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Multiple annular linear diffractive axicons |
JOSA A, Vol. 28, Issue 4, pp. 523-533 (2011)
http://dx.doi.org/10.1364/JOSAA.28.000523
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Abstract
We propose a chromatic analysis of multiple annular linear diffractive axicons. Large aperture axicons are optical devices providing achromatic nondiffracting beams, with an extended depth of focus, when illuminated by a white light source, due to chromatic foci superimposition. Annular apertures introduce chromatic foci separation, and because chromatic aberrations result in focal segment axial shifts, polychromatic imaging properties are partially lost. We investigate here various design parameters that can be used to achieve color splitting, filtering, and combining using these properties. In order to improve the low-power efficiency of a single annular axicon, we suggest a spatial multiplexing of concentric annular axicons with different sizes and periods we call multiple annular aperture diffractive axicons (MALDAs). These are chosen to maintain focal depths while enabling color imaging with sufficient diffraction efficiency. Illustrations are given for binary phase diffractive axicons, considering technical aspects such as grating design wavelength and phase dependence due to the grating thickness.
© 2011 Optical Society of America
OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1380) Diffraction and gratings : Binary optics
(050.1950) Diffraction and gratings : Diffraction gratings
(110.6760) Imaging systems : Talbot and self-imaging effects
ToC Category:
Diffraction and Gratings
History
Original Manuscript: November 24, 2010
Manuscript Accepted: December 27, 2010
Published: March 9, 2011
Citation
Emilie Bialic and Jean-Louis de Bougrenet de la Tocnaye, "Multiple annular linear diffractive axicons," J. Opt. Soc. Am. A 28, 523-533 (2011)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-28-4-523
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