公开(公告)号：EP0076347B1

公开(公告)日：1987-02-04

申请号：EP81304664.6

申请日：1981-10-07

Applicant: DRC-SOUNDSTREAM INC.

Inventor： Russell, James Torrance

IPC: G11B7/08

CPC classification number: G11B27/102 ,  G11B7/0033 ,  G11B7/085 ,  G11B7/09

公开(公告)号：EP0076347A1

公开(公告)日：1983-04-13

申请号：EP81304664.6

申请日：1981-10-07

Applicant: DRC-SOUNDSTREAM INC.

Inventor： Russell, James Torrance

IPC: G11B7/08

CPC classification number: G11B27/102 ,  G11B7/0033 ,  G11B7/085 ,  G11B7/09

Abstract: An optical playback machine, which plays back data recorded on an optical record (10) in track segments (35, L), employs a track intercept apparatus to transversely deflect a scanning light beam (18) during each scan to accurately intercept each selected track segment despite record or optical misalignment. A track intercept control circuit (50, 52, 60) includes storage means (80) for storage of variable values of track alignment data, adjust means (90) for producing an adjustment signal from the stored data and timing means (70) controlling gating circuitry for applying the adjustment signal to a light beam deflection means (45, 47) at the proper point in each scan. One embodiment compensates for track-following corrections made during scanning by returning the scanning light beam to a stored starting position. Another embodiment electronically aligns the scanner optics. A third embodiment uses data track addresses to direct the scanning light beam to the correct track. A fourth embodiment combines the first three embodiments.

Abstract translation: 回放记录在轨道段（35，L）上的光学记录（10）上的数据的光学重放机器采用轨道拦截装置在每次扫描期间横向偏转扫描光束（18），以精确地截取每个所选轨道 尽管记录或光学未对准。 轨道截距控制电路（50,52,60）包括用于存储轨道对准数据的可变值的存储装置（80），用于从所存储的数据产生调整信号的调整装置（90）和控制门控的定时装置（70） 用于将调整信号施加到每次扫描中适当点处的光束偏转装置（45,47）的电路。 一个实施例通过将扫描光束返回到存储的起始位置来补偿在扫描期间进行的跟踪校正。 另一实施例电子校准扫描器光学元件。 第三实施例使用数据轨道地址将扫描光束引导到正确的轨道。 第四实施例组合了前三个实施例。