Optimization of Fresnel-zones-based Double Helix Point Spread Function and measurement of particle diffusion coefficient
Sign Up to like & getrecommendations! Published in 2022 at "Optics Communications"
DOI: 10.1016/j.optcom.2021.127411
Abstract: Abstract In the field of microscopic imaging, the double-helix point spread function (DH-PSF) based on the Fresnel zones is often used to locate the three-dimensional position of particles. The lower transfer function efficiency makes it… read more here.
Keywords: diffusion; fresnel; point spread; double helix ... See more keywords
Comment on “Computer simulation of Fresnel diffraction from rectangular apertures and obstacles using the Fresnel integrals approach”
Sign Up to like & getrecommendations! Published in 2020 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2019.105819
Abstract: Abstract The purpose of this comment is to correct the result of the diffracted intensity pattern derived from the application of Babinet’s principle to Fresnel diffraction from the rectangular obstacle reported by Abedin et al.… read more here.
Keywords: fresnel diffraction; comment computer; fresnel; diffraction rectangular ... See more keywords
Fluorescent sensing with Fresnel microlenses for optofluidic systems
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.56.5.057106
Abstract: Abstract. The concept of fluorescent sensing in a microchannel equipped with focusing light Fresnel lenses has been demonstrated. The concept employs a line or array of Fresnel lenses generating a line or array of focused… read more here.
Keywords: sensing fresnel; fresnel microlenses; optofluidic systems; microlenses optofluidic ... See more keywords
Design and fabrication of Si-HDPE hybrid Fresnel lenses for infrared imaging systems.
Sign Up to like & getrecommendations! Published in 2017 at "Optics express"
DOI: 10.1364/oe.25.001202
Abstract: In this work, novel hybrid Fresnel lenses for infrared (IR) optical applications were designed and fabricated. The Fresnel structures were replicated from an ultraprecision diamond-turned aluminum mold to an extremely thin layer (tens of microns)… read more here.
Keywords: fresnel lenses; design fabrication; hybrid fresnel; fresnel ... See more keywords
Electrically tunable binary phase Fresnel lens based on a dielectric elastomer actuator.
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DOI: 10.1364/oe.25.023801
Abstract: We propose and demonstrate an all-solid-state tunable binary phase Fresnel lens with electrically controllable focal length. The lens is composed of a binary phase Fresnel zone plate, a circular acrylic frame, and a dielectric elastomer… read more here.
Keywords: binary phase; fresnel; phase fresnel; tunable binary ... See more keywords
Structure of microprismatic Fresnel lenses for creating uniform focal images.
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DOI: 10.1364/oe.438590
Abstract: Flat Fresnel lenses are known to form a point image in the focal plane. However, several practical applications require transforming lens to concentrate a parallel light beam into a uniformly illuminated light circle. We previously… read more here.
Keywords: lenses creating; fresnel lenses; structure microprismatic; microprismatic fresnel ... See more keywords
High diopter spectacle using a flexible Fresnel lens with a combination of grooves.
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DOI: 10.1364/oe.470252
Abstract: In this study, the Fresnel lens was investigated as a potential candidate for vision correction in patients with myopia. A few previous studies have suggested this idea; however, Fresnel lenses are limited by their aesthetics… read more here.
Keywords: high diopter; fresnel lens; combination; diopter spectacle ... See more keywords
Polarization-insensitive liquid crystal Fresnel lens based on self-assembly polymer gravels and chiral dopant.
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DOI: 10.1364/oe.475210
Abstract: A polarization-insensitive liquid crystal (LC) Fresnel lens is developed with binary LC configurations of 90°-twisted nematic (TN) and vertically-aligned (VA) domains in the adjacent zones. A LC mixture comprised of nematic host, photopolymer and chiral… read more here.
Keywords: liquid crystal; fresnel lens; insensitive liquid; polarization insensitive ... See more keywords
Design, Manufacturing and Characterization of Linear Fresnel Reflector’s Facets
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DOI: 10.3390/en12142795
Abstract: This paper presents a procedure for making facetted mirrors to use in linear Fresnel reflectors, considering the design of the transversal geometry, materials, and structure configuration. Four different assemblies of the structure that supports and… read more here.
Keywords: fresnel reflector; manufacturing characterization; fresnel; characterization linear ... See more keywords