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US 6,295,270 B1Granted
Optical record carrier with grooves having wobbles with phases depending on position information pits at predetermined positions
AssigneeU.S. Philips Corporation
InventorsGijsbert J. Van Den Enden, Johannes H. M. Spruit, Johannes J. L. M. Van Vlerken, Ronald R. Drenten
Life of this patent
Estimating the term…
Abstract
An optical disk has tracks with a groove wobbled in a radial direction and addressing information at predetermined positions along the track. Embossed pits at the predetermined positions represent addressing information. The phase of the wobble near the predetermined positions depends on whether a pit is present on a predetermined position or not.
Claims9
An optical record carrier comprising:
- a substrate;
- a recording layer having substantially parallel tracks for recording information in a pattern of optically detectable marks;
- wobbled grooves along the tracks;
- pits for storing position information at predetermined positions along the tracks, the wobble being discontinuous so that the phase of the wobble at the predetermined positions depends on the presence of a pit at such a predetermined position.
1 more element
An optical record carrier, comprising:
- a substrate;
- a recording layer having substantially parallel tracks for recording information in a pattern of optically detectable marks;
- wobbled grooves along the tracks;
- pits for storing position information at predetermined positions along the tracks, the phase of the wobble at the predetermined positions depends on the presence of a pit at such a predetermined position;
- and wherein the wobble has a minimum value at a predetermined position with pit and a maximum value at a predetermined position without pit.
2 more elements
An optical record carrier, comprising:
- a substrate;
- a recording layer having substantially parallel tracks for recording information in a pattern of optically detectable marks;
- wobbled grooves along the tracks;
- pits for storing position information at predetermined positions along the tracks, the phase of the wobble at the predetermined positions depends on the presence of a pit at such a predetermined position;
- and wherein the phases of both neighboring grooves depend on the presence of a pit at a predetermined position and the wobble of both neighboring grooves is in anti-phase.
2 more elements
Dependencies are inferred from the claim text.