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Applied Optics

Applied Optics


  • Vol. 38, Iss. 11 — Apr. 10, 1999
  • pp: 2212–2215

Simple model for image-plane polychromatic speckle contrast

Jonathan M. Huntley  »View Author Affiliations

Applied Optics, Vol. 38, Issue 11, pp. 2212-2215 (1999)

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A simple geometrical model was developed for calculation of the contrast of a polychromatic image-plane speckle pattern from a source of light with high spatial coherence. It is based on counting the number of independent speckle patterns that contribute to a given point in the image plane. This results in a simple equation for the contrast as a function of imaging geometry; relative orientation of the projection direction, observation direction, and specimen normal; bandwidth of the light source; and surface roughness. Its validity was established by comparison with an exact solution: rms errors in the calculated contrast were only 0.033 over a wide range of parameter values likely to be encountered in practice.

© 1999 Optical Society of America

OCIS Codes
(110.6150) Imaging systems : Speckle imaging
(120.3940) Instrumentation, measurement, and metrology : Metrology
(290.5880) Scattering : Scattering, rough surfaces

Original Manuscript: May 21, 1998
Published: April 10, 1999

Jonathan M. Huntley, "Simple model for image-plane polychromatic speckle contrast," Appl. Opt. 38, 2212-2215 (1999)

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