Search results for "Focal volume"

showing 4 items of 4 documents

A virtual laboratory designed for teaching diffractive lenses

2010

[EN] We present a virtual laboratory generated in Matlab GuiQc (Graphical User Interface) for its use in Optics courses as an informatic tool for teaching the focusing properties of a diffractive lens. This Gui allows the students to learn easily and rapidly about the influence on the focal volume of the lens construction parameters. As an example in this work we analyze fractal diffractive lenses because we found that fractal geometry is a highly motivating topic for students since it is related to a wide range of scientific and technological phenomena.

Focal volumeEngineeringbusiness.industryOpticslcsh:Education (General)law.inventionLens (optics)MatlabQcFractalsDiffractive lensFractallawComputer graphics (images)Virtual Laboratorylcsh:L7-991businessMATLABcomputerEducational SoftwareGraphical user interfacecomputer.programming_languageModelling in Science Education and Learning
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Volumetric multiple optical traps produced by Devil's lenses

2010

We propose the use of a new diffractive optical element coined Devil's Vortex-Lens (DVL) to produce optical tweezers. In its more general form it results as the combination of a Devil’s lens and a helical vortex phase mask. It is shown that under monochromatic illumination a DVL generates a focal volume with several concatenated doughnut modes that are axially distributed according to the self-similarity of the lens. The orbital angular momentum associated to each link in the chain is investigated.

Focal volumePhysicsAngular momentumbusiness.industryPhysics::OpticsAtomic and Molecular Physics and Opticslaw.inventionVortexLens (optics)OpticsOptical tweezerslawMonochromatic colorAxial symmetrybusinessOptical vortexJournal of the European Optical Society: Rapid Publications
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An experiment to study the structure of the focal volume in apertured focusing systems

2001

We present a simple experiment, specifically designed for students of undergraduate optics courses, where the influence of an aperture stop position on the three-dimensional structure of the focal volume of focusing systems is studied. The experiment, which involves only simple optical elements, permits an undergraduate student to generate different focal structures by simply axially displacing the aperture stop.

Focal volumePhysicsOpticsPosition (vector)Simple (abstract algebra)business.industryAstrophysics::Instrumentation and Methods for AstrophysicsStructure (category theory)Undergraduate studentPhysics::Physics EducationGeneral Physics and AstronomyAxial symmetrybusinessEuropean Journal of Physics
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Fractal square zone plates

2013

[EN] In this paper we present a novel family of zone plates with a fractal distribution of square zones. The focusing properties of these fractal diffractive lenses coined fractal square zone plates are analytically studied and the influence of the fractality is investigated. It is shown that under monochromatic illumination a fractal square zone plate gives rise a focal volume containing a delimited sequence of two-arms-cross pattern that are axially distributed according to the self-similarity of the lens.

PhysicsFocal volumebusiness.industryDiffractive lensZone plateAtomic and Molecular Physics and OpticsSquare (algebra)Electronic Optical and Magnetic Materialslaw.inventionLens (optics)Zone platesFractalsDistribution (mathematics)OpticsFractallawFISICA APLICADAMonochromatic colorElectrical and Electronic EngineeringPhysical and Theoretical ChemistryMATEMATICA APLICADAbusinessAxial symmetryDiffractionOptics Communications
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