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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 33, Iss. 21 — Jul. 20, 1994
  • pp: 4697–4701

Hyperbolic umbilic and E6 diffraction catastrophes associated with the secondary rainbow of oblate water drops: observations with laser illumination

Gregory Kaduchak and Philip L. Marston  »View Author Affiliations


Applied Optics, Vol. 33, Issue 21, pp. 4697-4701 (1994)
http://dx.doi.org/10.1364/AO.33.004697


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Abstract

Previous observations of oblate drops of water illuminated perpendicular to their axis of symmetry exhibit catastrophe patterns near the primary-rainbow scattering angle [see, e.g., Appl. Opt. 30, 3468 (1991). The present research concerns observation of diffraction catastrophes near the secondary-rainbow scattering angle under similar experimental conditions. Illumination with laser light exhibits similar caustic structures in the secondary rainbow including the hyperbolic umbilic focal section and the E6 or symbolic umbilic focal section. The range of drop aspect ratios explored includes aspect ratios as small as those found for freely falling drops in air as well as highly flattened drops. The new features of the secondary rainbow occur for highly flattened drops.

© 1994 Optical Society of America

History
Original Manuscript: October 14, 1993
Revised Manuscript: December 14, 1993
Published: July 20, 1994

Citation
Gregory Kaduchak and Philip L. Marston, "Hyperbolic umbilic and E6 diffraction catastrophes associated with the secondary rainbow of oblate water drops: observations with laser illumination," Appl. Opt. 33, 4697-4701 (1994)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-33-21-4697

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