Cascaded mirror array and scanning system thereof

A cascaded mirror array scanner system for scanning a light beam, the system comprising:

• a plurality of reflector units, each of the reflector units comprising:
• an array reflector;
• a support structure supporting the array reflector while allowing the array reflector to move and change angular position;
• a position limiting structure that limits the movement of the array reflector so that the array reflector is positioned at a finite number of predetermined angular positions;
• and
• a control and driving device electrically connected to the plurality of the reflector units for driving the movement of each of the reflector units respectively,
• wherein the control and driving device causes the movement of each of the array reflectors but does not conduct precision control of the angle of the array reflector electrically while the position limiting structure and the support structure in each of the reflector units restrict the movement and mechanically digitize the angular position of the corresponding array reflector to the finite number of predetermined angular positions, and
• wherein the light beam is directed to pass by and be reflected by each of the array reflectors in a sequential order and thereby is deflected by an overall scan angle equal to a combination of deflection angles at all of the array reflectors.