| 摘要 |
The invention concerns an apparatus for reading or writing optical recording carriers, the apparatus using the differential phase detection process for tracking purposes. This process exhibits shortcomings when optical recording carriers (4) of different pit depths are to be used. The object of the invention is to design an apparatus of this type which can also be used with said optical recording carriers (4). This object is achieved in that delay members (7, 8, 9, 10) are disposed between the photodetector (5) and phase detector (14). The apparatus according to the invention is used as a playback or recording apparatus for optical recording carriers, such as CDs, CD-ROMs, CD-Is, CD-Rs, DVDs, DVD-ROMs, DVD-Rs, etc. |
