Optical drive
AssigneePanasonic Corporation
InventorsHiroshi Kayama, Kazuo Momoo
Life of this patent
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Abstract
An optical drive according to the present invention can write information on an optical disc, which includes a substrate on which a number of pre-pits (2) have been formed on its tracks (t1 to t8) and a recording film that is supported on the substrate. The optical drive includes an optical pickup, and a writing control section for controlling the optical pickup so that marks (3a, 3b) are recorded on the tracks (t1 to t8) so as to overlap with some of the pre-pits (2) and for making the optical pickup irradiate the recording film with a writing light beam. The recorded marks (3a, 3b) overlap with at least ten of the pre-pits (2).
Claims17
An optical drive with the ability to write information on an optical disc, the disc including a substrate on which a number of pre-pits have been formed on its tracks and a recording film that is supported on the substrate,
- wherein the optical drive comprises
- an optical pickup, and
- a writing control section that controls the optical pickup so that marks are recorded on the tracks so as to overlap with some of the pre-pits, the writing control section making the optical pickup irradiate the recording film with a writing light beam, and
- wherein the recorded marks overlap with at least ten of the pre-pits.
An optical drive with the ability to write information on an optical disc, the disc including a substrate on which a number of pre-pits have been formed on its tracks and a recording film that is supported on the substrate,
- wherein the optical drive comprises
- an optical pickup, and
- a writing control section that controls the optical pickup so that marks are recorded on the tracks so as to overlap with some of the pre-pits, the writing control section making the optical pickup irradiate the recording film with a writing light beam, and
- wherein the writing control section controls the power of the writing light beam so that reflectance varies just locally in portions of the recording film that are located over dented pre-pits, and
- wherein each said recorded mark is made up of multiple portions with locally varied reflectances.
An optical drive with the ability to write information on an optical disc, the disc including a substrate on which a number of pre-pits have been formed on its tracks and a recording film that is supported on the substrate,
- wherein the optical drive comprises
- an optical pickup, and
- a writing control section that controls the optical pickup so that marks are recorded on the tracks so as to overlap with some of the pre-pits, the writing control section making the optical pickup irradiate the recording film with a writing light beam, and
- wherein the writing control section controls the power of the writing light beam so that portions of the recording film that are located over the dented pre-pits are deformed locally, and
- wherein each said recorded mark is made up of multiple portions that have been locally deformed.
Dependencies are inferred from the claim text.