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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 21, Iss. 23 — Dec. 1, 1982
  • pp: 4339–4344

Lower and upper bounds on extinction cross sections of arbitrarily shaped strongly absorbing or strongly reflecting nonspherical particles

Petr Chýlek and V. Ramaswamy  »View Author Affiliations


Applied Optics, Vol. 21, Issue 23, pp. 4339-4344 (1982)
http://dx.doi.org/10.1364/AO.21.004339


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Abstract

The general belief that the sphere of equal volume provides a better approximation for the extinction cross section of a nonspherical particle than a sphere of equal surface area at small values of the size parameters is not correct. At some values of x, the equal volume sphere is a better approximation; at others, the equal surface area sphere is better. Details depend on the shape, size, and refractive index. For strongly absorbing particles at x > π, the extinction cross section of an equal volume sphere σEV provides the lower bound, and σEVSN/SEV (where SN is the surface area of considered nonspherical particle, and SEV is the surface area of equal volume sphere) provides the upper bound on the extinction cross section of an arbitrarily shaped nonspherical particle.

© 1982 Optical Society of America

History
Original Manuscript: August 5, 1982
Published: December 1, 1982

Citation
Petr Chýlek and V. Ramaswamy, "Lower and upper bounds on extinction cross sections of arbitrarily shaped strongly absorbing or strongly reflecting nonspherical particles," Appl. Opt. 21, 4339-4344 (1982)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-21-23-4339

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