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1. 发明授权

US07012864B2 Optical disk recorder for writing data with variable density 失效
公开(公告)号：US07012864B2
公开(公告)日：2006-03-14
申请号：US10869294
申请日：2004-06-16
申请人： Takuya Tamaru , Tatsuo Fushiki , Katsuichi Osakabe , Yusuke Konagai , Akira Usui , Kentaro Nomoto , Masaki Dojun , Kazuhiko Honda
发明人： Takuya Tamaru , Tatsuo Fushiki , Katsuichi Osakabe , Yusuke Konagai , Akira Usui , Kentaro Nomoto , Masaki Dojun , Kazuhiko Honda
IPC分类号： G11B7/0045
CPC分类号： G11B27/24 , G11B7/0045 , G11B7/0079 , G11B20/1258 , G11B20/14 , G11B20/1403 , G11B27/034 , G11B27/30 , G11B27/3027 , G11B27/3036 , G11B27/3063 , G11B2020/1238 , G11B2020/1269 , G11B2020/1292 , G11B2220/216 , G11B2220/218 , G11B2220/2529 , G11B2220/2545 , G11B2220/2562
摘要： An optical disk recording apparatus operates on an optical disk having circular tracks which are provisionally written with an index signal used for securing a constant linear velocity of the optical disk from an innermost circular track to an outermost circular track, and records data along the circular tracks at different linear densities on different annular zones of the optical disk. In the apparatus, a disk drive section rotates the optical disk while synchronizing the index signal successively read from the rotated optical disk with a predetermined reference clock signal to thereby maintain the constant linear velocity of the circular tracks. A clock generating section multiples or divides the reference clock signal by different rates to generate different writing clock signals in correspondence to the different annular zones of the optical disk. A data recording section operates in synchronization to the different writing clock signals for recording data along the circular tracks at the different linear densities on the different annular zones.

2. 发明授权

US06980495B2 Optical recording apparatus with interleaving blank rounds into spiral track 失效
标题翻译：具有交错空白的光学记录装置进入螺旋轨迹
公开(公告)号：US06980495B2
公开(公告)日：2005-12-27
申请号：US10600691
申请日：2003-06-20
申请人： Katsuichi Osakabe , Akira Usui , Shinji Aoshima , Hiromitsu Shibata , Masaki Dojun
发明人： Katsuichi Osakabe , Akira Usui , Shinji Aoshima , Hiromitsu Shibata , Masaki Dojun
IPC分类号： G11B7/0045 , G11B7/00 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/095 , G11B7/125
CPC分类号： G11B7/24094 , G11B7/0045 , G11B7/08505 , G11B7/0903 , G11B7/0938
摘要： In an optical recording apparatus having an optical pickup, a rotating section is provided for rotating an optical disk which is formed thereon with a guide groove to define a spiral track having a plurality of rounds. The optical pickup has a light source for generating an optical beam and a diffractive grating for diffracting the optical beam to form a main beam and a pair of sub beams opposite with each other relative to the main beam. The optical pickup is operable for irradiating the main beam to the spiral track with accompanying the pair of the sub beams along apposite sides of the spiral track. A servo section operates the optical pickup to enable the main beam to trace the spiral track based on a tracking error signal derived from return lights of the sub beams reflected back from the optical disk. A recording section modulates the main beam for recording of information onto the spiral track while the optical dick is rotated. A control section controls recording of information each cycle the optical disk is rotated such that the recording of information is enabled to fill one round of the spiral track and disabled to blank another round of the spiral track so as to alternate the filled rounds and the blanked rounds.
摘要翻译：在具有光学拾取器的光学记录装置中，提供旋转部分，用于使形成有导向槽的光盘旋转，以限定具有多个圆的螺旋轨道。光拾取器具有用于产生光束的光源和衍射光栅，用于衍射光束以形成主光束和相对于主光束彼此相对的一对子光束。光学拾取器可操作用于沿着螺旋形轨迹的相对侧伴随着该对子光束将主光束照射到螺旋形轨道。伺服部分操作光学拾取器，以使得主光束能够基于从光盘反射回的子光束的返回光得到的跟踪误差信号来跟踪螺旋形轨迹。当光学转盘旋转时，记录部分将用于记录信息的主光束调制到螺旋形轨道上。控制部分控制信息的记录，每个周期旋转光盘，使得信息的记录能够填充一圈的螺旋轨迹并且被禁用以使另一轮的螺旋轨迹空白，以便交替填充的圆和被消隐的回合。

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