Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1989-04-12
1992-04-28
Envall, Jr., Roy N.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 4434, 369 4435, 369 4429, G11B 700
Patent
active
051093669
ABSTRACT:
In an apparatus in which information is reproduced by projecting/receiving an optical beam to/from a recording carrier having a large number of information tracks, tracking control is performed so as to keep a reproducing position on an information track by supplying a track deviation signal to an actuator. If this track deviation signal becomes asymetric by an inclination, etc. of the recording carrier so that a shock is applied to the apparatus, jumping out of a track occurs, resulting in slipping-off of the reproducing position. This slipping-off can be prevented by detecting a position of a movable support member carrying a focusing lens for projecting and receiving the optical beam and feeding back the position signal to the tracking control system, or by extracting a low-frequency component of an output signal of a control circuit and feeding back the extracted signal to the tracking control system.
REFERENCES:
patent: 4562562 (1985-12-01), Moriya et al.
patent: 4607358 (1986-08-01), Maed et al.
patent: 4628497 (1986-12-01), Bierhoff
patent: 4663751 (1987-05-01), Kaku et al.
patent: 4745587 (1988-05-01), Maeda et al.
patent: 4785439 (1988-11-01), Okada et al.
patent: 4813031 (1989-03-01), Bierhoff
patent: 4839876 (1989-06-01), Fennema
patent: 4866687 (1989-09-01), Kasai et al.
patent: 4954905 (1990-09-01), Wakabashi et al.
Moriya Mitsuro
Shioya Masayoshi
Yamaguchi Hiroyuki
Envall Jr. Roy N.
Hindi Nabil
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Slip-off preventing tracking control 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 Slip-off preventing tracking control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slip-off preventing tracking control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1252895