Patent ID: 7729220

Claim:
A system for adjusting a tilt angle of a light beam emitted by an optical pickup unit, the system comprising: a storage unit for storing test parameters, the test parameters being used for adjusting the tilt angle of the light beam to compensate a first angle between a moving path of the optical pickup unit and an ideal glass plate; an input unit for receiving focusing error signals, the focusing error signals being generated based on the light beam that is adjusted according to the test parameters and reflected from an optical disc; a signal-processing unit for processing the focusing error signals and generating current parameters based on the focusing error signals; a calculating unit for calculating middle parameters based on the test parameters and the current parameters; an iteration unit for generating target parameters based on the middle parameters, a number of the target parameters being greater than that of the current parameters; a memory for storing the current parameters and the target parameters; and an output unit for outputting the target parameters, the target parameters being used for adjusting the tilt angle of the light beam to compensate a second angle between the moving path of the optical pickup unit and the optical disc.