公开(公告)号：WO1989004040A1

公开(公告)日：1989-05-05

申请号：PCT/US1988003837

申请日：1988-10-28

Applicant: BRIER TECHNOLOGY

Inventor： BRIER TECHNOLOGY ,  BIZJAK, John, F. ,  SHENFIELD, Leonard, Roy ,  MILLER, Scott, D. ,  KENNY, Philip, C. ,  BENSON, William ,  BEHR, Michael, I.

IPC: G11B05/58

CPC classification number: G11B5/5965 ,  G11B5/5534 ,  G11B5/59661

Abstract: A track pitch independant time based servo pattern scheme used for providing position and velocity information. A plurality of servo lines (1A-7A, 1B-7B) are formed on a data disk extending from the inner track to the outer track. These servo lines can be buried beneath the data layers to increase the data storage capacity. The servo pattern can also be written on both sides of the disk so that, if the disk was transparent, the servo lines would appear to intersect when viewed from above. Servo heads (16A, 16B) located on each side of disk detect servo line crossings and by comparing the time difference between track crossings of corresponding tracks on either side of the disk the position of the heads can be determined. A concentric calibration track (109) is used to determine the offsets between the desired data heads (20) and servo heads (28) positions.

Abstract translation: 用于提供位置和速度信息的轨道间距独立时基伺服模式方案。 在从内轨到外轨延伸的数据盘上形成有多条伺服线（1A-7A，1B-7B）。 这些伺服线路可以埋在数据层之下，以增加数据存储容量。 伺服模式也可以写在磁盘的两侧，因此如果磁盘是透明的，伺服线将从上方观看时会相交。 位于盘的每一侧的伺服头（16A，16B）检测伺服线路交叉，并且通过比较盘的任一侧的相应轨道的轨道交叉点之间的时间差，可以确定头部的位置。 使用同心校准轨道（109）来确定期望的数据头（20）和伺服头（28）位置之间的偏移。