stroboscope


stroboscope
stroboscopic /stroh'beuh skop"ik, strob'euh-/, stroboscopical, adj.stroboscopy /streuh bos"keuh pee/, n.
/stroh"beuh skohp', strob"euh-/, n.
1. a device for studying the motion of a body, esp. a body in rapid revolution or vibration, by making the motion appear to slow down or stop, as by periodically illuminating the body or viewing it through widely spaced openings in a revolving disk.
2. Photog.
a. Also called strobe, strobe light, stroboscopic lamp. a lamp capable of producing an extremely short, brilliant burst of light, for synchronization with a camera having a high shutter speed, in order to photograph a rapidly moving object, as a bullet, for such a short duration that it will appear to be standing still.
b. the device and equipment for holding and firing such a lamp.
3. such a lamp used for creating special lighting effects, as in a theater or discotheque or at a rock concert.
[1830-40; < Gk stróbo(s) action of whirling + -SCOPE]

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Instrument that repeatedly illuminates a rotating or vibrating object in order to study the motion of the object or to determine its rotation speed or vibration frequency.

The effect is achieved by producing light in very short bursts timed to occur when the moving part is in the same phase of its motion. By use of the stroboscope, a machine part, for example, may be made to appear to slow down or stop.

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▪ electronic device
      instrument that provides intermittent illumination of a rotating or vibrating object in order to study the motion of the object or to determine its rotary speed or vibration frequency. A machine part, for example, may be made to appear to slow down or stop; the effect is achieved by producing illumination in very short, brilliant bursts that always occur when the moving part is in the same phase of its motion.

      Early stroboscopic devices utilized either intermittent vision or interrupted light; in both cases a spinning or oscillating disk with a narrow radial slot either allowed the object to be viewed at regular intervals or permitted light to illuminate it at successive instants, thus exposing it at precisely the times it reached a given point in its motion.

      The modern electronic stroboscope employs a gas-filled discharge lamp to produce very short, repetitive, brilliant flashes of light. Typically, a flash duration of about one microsecond (0.000001 second) and flashing rates ranging from 110 to 150,000 per minute are achieved. Using special techniques, flashing rates of more than 500,000 per minute have been obtained.

      The brilliant short-duration flash produced by a stroboscope is admirably suited for photographing rapidly moving objects. Single flashes with durations of one millionth of a second can be used in such photography, while for ordinary photography, flash durations of one thousandth of a second are common.

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Universalium. 2010.

Look at other dictionaries:

  • stroboscope — [ strɔbɔskɔp ] n. m. • 1866; de strobo et scope 1 ♦ Anciennt Appareil rotatif (disque, cylindre) donnant l illusion du mouvement par une suite d images fixes. Le stroboscope, ancêtre du cinéma, des dessins animés. 2 ♦ Phys. Instrument qui émet de …   Encyclopédie Universelle

  • Stroboscope — Strob o*scope, n. [Gr. ? a whirling + scope.] 1. An instrument for studying or observing the successive phases of a periodic or varying motion by means of light which is periodically interrupted. [1913 Webster] 2. An optical toy similar to the… …   The Collaborative International Dictionary of English

  • stroboscope — ► NOUN Physics ▪ an instrument which shines a bright light at rapid intervals so that a moving or rotating object appears stationary. DERIVATIVES stroboscopic adjective. ORIGIN from Greek strobos whirling …   English terms dictionary

  • stroboscope — [strō′bə skōp΄; ] occas. [ sträb′əskōp] n. [< Gr strobos, a twisting around (for IE base see STROPHE) + SCOPE] 1. an instrument for studying periodic or varying motion; specif., a device using a strobe light to illuminate a moving body,… …   English World dictionary

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  • Stroboscope — A stroboscope, also known as a strobe, is an instrument used to make a cyclically moving object appear to be slow moving, or stationary. The principle is used for the study of rotating, reciprocating, oscillating or vibrating objects. Machine… …   Wikipedia

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  • stroboscope — noun Etymology: Greek strobos whirling + International Scientific Vocabulary scope Date: 1896 an instrument for determining the speed of cyclic motion (as rotation or vibration) that causes the motion to appear slowed or stopped: as a. a… …   New Collegiate Dictionary

  • stroboscope — noun a) Instrument for studying or observing periodic movement by rendering a moving body visible only at regular intervals. b) A lamp that produces short bursts of light that synchronizes with a camera shutter for photographing fast moving… …   Wiktionary