Stroboscope
Stroboscope
Stroboscope (pronunciation: /ˈstrəʊbəskəʊp/) is a device used to make a cyclically moving object appear to be slow-moving, or stationary. It is derived from the Greek words "strobos" meaning "whirling" and "skopein" meaning "to look at".
History
The stroboscope concept was first introduced by Simon von Stampfer in Austria and Joseph Plateau in Belgium in 1832. The principle has been applied in the design of various instruments used in the sciences of biology, physiology, and psychology.
Function
The stroboscope operates by emitting a brief and intense flash of light. The duration of the flash is usually a few microseconds to a few milliseconds. This makes the object under observation appear to be stationary or moving slowly, which allows for detailed examination of the object in motion.
Types
There are two types of stroboscopes: mechanical and electronic. Mechanical stroboscopes use a rotating disc with slots or holes, through which the observer views the moving object. Electronic stroboscopes, on the other hand, use electric light, usually a gas-discharge lamp, that can be flashed on and off with electronic control.
Applications
Stroboscopes have a wide range of applications. They are used in industry for machine inspection, in medicine for studying vocal cord vibration and other cyclic physiological phenomena, and in the entertainment industry for creating visual effects.
Related Terms
- Tachometer: A device used to measure the speed of a rotating object.
- Phenakistoscope: A device that creates an illusion of motion.
- Zoetrope: A pre-film animation device that produces the illusion of motion by displaying a sequence of drawings or photographs.
External links
- Medical encyclopedia article on Stroboscope
- Wikipedia's article - Stroboscope
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