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Now imagine that, instead of cutting a glass sphere, we cut a glass cylinder.  We need to cut the cylinder with a plane parallel to its axis of rotation (that would be the longest axis).  We end with a lens that is flat on one side and curved on the other.  However, the curve of a cylindrical lens only goes in one direction.  Why is that important? Well, because when we illuminate a cylindrical lens, instead of the light focusing into a point it will focus into a line.  Not only that, if we rotate the cylindrical lens along the optical axis, the focused line will change its orientation.

2024721 — Revision of File:Illumination Entertainment logo.svg (https://upload ... File history. Click on a date/time to view the file as it ...

One of the main applications of cylindrical lenses is in ophthalmology, specifically, to correct astigmatic vision.  When a person presents astigmatic vision, it is usually the result of a corneal deformation. An astigmatic cornea will have different focal points at different axes. It is then possible to use a cylindrical lens to change the focal point of one of the axes to overlap the second one.

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by FK Kneubühl · 2005 — Laser emittieren monochromatische kohärente elektromagnetische Strahlung im riesigen Wellenlängenbereich, der von den Millimeterwellen via Licht bis zur ...

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This is a technique that is used to capture the  shape of a 3D object into a digital copy.  It is particularly useful in manufacturing, prototyping, landscaping, and architecture.  This scanning technique measures the deformation of a straight line created by a cylindrical lens when it is incident into a non-flat surface.  By using cameras and triangulation, it is possible to measure the changes in the shape of our laser line and therefore estimate the shape of the object that we are measuring.

Imagine a sphere made out of glass and let’s say we cut at any plane completely across the sphere.  Our end piece will be a spherical lens, with a flat surface and a curved surface.  If we were to illuminate the flat side with a light source, we will see that all of the light is focused to a single point some distance in front of the lens.  If we rotate a spherical lens, the position and shape of the focused light wouldn’t change.

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Abkürzung oder auch Abbreviatur wie der Begriff „BL„, bezeichnet eine verkürzte Darstellungsform eines längeren Wortes oder einer längeren Wortgruppe. Es ...

Optical spectrometers usually use a cylindrical lens in their design.  It is usually placed after a diffractive grating element to focus light into a single line that is incident to a linear photodetector.

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They are usually used in combination with acousto-optic deflectors, where the focal point of a variable lens (the acousto-optical elements) can change its position laterally without the use of movable parts.  The cylindrical lens corrects the image and helps focus the light spot onto the correct plane for laser scanning microscopy.

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Dec 29, 2017 — Spherical aberration (SA) is a dominant higher-order aberration in human eyes, that creates local refractive errors proportional to the square ...

traduction kollimiert dans le dictionnaire Allemand - Français de Reverso, voir aussi 'Koller, kollidieren, kompliziert, Kollekte', conjugaison, ...

This optical measurement refers to the shape of the lens, not its physical dimensions. A technical definition of lens size is the distance between the rear ...

202183 — Was ist ein Frachtbrief (BL)?. Laut Business Dictionary ist ein Konnossement: „Ein Dokument, das von einem Spediteur oder seinem Vertreter an ...

Ideally, light emitting from a laser should be a perfect circle; however, semiconductor laser present an elliptic beam profile.  So it is necessary to correct the beam profile so we can collimate the beam and couple it to an optical fiber.  We can correct such profile by placing a cylindrical lens with its main axis perpendicular to the fast axis of the laser beam.

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2022912 — Figure 1.8.7: Polarization by reflection. Unpolarized light has equal amounts of vertical and horizontal polarization. After interaction with a ...

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A simple lens has two spherical surfaces, the centers of curvature of the connector consists of an optical axis of the lens.