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Proceedings Paper

Light scattering from binary optics
Author(s): Douglas W. Ricks; Ramesh Ajmera
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Paper Abstract

We have calculated the angle-resolved scattering from several phase only Fresnel zone plates (lenses) and Dammann gratings (beam splitters). We simulate manufacturing errors by random perturbations of the surface-relief pattern, and calculate the irradiance in the far-field by evaluating the Fresnel diffraction integral. Scattering from perturbations of the etch depth is found to be proportional to the square of the ratio of the perturbation divided by the wavelength. Random perturbations of the pattern edges in Fresnel zone plates causes more scattering with shorter wavelengths than with longer wavelengths, but in Dammann gratings this scattering is independent of wavelength. Scattering increases for either small apertures or small f-numbers; but does not depend on either the number of levels in a Fresnel zone plate, the pattern in a Dammann grating, or the form of the probability distribution function.

Paper Details

Date Published: 1 December 1991
PDF: 12 pages
Proc. SPIE 1555, Computer and Optically Generated Holographic Optics; 4th in a Series, (1 December 1991); doi: 10.1117/12.50624
Show Author Affiliations
Douglas W. Ricks, Naval Weapons Ctr. (United States)
Ramesh Ajmera, Naval Weapons Ctr. (United States)

Published in SPIE Proceedings Vol. 1555:
Computer and Optically Generated Holographic Optics; 4th in a Series
Ivan Cindrich; Sing H. Lee, Editor(s)

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