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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 9, Iss. 4 — Apr. 1, 1992
  • pp: 601–608

Differential geometric approach to atmospheric refraction

William C. Kropla and Waldemar H. Lehn  »View Author Affiliations


JOSA A, Vol. 9, Issue 4, pp. 601-608 (1992)
http://dx.doi.org/10.1364/JOSAA.9.000601


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Abstract

Differential geometric techniques are presented and used to model the optical properties of the atmosphere under conditions that produce superior mirages. Optical path length replaces the usual Euclidean metric as a distance-measuring function and is used to construct a surface on which the paths of light rays are geodesics. The geodesic equations are shown to be equivalent to the ray equation in the plane. A differential equation that relates the Gaussian curvature of the surface and the refractive index of the atmosphere is derived. This equation is solved for the cases in which the curvature vanishes or is constant. Illustrative examples based on observation demonstrate the use of geometric techniques in the analysis of mirage images.

© 1992 Optical Society of America

History
Original Manuscript: March 4, 1991
Revised Manuscript: October 28, 1991
Manuscript Accepted: October 29, 1991
Published: April 1, 1992

Citation
William C. Kropla and Waldemar H. Lehn, "Differential geometric approach to atmospheric refraction," J. Opt. Soc. Am. A 9, 601-608 (1992)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-9-4-601

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