公开(公告)号：US20070121445A1

公开(公告)日：2007-05-31

申请号：US11491991

申请日：2006-07-25

申请人： Koichiro Nishimura ,  Tsuyoshi Toda ,  Mitsuru Harai ,  Koichi Suzuki ,  Toru Kawashima

发明人： Koichiro Nishimura ,  Tsuyoshi Toda ,  Mitsuru Harai ,  Koichi Suzuki ,  Toru Kawashima

IPC分类号： G11B20/10

CPC分类号： G11B7/005 ,  G11B7/1263

摘要： Disclosed is a method of reproducing optical information by applying laser light to the medium while rotating a recording medium having concentric information tracks or a spiral information track so that the linear velocity of the medium is constant, and thereby reproducing the information recorded on the recording medium by the reflected light. In this method, in moving a reproduction radial position to a second radial position different from the current position, a laser power is changed to second laser power, which is different from current laser power, and then the light spot is moved to the second radial position. This method can prevent degradation of a medium in reproduction light resistance caused by substantially high power reproduction, and erasing or destruction of already recorded data that may be caused, in high-speed recording of a rewritable-type or write-once-type optical disc, when the linear velocity at the time of reproduction becomes slow, e.g. , in an access operation at the time of reproduction with a constant linear velocity and in a return operation from rotational stop due to a standby state.

摘要翻译： 公开了一种通过在旋转具有同心信息轨道或螺旋信息轨道的记录介质的同时向介质施加激光以使介质的线速度恒定从而再现记录在记录介质上的信息来再现光学信息的方法 通过反射光。 在这种方法中，在将再现径向位置移动到与当前位置不同的第二径向位置时，将激光功率改变为与当前激光功率不同的第二激光功率，然后将光斑移动到第二径向 位置。 这种方法可以防止在可重写型或一次写入式光盘的高速记录中由于基本上高功率再现引起的再现光阻中介质的劣化，以及擦除或破坏可能引起的已经记录的数据 当再现时的线速度变慢时，例如， 在以一定的线速度进行再现时的访问操作和由于待机状态的旋转停止的返回操作。

公开(公告)号：US20060126466A1

公开(公告)日：2006-06-15

申请号：US11299669

申请日：2005-12-13

申请人： Seiji Imagawa ,  Koichiro Nishimura

发明人： Seiji Imagawa ,  Koichiro Nishimura

IPC分类号： G11B5/09

CPC分类号： G11B7/08505

摘要： An optical disc reproducing apparatus and an optical disc recording apparatus for reproducing an optical disc. The apparatus includes an optical pickup unit for irradiating a laser beam to the optical disc, an optical pickup drive unit for moving the optical pickup in the radial direction of the optical disc, and a motor unit for rotating the optical disc. When a tracking jump command is issued, the optical pickup drive unit moves the optical pickup unit in the radial direction of the optical disc at the timing in accordance with the rotation speed of the optical disc after the laser beam irradiated to the optical disc has passed the address information recording portion indicating the address of the optical disc.

摘要翻译： 一种用于再现光盘的光盘再现装置和光盘记录装置。 该装置包括用于将光束照射到光盘的光学拾取单元，用于沿光盘的径向移动光学拾取器的光学拾取器驱动单元和用于旋转光盘的电动机单元。 当发出跟踪跳转命令时，光拾取器驱动单元在照射到光盘的激光束已经通过之后，根据光盘的旋转速度在光盘的径向方向上移动光学拾取单元 地址信息记录部分指示光盘的地址。