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beam half width

См. также в других словарях:

  • Beam diameter — The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be obtained in many… …   Wikipedia

  • beam width — The full angular interval in the horizontal plane between the points at which the power radiated from the antenna has fallen to half its maximum value. In practice, the effective beam width may be less than this value and may be altered by use of …   Aviation dictionary

  • Beam parameter product — In laser science, the beam parameter product (BPP) is the product of a laser beam s divergence angle (half angle) and the radius of the beam at its narrowest point (the beam waist).cite web|url=http://www.rp photonics.com/beam parameter… …   Wikipedia

  • beam width — The angle between the directions, on either side of the axis, at which the intensity of the radio frequency field drops to one half the value it has on the axis …   Military dictionary

  • Laser beam profiler — A laser beam profiler captures, displays, and records the spatial intensity profile of a laser beam at a particular plane transverse to the beam propagation path. Since there are many types of lasers ultraviolet, visible, infrared, continuous… …   Wikipedia

  • Electron beam welding — (EBW) is a fusion welding process in which a beam of high velocity electrons is applied to the materials being joined. The workpieces melt as the kinetic energy of the electrons is transformed into heat upon impact, and the filler metal, if used …   Wikipedia

  • Glossary of nautical terms — This is a glossary of nautical terms; some remain current, many date from the 17th 19th century. See also Wiktionary s nautical terms, Category:Nautical terms, and Nautical metaphors in English. Contents: A B C D E F G H I J K L M N O P Q R …   Wikipedia

  • optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …   Universalium

  • 35 mm film — is the basic film gauge most commonly used for both still photography and motion pictures, and remains relatively unchanged since its introduction in 1892 by William Dickson and Thomas Edison, using film stock supplied by George Eastman. The… …   Wikipedia

  • yacht — yachty, adj. /yot/, n. 1. a vessel used for private cruising, racing, or other noncommercial purposes. v.i. 2. to sail, voyage, or race in a yacht. [1550 60; < early D jaght, short for jaghtschip hunting ship, equiv. to D jacht hunt (deriv. of… …   Universalium

  • Johan Sebastiaan Ploem — Infobox Scientist name = Johan Sebastiaan Ploem image width = 200px birth date = birth date and age|1927|08|25 birth place = Sumatra, Indonesia nationality = Dutch field = Advanced Microscopy; Molecular Diagnostics; Digital Painting work… …   Wikipedia

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