公开(公告)号：US06768091B2

公开(公告)日：2004-07-27

申请号：US10342498

申请日：2003-01-14

申请人： Takahiro Yamamoto ,  Shigeharu Honda ,  Kenji Takahashi

发明人： Takahiro Yamamoto ,  Shigeharu Honda ,  Kenji Takahashi

IPC分类号： G02B2740

CPC分类号： G11B7/1263 ,  G11B7/1362 ,  G11B7/1381

摘要： An optical pick-up device includes a semi-conductor laser as a laser light-emitting device, a collimator lens, a directional control mirror, an objective lens, a light amount detecting device, a reflecting mirror that reflects leakage light of the laser light onto the light amount detecting device, and a light amount adjusting member that adjusts the amount of light incident on the light amount detecting device, provided between the light amount detecting device and the reflecting mirror. The light amount adjusting member may include a rotatably or slidably-supported baffle of which a rotational angle or slide position is changed so as to adjust the amount of the light.

摘要翻译： 光拾取装置包括作为激光发光装置的半导体激光器，准直透镜，方向控制镜，物镜，光量检测装置，反射激光的泄漏光的反射镜 以及光量调节构件，其调整设置在光量检测装置和反射镜之间的光量检测装置的入射光量。 光量调节构件可以包括可旋转或可滑动支撑的挡板，其中转动角度或滑动位置被改变以调节光量。

公开(公告)号：US5291345A

公开(公告)日：1994-03-01

申请号：US733100

申请日：1991-07-19

申请人： Yoshiaki Umeda ,  Hiroo Shimegi ,  Manabu Ogura ,  Akira Nikaido ,  Fumio Sakamoto ,  Shigeharu Honda

发明人： Yoshiaki Umeda ,  Hiroo Shimegi ,  Manabu Ogura ,  Akira Nikaido ,  Fumio Sakamoto ,  Shigeharu Honda

IPC分类号： G11B11/10 ,  G11B5/02 ,  G11B11/105 ,  G11B5/127

CPC分类号： G11B11/1056

摘要： An apparatus for applying a magnetic field has a permanent magnet, pivotally supported, which has an approximate cylindrical shape, respective semicircles of a circular section thereof being magnetized as N and S poles, and a driving coil, located in the vicinity of the permanent magnet so that the permanent magnet can partially penetrate inside the loops of the driving coil, the rotation and the positioning of the permanent magnet being controlled by the strength and/or directions of current flow in the driving coil. The apparatus is used for a magneto-optical disk storage. Since the driving coil is close to the permanent magnet, the pivoting of the permanent magnet can be controlled with a fast response. In addition, the apparatus can be made relatively small.

摘要翻译： 用于施加磁场的装置具有永久磁铁，其枢转地支撑，其具有近似的圆柱形形状，其圆形截面的相应半圆被磁化为N和S极，并且驱动线圈位于永磁体附近 使得永磁体可以部分地穿透驱动线圈的环中，永磁体的旋转和定位由驱动线圈中的电流的强度和/或方向控制。 该装置用于磁光盘存储。 由于驱动线圈靠近永磁体，所以可以快速响应地控制永久磁铁的转动。 另外，可以使该装置相对较小。