作者:
Yamaguchi, IchirouRIKEN
Higashi Hisakata 3-4-32 Kiryu Gunma 3760053 Japan Gunma Univ
Higashi Hisakata 3-4-32 Kiryu Gunma 3760053 Japan
Digital simulations of specklepatterns are reported. Wavefront propagation and scattering by a diffusely reflecting surface is represented by a generalized Huygens principle for scalar light waves. The surface roughn...
详细信息
ISBN:
(纸本)9781510622982
Digital simulations of specklepatterns 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 specklepatterns illuminated by a multimode laser and multiple wavelength lasers incoherent superposition of the specklepatterns arising from superposition from various wavelengths or various source positions are calculated to investigate the effect of speckle suppression by addition of many specklepatterns.
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