stroboscope /ˈstrəʊbəˌskəʊp/

• 1. 

  N an instrument producing a flashing light, the frequency of which can be synchronized with some multiple of the frequency of rotation, vibration, or operation of an object, etc, making it appear stationary. It is used to determine speeds of rotation or vibration, or to adjust objects or parts 频闪观测仪 (Sometimes shortened to strobe)