Digital simulation of speckle patterns

Ichirou Yamaguchi

doi:10.1117/12.2318655

7 September 2018 Digital simulation of speckle patterns

Ichirou Yamaguchi

Proceedings Volume 10834, Speckle 2018: VII International Conference on Speckle Metrology; 1083409 (2018) https://doi.org/10.1117/12.2318655
Event: SPECKLE 2018: VII International Conference on Speckle Metrology, 2018, Janów Podlaski, Poland

Abstract

Digital simulations of speckle patterns are reported. Wavefront propagation and scattering by a diffusely reflecting surface is represented by a generalized Huygens principle for scalar light waves. The surface roughness is expressed by a set of random numbers that are uniformly distributed within variable range. No approximations for the propagation distances are employed between a point source and a surface point as well as between the surface point and an observation one. The 3-dimensionall intensity distributions in the diffraction field of the object that is illuminated by a spherical wave are calculated by adding many wavelets in complex amplitudes of the scattered waves at the observation point. The intensity distributions on the planes parallel and perpendicular to the object are calculated. For analyzing the speckle patterns illuminated by a multimode laser and multiple wavelength lasers incoherent superposition of the speckle patterns arising from superposition from various wavelengths or various source positions are calculated to investigate the effect of speckle suppression by addition of many speckle patterns.

Citation Download Citation

Ichirou Yamaguchi "Digital simulation of speckle patterns", Proc. SPIE 10834, Speckle 2018: VII International Conference on Speckle Metrology, 1083409 (7 September 2018); https://doi.org/10.1117/12.2318655

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