Patent ID: 8000186

Claim:
An optical system with enhanced initializing performance comprises: an optical pick-up unit (OPU) generating an initial radial error signal; a radial error (RE) calibration unit receiving said initial radial error signal from said OPU, and generating a radial actuator (RA) signal; a radial controller receiving a reliable radial error signal and generating a radial error calibration result; and a radial actuator; an offset adjuster for receiving a RE calibration signal from said RE calibration unit and generating an offset adjusted signal; and a gain adjuster for receiving said RE calibration signal from said RE calibration unit; receiving said offset adjusted signal from said offset adjuster; generating said reliable radial error signal according to said RE calibration signal and said offset adjusted signal; and sending said reliable radial error signal to said radial controller; wherein said OPU activates said radial actuator to cause tracking crossing according to said RA signal and said radial error calibration result.