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Devil's lenses
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DOI：10.1364/OE.15.013858.png)
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摘要
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In this paper we present a new kind of kinoform lenses in which the phase distribution is characterized by the devil's staircase function. The focusing properties of these fractal DOEs coined devil's lenses (DLs) are analytically studied and compared with conventional Fresnel kinoform lenses. It is shown that under monochromatic illumination a DL give rise a single fractal focus that axially replicates the self-similarity of the lens. Under broadband illumination the superposition of the different monochromatic foci produces an increase in the depth of focus and also a strong reduction in the chromaticity variation along the optical axis. (c) 2007 Optical Society of America.
Keyword:
FRACTAL ZONE PLATES
FOCUSING PROPERTIES
LIQUID-CRYSTAL
DIFFRACTION
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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