Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1998-05-04
2000-07-18
Tran, Thang V.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4426, 369 4429, 369 4437, G11B 709
Patent
active
060916796
ABSTRACT:
A tracking error signal generating method includes: a light irradiating process of irradiating a plurality of tracks, which are on an information record medium and adjacent to each other with an interval smaller than a size of a light beam in a radial direction of the information record medium, with the light beam, while relatively moving the light beam in the radial direction and a tangential direction of the tracks with respect to the tracks; a light receiving process of receiving a reflection light from the tracks irradiated with the light beam, and generating a detection signal based on the received reflection light; a judging process of performing a judgment of a recording portion and a non-recording portion on at least one of the tracks irradiated with the light beam, on the basis of the detection signal; a signal acquiring process of acquiring a specific signal, which indicates a change of the detection signal in correspondence with a displacement in the radial direction of the light beam relative to the tracks and whose changing direction is varied depending on a direction of the displacement, on the basis of a judgment result by the judging process; and a polarity switching process of switching over a polarity of the specific signal on the basis of the judgment result.
REFERENCES:
patent: 5280466 (1994-01-01), Tomita
patent: 5400312 (1995-03-01), Haraguchi
patent: 5416766 (1995-05-01), Horimai
patent: 5475662 (1995-12-01), Miyagawa
patent: 5508995 (1996-04-01), Moriya et al.
patent: 5537374 (1996-07-01), Wachi
patent: 5616390 (1997-04-01), Miyagawa et al.
patent: 5623478 (1997-04-01), Horimai
patent: 5754506 (1998-05-01), Nagasawa et al.
patent: 5757746 (1998-05-01), Matsui
patent: 5896365 (1999-04-01), Hiroki
patent: 5936932 (1999-08-01), Nakane et al.
patent: 5978327 (1999-11-01), Kuroda et al.
Kuribayashi Hiroki
Maeda Takanori
Pioneer Electronic Corporation
Tran Thang V.
LandOfFree
Tracking error signal generating 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 Tracking error signal generating method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking error signal generating method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2044101