Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1995-06-28
1997-03-25
Dinh, Tan
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
3692753, G11B 724
Patent
active
056152051
ABSTRACT:
A bi-level optical storage media is disclosed. The media includes a flat substrate patterned with a regular pattern of lands and grooves, each land and groove having approximately equal widths. Information wobble marks of a first and second type are added to the lands and grooves as deviations in the path of each groove to a first and second side respectively. The deviation distance is by a fixed amount perpendicular to the direction of a groove and identical in magnitude for each wobble mark, and having a short duration length along the direction of a groove. Additionally, groove depths are provided in the grooves. Both the groove depth and the wobble mark deflection distances are chosen to give a usable reflectivity signal from the wobble marks when sensed during playback. Additionally, encodings using the first and second wobble mark types are provided that designate the physical location of a length of groove or land as distinguished from other length of grooves or lands. The wobble marks are present or absent at wobble mark positions, these wobble positions being aligned perpendicular to the direction of the grooves on each groove for all grooves in a group of grooves. The wobble mark or no wobble mark usage at each wobble mark position is encoded such that adjacent grooves are not deflected toward one another. Lastly the first and second type wobble mark usage is balanced as to duration length in each deflection side over a short length along the direction of any groove. These balanced deflections keep the push/pull position error signal from being biased into indicating an erroneous center position perpendicular to the groove direction.
REFERENCES:
patent: 4385372 (1983-05-01), Drexlerl
patent: 4443870 (1984-04-01), Hazel et al.
patent: 4712204 (1987-12-01), Takemura et al.
patent: 4761775 (1988-08-01), Murakami
patent: 4984901 (1991-01-01), Maury
patent: 4985881 (1991-05-01), Saito et al.
patent: 5031166 (1991-07-01), Getreuer et al.
patent: 5070492 (1991-12-01), Ogawa et al.
patent: 5136564 (1992-08-01), Tobita
patent: 5170385 (1992-12-01), Senshu et al.
patent: 5255261 (1993-10-01), Iida et al.
patent: 5305302 (1994-04-01), Hardwick
patent: 5315567 (1994-05-01), Fuji et al.
patent: 5321675 (1994-06-01), Ito et al.
patent: 5325352 (1994-06-01), Matsumoto
patent: 5353277 (1994-10-01), Yasuda et al.
patent: 5508995 (1996-04-01), Moriya et al.
H. E. Korth, Sectored Servo Headers for Optical Storage Devices, Mar. 1989, vol. 31, No. 10, p. 256.
K. Kobayashi and F. Yamada, New Pre-Formatting for Magneto-Optical Disk Mastering, May 1991, vol. 33, No. 12, p. 442.
Dillon Andrew J.
Dinh Tan
International Business Machines - Corporation
Millett Douglas R.
LandOfFree
Bi-level optical media having embossed header format does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bi-level optical media having embossed header format, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bi-level optical media having embossed header format will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2210174