Formation of speckle images formed for diffusers illuminated by modulated apertures (circular obstruction)
Hamed, Abdallah;
Abstract
An amplitude modulation of the circular aperture is used for the illumination of a numerical object having a
randomly distributed function. In this study, a central obstruction for the aperture is assumed. The modulated
speckle image is obtained using the MATLAB program and compared with that obtained in the case of a uniform circular aperture for illumination. We have considered coherent illumination obtained from a laser
beam in order to facilitate the computation of the Fourier transform of the defined computed speckle intensity
corresponding to this novel aperture. Finally, the autocorrelation function of the randomly distributed object is
calculated in all cases.
randomly distributed function. In this study, a central obstruction for the aperture is assumed. The modulated
speckle image is obtained using the MATLAB program and compared with that obtained in the case of a uniform circular aperture for illumination. We have considered coherent illumination obtained from a laser
beam in order to facilitate the computation of the Fourier transform of the defined computed speckle intensity
corresponding to this novel aperture. Finally, the autocorrelation function of the randomly distributed object is
calculated in all cases.
Other data
| Title | Formation of speckle images formed for diffusers illuminated by modulated apertures (circular obstruction) | Authors | Hamed, Abdallah | Keywords | numerical diffusers;numerical speckle images;autocorrelation intensity of the diffusers | Issue Date | 6-Jan-2010 | Publisher | Taylor & Francis | Journal | Journal of Modern Optics, | Volume | 56 | Issue | 15 | Start page | 1633 | End page | 1642 | DOI | http://dx.doi.org/10.1080/09500340903277792 |
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