The invention relates to a
light management device in a
monitoring system, in particular to a stroboscopic
light management device which comprises a synchronous
signal unit, a frequency multiplication unit and a trigger
control unit, wherein, the frequency multiplication unit receives a standard reference
signal sent from the synchronous
signal unit and outputs a frequency multiplication signal. When receiving a trigger signal, the trigger
control unit outputs a
control signal with a given pulse width according to the obtained frequency multiplication signal. By adopting a synchronization technique, the device of the invention ensures stroboscopic lights emitted by a
light source and a
shutter of a camera to be synchronous, so that all luminous power is exerted during the action period of the
shutter of the camera, while during the period of closing the
shutter of the camera, no lights is emitted or the lowest brightness is kept. In addition, frequency of a strobe is increased to 100Hz, therefore, no influence is imposed on human eyes, and the illumination intensity of backlighting parts does not need to be considered when the camera shoots backlighting pictures. The light supplementation of the backlighting parts is realized by an impulse
LED lamp and the shooting of backlighting objects moving at high speed can be realized.