DRDW differential phase tracking method and apparatus

Details DRDW differential phase tracking method and apparatus DRDW differential phase tracking method and apparatus

1998-01-07

1999-06-22

Hindi, Nabil

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, G11B 700

Patent

active

059149256

ABSTRACT:
A DRDW differential phase tracking method including the steps of writing marks to a groove on an optical storage media utilizing a write beam; reading the trailing edge of each mark which is in the process of formation by the same write beam; detecting the diagonal signal components from a quadrature photodetector positioned in the path of the write beam reflected from the optical storage media; and forming a tracking error signal either as a function of the difference between the two diagonal signals out of the quadrant detector or as a function of the differential phase between the two diagonal signals out of the quadrant detector.

REFERENCES:
patent: 4467462 (1984-08-01), Shibata
patent: 4785441 (1988-11-01), Tanaka et al.
patent: 4924455 (1990-05-01), Fujiie et al.
patent: 5060216 (1991-10-01), Suzuki et al.
patent: 5406540 (1995-04-01), Longman et al.
patent: 5629921 (1997-05-01), Eastman et al.
patent: 5784348 (1998-07-01), Eastman et al.
M. de Haan and Di Chen, Design Considerations of an Optical Digital Data Storage Drive.

Affiliated with

Also associated with

Rating

DRDW differential phase tracking method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with DRDW differential phase tracking method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DRDW differential phase tracking method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1712725