Opticaldisk drive

Abstract

An optical disk drive which uses an optical disk as a recording medium is provided with a skew control mechanism which controls the relative inclination between the optical disk and an objective lens so as to selectively record and / or reproduce data on first optical disk having a standard recording density or a second optical disk of a higher recording density. Only when the second disk is loaded and data are recorded on and / or reproduced from the second optical disk, the relative inclination between the objective lens and second disk is controlled by means of the skew control mechanism.

Description

technical field [0001] The invention relates to an optical disk drive device, in particular to a variety of optical disks with different design formats, such as recording capacities, which can be selected and used. Background technique [0002] Optical discs capable of recording and / or reproducing information signals using light beams have hitherto been used. Among such optical discs used are compact read-only discs (CDs) and CD-ROM discs provided with pre-recorded music data or information data processed by a computer. [0003] It has been planned to release a high-density (HD) optical disc or a high-density (HD)-CD-ROM disc whose recording density is two to three times that of a standard-density CD or CD-ROM disc. [0004] There are also plans to introduce a Digital Versatile Disc / Digital Video Disc (DVD) as an optical disc, which is the same size as a CD or CD-ROM disc but 7 to 8 times denser. [0005] There is also a recording / reproducing magneto-optical disc which is ...

AI Technical Summary

Problems solved by technology

If the optical disc with high recording density is used as the recording medium, the verticality of the objective lens relative to the optical disc is not kept at high precision, and the light spot incident on the signal recording surface is deformed and narrowed in width, so that the recording track with a narrow pitch cannot be recorded. scan correctly

For example, it may happen that a single light spot is irradiated on adjacent recording tracks at the same time, so that the energy density of the beam on the predetermined recording track is reduced, so that the recording / reproduction of data cannot be performed correctly.

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