Laser direct imaging system and DMD working area adjusting method

The invention provides a laser direct imaging system and a DMD working area adjusting method, and belongs to the field of laser direct imaging, and the system comprises a laser, a collimating lens group, a front reflector group, a main reflector group, a position-adjustable DMD group and an imaging lens group. The working area of the adjustable DMD group is continuously adjustable or the multi-gear area is adjustable; the position-adjustable DMD group comprises a fixed bottom plate, a position adjusting module, a DMD carrier plate and a DMD body; the DMD carrier plate is adjustably arranged relative to the position of the fixed bottom plate through the position adjusting module; according to the scheme, the working area of the DMD can be adjusted, the full-breadth micromirror of the DMD is fully used, and the service life of the DMD is prolonged; the method can switch quickly and accurately, does not need to damage the debugging state of equipment, saves manpower and time, and can be popularized and applied i