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objective tube

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  • Objective (optics) — Several objective lenses on a microscope. In an optical instrument, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image. Objectives can be single lenses or… …   Wikipedia

  • Tube Slider — Infobox VG |title = Tube Slider developer = NDCube publisher = NEC Interchannel designer = engine = version = released = Vgrelease|North America|NA|April 16, 2003 genre = Racing game modes = Single player, Multiplayer (1–4) ratings = ESRB: E… …   Wikipedia

  • Tube Challenge — The Tube Challenge is the accepted name for the Guinness World Record ( GWR ) for visiting all London Underground stations in the shortest time possible, of which there are currently [http://www.tfl.gov.uk/assets/downloads/Standard Tube… …   Wikipedia

  • Objective — In a microscope, the objective (also called the objective lens) is the lens nearest to the object being examined whereas the lens closest to the eye is termed the ocular (the eyepiece). The light microscope today is usually binocular (with one… …   Medical dictionary

  • Non-achromatic objective — A non achromatic objective is an objective lens which is not corrected for chromatic aberration. In telescopes they can a be pre 18th century simple single element objective lenses which were used before the invention of doublet achromatic lenses …   Wikipedia

  • microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …   Universalium

  • telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

  • Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… …   Wikipedia

  • Optical microscope — Microscope Uses Small sample observation Notable experiments Discovery of cells Inventor Hans Lippershey Zacharias Jans …   Wikipedia

  • Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …   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

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