Digital imaging device capable of recording ultrafast process and method thereof

The invention relates to the digital imaging technology, especially relates to a digital imaging device capable of recording an ultrafast process and a method thereof. In order to solve the problems of the prior art, the invention provides a digital imaging device and a method thereof. Under the precondition of realizing the 105 fps-107fps high imaging frequency, tens to hundreds of high-quality digital images can be acquired by one operation, and are suitable for the experiments and the researches of the explosion mechanics, the shock wave physics, and the fluid dynamics. The above mentioned method is characterized in that a signal control unit is used to transmit driving signals to a rotating mirror driving unit; and at the same time, whether a rotating mirror signal output by a pneumatic rotating mirror of an imaging unit reaches a preset value can be detected by a rotating mirror signal processing unit; when the rotating mirror signal output by the imaging unit reaches the preset value, the signal control