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    • 2. 发明授权
    • Track-accessing controller for optical disks
    • 磁盘跟踪访问控制器
    • US5193081A
    • 1993-03-09
    • US486385
    • 1990-02-28
    • Hideaki OsawaNaobumi Seo
    • Hideaki OsawaNaobumi Seo
    • G11B7/007G11B7/085G11B7/09
    • G11B7/08541G11B7/00745G11B7/0901G11B7/0938
    • Disclosed is an optical disk apparatus applied to a data writing/reproducing operation of a sample-servo formatted optical disk having a clock pit and two wobbled pits in each of servo regions. A photodetector receives reflected light of a light beam from the optical disk to produce a reflected light signal. A clock detection unit detects a change in intensity of reflected light components from the clock pit in response to the reflected light signal to produce a binary clock pit detection signal. A tracking error detection unit detects a change in peak intensity of reflected light components from the wobbled pits in each servo region in response to the reflected light signal to produce a binary tracking error signal representing the detected intensity difference. A determination unit is connected to the clock detection unit and the tracking error detection unit. The determination unit compares a phase of a clock pit detection signal with that of a tracking error signal to determine a crossing direction of a beam spot with respect to some of the tracks on the optical disk in accordance with the comparison result of the phases.
    • 公开了一种适用于在每个伺服区域中具有时钟凹坑和两个摆动凹坑的采样伺服格式化光盘的数据写入/再现操作的光盘装置。 光电检测器接收来自光盘的光束的反射光以产生反射光信号。 时钟检测单元响应于反射光信号检测来自时钟凹坑的反射光分量的强度变化,以产生二进制时钟凹坑检测信号。 跟踪误差检测单元响应于反射光信号检测来自每个伺服区域中的波动凹坑的反射光分量的峰值强度的变化,以产生表示检测到的强度差的二进制跟踪误差信号。 确定单元连接到时钟检测单元和跟踪误差检测单元。 确定单元将时钟凹坑检测信号的相位与跟踪误差信号的相位进行比较,以根据相位的比较结果确定光点相对于光盘上的一些轨道的交叉方向。
    • 9. 发明授权
    • Optical information recording medium and information recording method
    • 光信息记录介质和信息记录方法
    • US06128260A
    • 2000-10-03
    • US55349
    • 1998-04-06
    • Koki TanoueHideaki Osawa
    • Koki TanoueHideaki Osawa
    • G11B20/12G11B7/00G11B7/0045G11B7/006G11B7/007G11B5/09
    • G11B7/006
    • Information is recorded/reproduced on/from an information recording medium in units of sectors each having a preformatted header field and a recording field using a change in optical characteristics due to a phase change. The recording field includes an actual recording field rewritably records information, and a gap field arranged before the actual recording field, having a length set on the basis of a random number, and having no information. The recording start position of the actual recording field is set at random. A guard field recording dummy data and having a length set on the basis of a random number is formed next to the gap field. Start portion degradation in the recording layer due to overwrite is generated only in the guard field.
    • 信息以信息记录介质的形式记录/重放,每个扇区各自具有预格式标题字段和使用由于相变引起的光学特性变化的记录字段。 记录区域包括可重写地记录信息的实际记录区域和布置在实际记录区域之前的间隔区域,其具有基于随机数设置的长度,并且不具有信息。 实际记录区域的记录开始位置是随机设置的。 在间隙字段旁边形成记录虚拟数据并且基于随机数设定的长度的保护区域。 仅在保护区域中才产生由覆盖引起的记录层中的起始部分劣化。