stroboscope係咩呢架??

stroboscope=頻閃觀測器(觀察急速旋轉或振動物體的裝置);頻閃儀
頻閃儀又稱計數器或頻閃靜像儀該設備是根據閃光頻率與運動物體的圖案同步時，人眼視覺暫留而產生的相對靜止的原理製成的。能夠很直觀地觀看被照運動圖案，不會造成任何色彩失真。該儀器採用高性能的單片機為處理單元，通過數位管實時地顯示每分鐘的閃光次數及工作狀態。本產品適應用於塑膠軟包裝及煙草行業水松紙及煙標等的印刷機、檢品機或復卷分切機等設備上的產品品質檢測,也可適用於高速運轉設備的檢修。
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 parts and vibrating strings are common examples.
In its simplest form, a rotating disc with evenly-spaced holes is placed in the line of sight between the observer and the moving object. The rotational speed of the disc is adjusted so that it becomes synchronised with the movement of the observed system, which seems to slow and stop. The illusion is caused by temporal aliasing, commonly known as the 'stroboscopic effect'.
In electronic versions, the perforated disc is replaced by a lamp capable of emitting brief and rapid flashes of light. The frequency of the flash is adjusted so that it is a unit fraction of the object's cyclic speed, at which point the object is seen to be stationary.

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 parts and vibrating strings are common examples.

In its simplest form, a rotating disc with evenly-spaced holes is placed in the line of sight between the observer and the moving object. The rotational speed of the disc is adjusted so that it becomes synchronised with the movement of the observed system, which seems to slow and stop. The illusion is caused by temporal aliasing, commonly known as the 'stroboscopic effect'.

In electronic versions, the perforated disc is replaced by a lamp capable of emitting brief and rapid flashes of light. The frequency of the flash is adjusted so that it is a unit fraction of the object's cyclic speed, at which point the object is seen to be stationary.

Stroboscopes play an important role in the study of stresses on machinery in motion, and in many other forms of research. They are also used as measuring instruments for determining cyclic speed.

As a timing light they are used to set the ignition timing of internal combustion engines.

In medicine, stroboscopes are used to view the vocal cords for diagnosis. The patient hums or speaks into a microphone which in turn activates the stroboscope at either the same or a slightly different frequency. The light source and a camera are positioned by endoscopy.

Another application of the stroboscope can be seen on many gramophone turntables. The edge of the platter has marks at specific intervals so that when viewed by incandescent lighting powered at mains frequency, and provided the platter is rotating at the correct speed, the marks appear to be stationary.

Flashing lamp strobes are also adapted for popular use, as a lighting effect for discotheques and night clubs where they give the impression of dancing in slow motion.