Double peacock eye optical element for extended focal depth imaging with ophthalmic applications

PLUTO / PLUTO-2 Spatial Light Modulators
Microscopy
Published on:
Authors: Lenny A. Romero, María S. Millán, Zbigniew Jaroszewicz, Andrzej Kolodziejczyk.
Abstract:

“The aged human eye is commonly affected by presbyopia, and therefore, it gradually loses its capability to form images of objects placed at different distances. Extended depth of focus (EDOF) imaging elements can overcome this inability, despite the introduction of a certain amount of aberration. This paper evaluates the EDOF imaging performance of the so-called peacock eye phase diffractive element, which focuses an incident plane wave into a segment of the optical axis and explores the element’s potential use for ophthalmic presbyopia compensation optics. Two designs of the element are analyzed: the single peacock eye, which produces one focal segment along the axis, and the double peacock eye, which is a spatially multiplexed element that produces two focal segments with partial overlapping along the axis. The performances of the peacock eye elements are compared with those of multifocal lenses through numerical simulations as well as optical experiments in the image space. The results demonstrate that the peacock eye elements form sharper images along the focal segment than the multifocal lenses and, therefore, are more suitable for presbyopia compensation. The extreme points of the depth of field in the object space, which represent the remote and the near object points, have been experimentally obtained for both the single and the double peacock eye optical elements. The double peacock eye element has better imaging quality for relatively short and intermediate distances than the single peacock eye, whereas the latter seems better for far distance vision.”

Open Access

Publication: Journal of Biomedical Optics
Issue/Year: J. Biomed. Opt. , Vol. 17, Issue 4, 046013 (April 2012)
DOI: 10.1117/1.JBO.17.4.046013
Link: https://doi.org/10.1117/1.JBO.17.4.046013

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