Patent ID: 7466636

Claim:
Method for generating a corrected focus error signal DFEN for the operation of an apparatus for reading from and/or writing to an optical recording medium, comprising: a primary scanning beam illuminating a track of the recording medium and a secondary scanning beam having a focus point on an adjacent complementary track being generated and the primary and secondary scanning beams reflected from the recording medium being detected by respective photodetectors, and a primary-beam focus error signal and a secondary-beam focus error signal being derived from the detected reflected primary and secondary scanning beams and being combined with one another in a weighted manner in order to form a corrected focus error signal DFEN, wherein a normalized primary-beam focus error signal CFEN and a normalized secondary-beam focus error signal OFEN are generated separately by dividing the primary-beam focus error signal and the secondary-beam focus error signal by the total quantity of light detected by the respective photodetectors, before the corrected focus error signal DFEN is formed by weighted combination therefrom.