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    • 1. 发明授权
    • Optical information recording/reproducing method and optical information recording/reproducing apparatus
    • 光信息记录/再现方法和光信息记录/再现装置
    • US06510116B1
    • 2003-01-21
    • US09493102
    • 2000-01-28
    • Naoyasu MiyagawaTakashi IshidaJunichi MinaminoKenji KoishiShigeru Furumiya
    • Naoyasu MiyagawaTakashi IshidaJunichi MinaminoKenji KoishiShigeru Furumiya
    • G11B509
    • G11B7/00456G11B7/00736G11B7/24085G11B20/10009G11B20/10481G11B2020/1275G11B2220/2537
    • When data is reproduced by an apparatus which is different from an apparatus used for recording the data, the fluctuation of edge positions of the reproducing data increases, making reproduction incompatible, and the present invention solves this problem. The present invention comprises reproducing learning means 13 and 24 for switching a frequency characteristic of the reproducing system, which detects the changes of the local optical constant, to a predetermined frequency characteristic, and recording learning means 20 for correcting the start edge or end edge position of the recording pulse for each combination of length of a mark block and length of the preceding or subsequent space, so that the edge position of the binarized reproducing data comes to a desired position, and since the frequency characteristic of the reproducing system is unified before learning the edge shift amount caused by the thermal interference between marks, the length of the recorded marks and spaces can always be constant, which improves the reproducing compatibility among reproducing apparatuses.
    • 当通过与用于记录数据的装置不同的装置再现数据时,再现数据的边缘位置的波动增加,使得再现不兼容,并且本发明解决了这个问题。 本发明包括用于将检测局部光学常数的变化的再现系统的频率特性切换到预定频率特性的再现学习装置13和24,以及用于校正起始边缘或结束边缘位置的记录学习装置20 对于标记块的长度和前一或后续空格的长度的每个组合的记录脉冲,使得二值化再现数据的边缘位置到达期望位置,并且由于再现系统的频率特性在 学习由标记之间的热干扰引起的边缘偏移量,记录的标记和间隔的长度总是恒定的,这提高了再现装置之间的再现兼容性。
    • 2. 发明授权
    • Optical information recording/reproducing device and method for
recording, reproducing and erasing information on an optical
information recording medium utilizing light beam radiation
    • 用于利用光束辐射在光学信息记录介质上记录,再现和擦除信息的光学信息记录/再现装置和方法
    • US6044051A
    • 2000-03-28
    • US827748
    • 1997-04-09
    • Naoyasu MiyagawaMamoru ShojiTakashi IshidaShigeru FurumiyaYuji Hisakado
    • Naoyasu MiyagawaMamoru ShojiTakashi IshidaShigeru FurumiyaYuji Hisakado
    • G11B7/007G11B7/013G11B20/10G11B20/12G11B27/19G11B27/30G11B7/00
    • G11B27/3027G11B20/10009G11B20/1252G11B27/19G11B7/00718G11B7/00745G11B7/013G11B2220/20
    • There is provided an optical information recording/reproducing device for recording, reproducing, or erasing information on an optical information recording medium including information tracks formed on a disk substrate including alternating groove tracks and land tracks each including: a header region for recording identification data representing location information in pre-pits; and a data region for recording user data, the pre-pits being grouped into blocks, the blocks wobbling alternately toward an inner periphery or an outer periphery of the disk substrate along a radius direction from a center line of each information track by a distance which is substantially 1/2 of the information track pitch. The pre-pits are provided along the radius direction at a pitch twice as large as the track pitch. The device includes: an optical system for radiating a light beam as a converged beam spot on an information track; an optical detector including two light receiving portions divided in parallel to the track direction for receiving the light beam reflected from the recording medium; a signal generator for generating a differential signal and an addition signal of output signals respectively output from the light receiving portions; a header region detection circuit for determining whether the converged beam spot is tracing the header region or the data region using the differential signal; and at least one reading circuit for reading the identification data from the differential signal and for reading information recorded in the data region from the addition signal.
    • 提供了一种光学信息记录/再现装置,用于在包括形成在包括交替的凹槽轨道和脊迹道的盘基底上的信息轨迹的光信息记录介质上记录,再现或擦除信息,所述光盘信息记录介质包括:标题区,用于记录表示 预坑中的位置信息; 以及用于记录用户数据的数据区域,将预定凹坑分组成块,块沿着每个信息轨道的中心线沿半径方向交替地向盘基板的内周或外周摆动一距离 基本上为信号轨道间距的+ E,fra 1/2 + EE。 预制坑沿着半径方向以轨道间距的两倍大的间距设置。 该装置包括:用于在信息轨道上辐射作为会聚束斑的光束的光学系统; 光检测器,其包括与轨道方向平行分割的两个光接收部分,用于接收从记录介质反射的光束; 信号发生器,用于产生分别从光接收部分输出的差分信号和输出信号的相加信号; 标题区域检测电路,用于使用所述差分信号来确定所述会聚波束点是跟踪所述头部区域还是所述数据区域; 以及至少一个读取电路,用于从差分信号读取识别数据,并用于从加法信号读取记录在数据区中的信息。