1993•American Journal of PhysicsRequires access

Diffraction of a Gaussian beam by a spherical obstacle

James A. Lock, Edward A. Hovenac

Abstract

The Kirchhoff integral for diffraction in the near-forward direction is derived from the exact solution of the electromagnetic boundary value problem of a focused Gaussian laser beam incident on a spherical particle. The diffracted intensity in the vicinity of the particle is computed and the way in which the features of the diffraction pattern depend on the width of the Gaussian beam is commented on.

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Key concepts: Diffraction, Physics, Gaussian beam, Optics, Gaussian, Beam (structure), Laser beam quality, Laser