics Letters


  • Vol. 30, Iss. 6 — Mar. 15, 2005
  • pp: 658–660

Generalization of the rainbow Airy theory to nonuniform spheres

Maria Rosaria Vetrano, Jeronimus Petrus Antonius Johannes van Beeck, and Michel Léon Riethmuller  »View Author Affiliations

Optics Letters, Vol. 30, Issue 6, pp. 658-660 (2005)

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Rainbow techniques permit measurement of refractive indices, and hence the temperatures of liquid droplets through determination of the absolute angular position of a rainbow interference image in space. The Airy theory, which is commonly used to explain the rainbow effect, permits the determination of a unique refractive-index value, even in the presence of nonuniformities in the droplet. An extension of this theory to spheres that exhibit internal refractive-index gradients is proposed. The case of burning droplets is considered as an example of such spheres, and the results obtained are successfully compared with those presented in the literature.

© 2005 Optical Society of America

OCIS Codes
(080.2710) Geometric optics : Inhomogeneous optical media
(290.0290) Scattering : Scattering

Maria Rosaria Vetrano, Jeronimus Petrus Antonius Johannes van Beeck, and Michel Léon Riethmuller, "Generalization of the rainbow Airy theory to nonuniform spheres," Opt. Lett. 30, 658-660 (2005)

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