公开(公告)号：US20070081440A1

公开(公告)日：2007-04-12

申请号：US11509193

申请日：2006-08-23

申请人： Makoto Horiyama ,  Masaru Ogawa

发明人： Makoto Horiyama ,  Masaru Ogawa

IPC分类号： G11B7/135

CPC分类号： G11B7/22 ,  G11B7/0908 ,  G11B7/124 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1356

摘要： In an integrated optical unit of the present invention, a photo detector (12) and a holding member (17) that sustains a semiconductor laser (11) are provided on a polarizing beam splitter (14). This makes it possible to reduce a deviation from a designed value due to tolerance, and adjust a relative positional relationship between the semiconductor laser (11) and the photo detector (12). Therefore, returned light from an optical disk (4) is accurately adjusted with respect to a division line of a photo-detecting device (13). As a result, stable servo-control is realized, and an information signal with fine quality is obtained.

摘要翻译： 在本发明的集成光学单元中，在偏振分束器（14）上设置有光电检测器（12）和保持半导体激光器（11）的保持部件（17）。 这使得可以减小由于公差而偏离设计值，并且调整半导体激光器（11）和光电检测器（12）之间的相对位置关系。 因此，相对于光检测装置（13）的分割线精确地调整来自光盘（4）的返回光。 结果，实现了稳定的伺服控制，并且获得了具有良好质量的信息信号。

公开(公告)号：US20060062098A1

公开(公告)日：2006-03-23

申请号：US10517245

申请日：2003-06-20

申请人： Takahiro Miyake ,  Makoto Horiyama

发明人： Takahiro Miyake ,  Makoto Horiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/0945

摘要： An optical pickup (20) projects a read beam onto an optical disc (40) as an optical storage medium which is driven to rotate by a spindle motor (30) and receives its reflection. A laser beam from a laser producing element (21) passes through a liquid crystal panel (25) and guided to an objective lens (26). The panel (25) is provided to correct spherical aberration caused by an irregular thickness of a transparent substrate of the optical disc (40). A control circuit (50) changes a spherical aberration correction signal SA to carry out sampling more than once, covering a range of the output of an optical sensor (31) where the output shows large changes. The circuit (50) determines the position of a peak of an approximation curve through calculation and designates that position as the magnitude of correction. Thus, the optical pickup (20) can quickly and accurately detect the magnitude of the correction of the spherical aberration caused by an irregular thickness of the optical disc (40).

摘要翻译： 光学拾取器（20）将读取光束投射到作为光学存储介质的光盘（40）上，该光学存储介质被主轴电机（30）驱动旋转并接收其反射。 来自激光产生元件（21）的激光束通过液晶面板（25）并被引导到物镜（26）。 提供面板（25）以校正由光盘（40）的透明基板的不规则厚度引起的球面像差。 控制电路（50）改变球面像差校正信号SA以进行多次采样，覆盖输出显示较大变化的光学传感器（31）的输出范围。 电路（50）通过计算确定近似曲线的峰值的位置，并将该位置指定为校正的大小。 因此，光学拾取器（20）可以快速且准确地检测由光盘（40）的不规则厚度引起的球面像差校正的大小。

公开(公告)号：US06614720B1

公开(公告)日：2003-09-02

申请号：US09559515

申请日：2000-04-27

申请人： Nobuo Ogata ,  Chiaki Kiyooka ,  Makoto Horiyama ,  Kohji Minami ,  Takahiro Miyake ,  Yasuo Nakata

发明人： Nobuo Ogata ,  Chiaki Kiyooka ,  Makoto Horiyama ,  Kohji Minami ,  Takahiro Miyake ,  Yasuo Nakata

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1398

摘要： Beam shaping means may have a shaping ratio set to allow a light beam emitted from a semiconductor laser and having an elliptic intensity distribution to have an ellipticity of no more than two to obtain a spot achieving high light availability and reduced in size. Furthermore, the shaping ratio can be set to no more than 2.5 to allow a polalized-beam splitter (light separation means) and other components to be arranged in a converged flux passing between the semiconductor laser and a collimator lens.

摘要翻译： 光束成形装置可以具有设置成允许从半导体激光器发射的并且具有椭圆形强度分布的光束具有不大于2的椭圆率的成形比，以获得实现高光可用性并减小尺寸的光斑。 此外，成形比可以设定为不大于2.5，以允许在半导体激光器和准直透镜之间通过的会聚通量中布置有光束分束器（光分离装置）和其他部件。