A Faster Approximation of Forward Scattering by Gradient-index Particles
نویسندگان
چکیده
By means of geometrical optics we present an approximation algorithm with which to accelerate the computation of scattering intensity distribution within a forward angular range (0◦–60◦) for gradient-index particles illuminated by acollimated ted incident beam. The incident angle of the reflected light is derived from the scattering angle to improve the approximation precision. This method proves effective for transparent particles with size parameters larger than 75 but fails to give good approximation results at scattering angles at which refractive rays are absent. With the given index model, the geometrical optics approximation is effective only for forward small angles, typically less than 10◦ or so when the refractive index difference of a particle is greater than a certain value. DOI: 10.2529/PIERS061023013549
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