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    • 8. 发明授权
    • Recording medium, method and apparatus for reproducing, and method and apparatus for recording
    • 用于再现的记录介质,方法和装置,以及用于记录的方法和装置
    • US06973020B2
    • 2005-12-06
    • US10221329
    • 2001-04-16
    • Mamoru ShojiAtsushi NakamuraTakashi IshidaYuji Hisakado
    • Mamoru ShojiAtsushi NakamuraTakashi IshidaYuji Hisakado
    • G11B7/00G11B7/0045G11B7/005G11B7/007G11B19/12G11B7/24
    • G11B19/125G11B7/0045G11B7/005G11B7/007G11B7/00718G11B19/128G11B2007/0013
    • In a recording medium which is circular and has first and second recording layers, the first and second recording layers each include one or more first tracks extending concentrically or spirally and one or more second tracks extending concentrically or spirally, each of the one or more first tracks and the one or more second tracks includes a plurality of first sectors and a plurality of second sectors, each of the plurality of first sectors includes first and second regions, each of the plurality of second sectors includes third and fourth regions, first and second grooves are formed in each of the second and fourth regions, the first and second grooves extending concentrically or spirally and oscillating sinusoidally, oscillation of the first groove has a first oscillation characteristic at a first prescribed position in the second region, oscillation of the second groove has a second oscillation characteristic at a second prescribed position in the fourth region, and the first and second oscillation characteristics are different from each other.
    • 在圆形并具有第一和第二记录层的记录介质中,第一和第二记录层各自包括同心或螺旋状延伸的一个或多个第一轨道和同心或螺旋地延伸的一个或多个第二轨道,一个或多个第一记录层 轨道,并且一个或多个第二轨道包括多个第一扇区和多个第二扇区,多个第一扇区中的每一个包括第一和第二区域,多个第二扇区中的每一个包括第三和第四区域,第一和第二区域 在第二和第四区域的每一个中形成有槽,第一和第二槽同心或螺旋地延伸并正弦振荡,第一槽的振荡在第二区域的第一规定位置处具有第一振荡特性,第二槽的振荡 在第四区域的第二规定位置具有第二振荡特性, 第二振荡特性彼此不同。
    • 9. 发明授权
    • Recording medium, method and apparatus for recording, and method and apparatus for reproducing
    • 用于记录的记录介质,方法和装置,以及用于再现的方法和装置
    • US07123574B2
    • 2006-10-17
    • US11242771
    • 2005-10-04
    • Mamoru ShojiAtsushi NakamuraTakashi IshidaYuji Hisakado
    • Mamoru ShojiAtsushi NakamuraTakashi IshidaYuji Hisakado
    • G11B7/24G11B5/09
    • G11B19/125G11B7/0045G11B7/005G11B7/007G11B7/00718G11B19/128G11B2007/0013
    • In a recording medium which is circular and has first and second recording layers, the first and second recording layers each include one or more first tracks extending concentrically or spirally and one or more second tracks extending concentrically or spirally, each of the one or more first tracks and the one or more second tracks includes a plurality of first sectors and a plurality of second sectors, each of the plurality of first sectors includes first and second regions, each of the plurality of second sectors includes third and fourth regions, first and second grooves are formed in each of the second and fourth regions, the first and second grooves extending concentrically or spirally and oscillating sinusoidally, oscillation of the first groove has a first oscillation characteristic at a first prescribed position in the second region, oscillation of the second groove has a second oscillation characteristic at a second prescribed position in the fourth region, and the first and second oscillation characteristics are different from each other.
    • 在圆形并具有第一和第二记录层的记录介质中,第一和第二记录层各自包括同心或螺旋状延伸的一个或多个第一轨道和同心或螺旋地延伸的一个或多个第二轨道,一个或多个第一记录层 轨道,并且一个或多个第二轨道包括多个第一扇区和多个第二扇区,多个第一扇区中的每一个包括第一和第二区域,多个第二扇区中的每一个包括第三和第四区域,第一和第二区域 在第二和第四区域的每一个中形成有槽,第一和第二槽同心或螺旋地延伸并正弦振荡,第一槽的振荡在第二区域的第一规定位置处具有第一振荡特性,第二槽的振荡 在第四区域的第二规定位置具有第二振荡特性, 第二振荡特性彼此不同。
    • 10. 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。