Optical implementation of multifocal programmable lens with single and multiple axes

Romero, Lenny A.; Millán, Marı́a S.; Pérez‐Cabré, Elisabet

doi:10.1088/1742-6596/274/1/012050

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…There are different ways of encoding multiple Fresnel lenses, (l 1 ,.., l n of different focal lengths f 1 ,.., f n ), in a single-phase distribution [14]. The transmittance of a single Fresnel sub-lens i with focal length f i is given by:…”

Section: Multifocal Lens In Coaxial Configurationmentioning

confidence: 99%

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Extended focal depth imaging using single and double peacock eye phase diffractive elements

et al. 2012

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The "peacock eye" phase diffractive element focuses an incident plane wave into a segment of the optical axis although it introduces certain amount of aberration. This paper evaluates the extended depth of focus imaging performance of the peacock eye phase diffractive element and explores some potential applications in ophthalmic optics. Two designs of the element are analyzed: a single peacock eye, which produces one focal segment along the axis, and a 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-based elements are compared with the performance of a multifocal lens in the image space through numerical simulations as well as optical experiments. In all the cases considered, we obtain the point spread function and the image of an extended object. The results are presented and discussed.

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Section: Multifocal Lens In Coaxial Configurationmentioning

confidence: 99%

“…that share the same optical axis [13]. It has three focal points coinciding with the extremes and the center of the required DOF segment [14]. For the sake of comparison, the phase codification of the resulting multifocal lens is the same as to that used for the PE.…”

Section: Introductionmentioning

confidence: 99%

Extended focal depth imaging using single and double peacock eye phase diffractive elements

et al. 2012

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“…We have examined the combination of diffractive lenses in one device [3,7]. In this stage we introduce four coding methods for merging the phase distributions of three Fresnel lenses, (f1, f2, f3), of different focal length into a single-phase distribution.…”

Section: Introductionmentioning

confidence: 99%

“…The latter consists of three phase diffractive lenses with the same axis that are spatially multiplexed. It has three focal points coinciding with the extremes and the center of the required depth of focus segment [7]. To test the optical performance of all the elements, we obtain the point-spread function (PSF), the modulation transfer function (MTF), and their evolution along the optical axis.…”

Section: Introductionmentioning

confidence: 99%

Programmable Diffractive Optical Elements with Applicability in Ophthalmic Optics

Romero¹,

Millán²

2017

Opt. Pura Apl.

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ABSTRACT:This paper presents results of the research related with the development of the doctoral thesis of Lenny Alexandra Romero Pérez. This work covers the design, the characterization and the analysis of several programmable diffractive optical elements (PDOEs) such as: Fresnel lenses, multifocal lenses, integrated combinations of phase-masks with lenses, and DOEs with extended depth of focus (EDOF) like the Light Sword optical element and the Peacock Eye. This has been pursued to address several problems of human vision, like myopia, hyperopia, astigmatism, and presbyopia, by means of the implementation of such DOEs on a Holoeye Liquid Crystal on Silicon HEO 1080P spatial light modulator. We have developed and implemented several algorithms for generating the necessary optical elements to compensate the different ametropies. Simulation and experimental results demonstrate that several of the considered DOEs have the sufficient imaging performance and thus the potential for compensating ametropies and presbyopia.Key words: extended depth of focus, diffractive optical elements; ophthalmic optics, visual optics, spatial light modulator. RESUMEN:Este trabajo presenta resultados de la investigación enmarcada en la tesis doctoral realizada por la doctora Lenny Alexandra Romero Pérez, la cual fue enfocada en el diseño, caracterización y análisis de diversos elementos ópticos difractivos programables (PDOEs por sus siglas en inglés) programables tales como: lentes de Fresnel, lentes multifocales, combinaciones integradas de máscaras de fase con lentes y elementos con capacidad de extender la profundidad de foco (EDOF del inglés, extended depth of focus), como los elementos difractivos llamados espada de luz y ojo de pavo. Esta tesis busca solventar por medio del uso de DOEs en un modulador espacial de luz diversos problemas de la visión humana, como la miopía, hipermetropía, astigmatismo y la presbicia. La implementación se llevó a cabo en un modulador Holoeye LCoS (del inglés Liquid Crystal on Silicon) de 1080P. Se han desarrollado e implementado distintos algoritmos para la generación de los elementos ópticos necesarios para la compensación de las ametropías. Los resultados obtenidos mediante pruebas de simulación y experimentación permiten contrastar las propiedades de los DOEs analizados y destacar aquellos que por su funcionalidad en la compensación de ametropías pueden alcanzar una mayor aplicabilidad. En este artículo presentamos los resultados más relevantes obtenidos en esta investigación.Palabras clave: elementos ópticos difractivos programables, profundidad de foco extendido, óptica oftálmica, óptica visual, modulador espacial de luz. REFERENCES AND LINKS / REFERENCIAS Y ENLACES[1] V. Laude, "Twisted-nematic liquid-crystal pixelated active lens," Opt. Commun. 153, 134-152, (1998 [10] J. Sochacki, S. Bara, Z. Jaroszewicz, and A. Kołodziejczyk, "Phase retardation of the uniform-intensity axilens," Opt. Lett. 17, 7-9, (1992).https://doi.org/10.1364/OL.17.000007[11] A. Kołodziejczyk, S. Bará, Z. Jaroszewicz...

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“…As for the TOD evaluation, the data shows a large standard deviation across different pulse compressor positions. However, the order of magnitude of the TOD can be extracted from the mean value relative to the reference measurements, which leads to a value of (31 ± 22) × 10 3 fs 3 and is therefore close to the encoded TOD of 30000 fs 3 .…”

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confidence: 99%

Compact Metasurface-Based Optical Pulse-Shaping Device

et al. 2023

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Dispersion is present in every optical setup and is often an undesired effect, especially in nonlinear-optical experiments where ultrashort laser pulses are needed. Typically, bulky pulse compressors consisting of gratings or prisms are used to address this issue by precompensating the dispersion of the optical components. However, these devices are only able to compensate for a part of the dispersion (second-order dispersion). Here, we present a compact pulse-shaping device that uses plasmonic metasurfaces to apply an arbitrarily designed spectral phase delay allowing for a full dispersion control. Furthermore, with specific phase encodings, this device can be used to temporally reshape the incident laser pulses into more complex pulse forms such as a double pulse. We verify the performance of our device by using an SHG-FROG measurement setup together with a retrieval algorithm to extract the dispersion that our device applies to an incident laser pulse.

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Optical implementation of multifocal programmable lens with single and multiple axes

Cited by 3 publications

References 8 publications

Extended focal depth imaging using single and double peacock eye phase diffractive elements

Extended focal depth imaging using single and double peacock eye phase diffractive elements

Programmable Diffractive Optical Elements with Applicability in Ophthalmic Optics

Compact Metasurface-Based Optical Pulse-Shaping Device

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