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Proceedings Paper

Helical apodizers for tunable hyper Gaussian masks
Author(s): J. Ojeda-Castañeda; Sergio Ledesma; Cristina M. Gómez-Sarabia
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Paper Abstract

We discuss an optical method for controlling the half-width of Gaussian like transmittance windows, by using a pair of absorption masks that have both radial and helical amplitude variations. For describing the radial part of the proposed masks, we employ amplitude transmittance profiles of the form T(ρ) = exp(- ρ s ). For s = 2, one has an amplitude transmittance that is proportional to a Gaussian function. A sub Gaussian mask is defined by a value of s < 2. And if s > 2, one has super Gaussian masks. Our discussion considers that any of these radially varying masks has also helical modulations. We show that by using a suitable pair of this type of masks, one can control the halfwidth of Gaussian like windows.

Paper Details

Date Published: 30 September 2013
PDF: 6 pages
Proc. SPIE 8842, Novel Optical Systems Design and Optimization XVI, 88420N (30 September 2013); doi: 10.1117/12.2022497
Show Author Affiliations
J. Ojeda-Castañeda, Univ. de Guanajuato (Mexico)
Sergio Ledesma, Univ. de Guanajuato (Mexico)
Cristina M. Gómez-Sarabia, Univ. de Guanajuato (Mexico)


Published in SPIE Proceedings Vol. 8842:
Novel Optical Systems Design and Optimization XVI
G. Groot Gregory; Arthur J. Davis, Editor(s)

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