Track format for use with an optical record carrier having a var

Details Track format for use with an optical record carrier having a var Track format for use with an optical record carrier having a var

1990-06-29

1993-12-14

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

3692753, G11B 700

Patent

active

052709914

ABSTRACT:
The present invention provides a track format for an optical record carrier that is useful in producing a tracking signal with a substantially constant slope at its zero-crossing point for a range of track pitches. The preferred embodiment of track format is also useful in producing a tracking signal that has a substantially constant amplitude over a range of track pitches. The track format, in the preferred embodiment, employs wobbled pits. The sequence in which the wobbled pits occur alternates between adjacent tracks and the offset of the wobbled pits with respect to the center line of a track remain constant regardless of the track pitch. The preferred embodiment of the track format also includes a reference pit that is used to establish the threshold detection level for the read electronics. The location of the reference alternates between tracks to reduce the effect of radial interference on the signal produced using the reference pit and thereby allow an optimal threshold level to be established.

REFERENCES:
patent: 4118734 (1978-10-01), Bouwhuis et al.
patent: 4456981 (1984-06-01), Silvy et al.
patent: 4779253 (1988-10-01), Getreuer et al.
patent: 4839882 (1989-06-01), Janssen
patent: 4858221 (1989-08-01), Romeas
patent: 4932017 (1990-06-01), Van Vijen
patent: 5012460 (1991-04-01), Popovich et al.
patent: 5034940 (1991-07-01), Saito et al.
patent: 5073880 (1991-12-01), Maeda et al.

Affiliated with

Also associated with

Rating

Track format for use with an optical record carrier having a var does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Track format for use with an optical record carrier having a var, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Track format for use with an optical record carrier having a var will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1711878