Apparatus for reading or writing optical recording carriers

Details Apparatus for reading or writing optical recording carriers Apparatus for reading or writing optical recording carriers

G - Physics

11

B

G11B 7/135 (2006.01) G11B 7/09 (2006.01) G11B 7/14 (2006.01)

Patent

CA 2259580

The present invention relates to a device for reading from or writing to optical recording media, which uses the "Differential Phase Detection Method" for tracking. This method has deficiencies if optical recording media (4) having different pit depths are to be used. The object of the present invention is to propose a device of this type which can also be used with the said optical recording media (4). This object is achieved by virtue of the fact that delay elements (7, 8, 9, 10) are arranged between the photodetector (5) and the phase detector (14). The device according to the invention is used as a playback or recording device for optical recording media such as, for example, CD, CD-ROM, CD-I, CD-R, DVD, DVD-ROM, DVD-R, etc.

L'invention concerne un appareil pour lire ou enregistrer des données sur des supports d'enregistrement optiques, qui utilise le procédé de détection de phase différentielle à des fins d'alignement. Ce procédé présente des failles lorsque les supports d'enregistrement (4) optiques de différentes profondeurs de microcuvette doivent être utilisés. L'invention vise à proposer un appareil de ce type qui puisse également être utilisé avec lesdits supports d'enregistrement (4) optiques. A cet effet, les éléments de temporisation (7, 8, 9, 10) sont disposés entre le photodétecteur (5) et le comparateur de phase (14). L'appareil réalisé selon l'invention s'utilise comme appareil d'audition ou d'enregistrement pour des supports d'enregistrement optiques tels que des CD, des CD-ROM, des CD-I, des CD-R, des DVD, des DVD-ROM, des DVD-R, etc.

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