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Advances in Optical Technologies
Volume 2010 (2010), Article ID 613728, 7 pages
Research Article

Spectral Modification by Diffraction and Scattering

1Physics Department, University of Tehran, 14395-547 Tehran, Iran
2Department of Physics, Shahid Beheshti University, Evin, 1983963113 Tehran, Iran
3Physics Department, Bu-Ali Sina University, 65178 Hamedan, Iran

Received 1 December 2009; Accepted 2 March 2010

Academic Editor: Oleg V. Angelsky

Copyright © 2010 M. Taghi Tavassoly et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Different effects induce spectral changes, for example, correlation of source fluctuations, propagation of light, random changes in optical properties of a medium, diffraction and scattering from objects, and rough interfaces. We review the spectral changes that occur as a result of light diffraction from phase steps, and particularly we discuss the spectral changes in the neighborhood of phase singularities. We also review the redshift and blueshift in the spectra of the lights coherently and diffusely scattered from rough interfaces. In addition, we study the effects of roughness and incident angle on the spectral profiles of scattered lights in reflection and transmission modes.