| 摘要 |
<p>The present invention relates to a method and a device for determining spherical aberration occurring during reading from and/or writing to optical recording media. <??>According to the invention, a method for determining spherical aberration includes the steps of: splitting the light beam 2 into at least two partial light beams 20, 21, 22, 23, 24, 25; focusing the partial light beams 20, 21, 22, 23, 24, 25 onto respective detectors 11, 12, 13, 16, 17, 18, whereby at least one signal A, B, C, D generated by the detectors 12, 13, 16, 17, 18 depends on the positions of the respective partial light beam 21, 22, 23, 24, 25; and determining the spherical aberration using the signals A, B, C, D generated by the detectors 12, 13, 16, 17, 18. <IMAGE></p> |
