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Not All Beams Are Created Equal

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Ra’ef, Mikhail, Edmund Optics

The first feature article in this series (“Selecting Industrial Laser Optics,” January 2014, pp. 11-13) discussed a variety of extracavity optical laser components and their importance to laser operation and laser beam delivery. This article will focus on using beam expanders to manipulate the cross-sectional area of a laser beam or beam size. "Focused as a laser beam" – what does that really mean? Whenever that statement is used, it’s related to the unique properties of a laser’s directionality and collimation, not focusability. Understanding your...Read full article

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    Jul 2014
    1. A bundle of light rays that may be parallel, converging or diverging. 2. A concentrated, unidirectional stream of particles. 3. A concentrated, unidirectional flow of electromagnetic waves.
    1. In optics, the bending of rays away from each other. 2. In lasers, the spreading of a laser beam with increased distance from the exit aperture. Also called beam spread. 3. In a binocular instrument, the horizontal angular disparity between the two lines of sight.
    The ratio of the size of the image of an object to that of the object. The ratio of the linear size of the image to that of the object is lateral magnification. Angular magnification is the ratio of the apparent angular size of the image observed through an optical device to that of the object viewed by the unaided eye. Longitudinal magnification is the ratio of the longitudinal or axial dimension of an image to the corresponding dimension of the object.
    An afocal optical device made up of lenses or mirrors, usually with a magnification greater than unity, that renders distant objects more distinct, by enlarging their images on the retina.
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