公开(公告)号：US5488594A

公开(公告)日：1996-01-30

申请号：US110960

申请日：1993-08-24

申请人： Fumio Kobayashi ,  Ikuo Kasuga ,  Akira Miyamae

发明人： Fumio Kobayashi ,  Ikuo Kasuga ,  Akira Miyamae

IPC分类号： G11B7/22 ,  G11B7/00

CPC分类号： G11B7/22

摘要： Disclosed is an objective actuator comprising an object lens holder for holding an object lens, the object lens holder being mounted on a support shaft in a manner that the object lens holder is slidable along and rotatable about the support shaft; a drive coil mounted on the object lens holder; first yoke provided with drive magnets, the first yoke being mounted in such manner that the drive magnets confront with the drive coil, the first yoke having a center hole which is larger in diameter than the support shaft, the first yoke and the support shaft are integrally connected by molding; and shaft holding member defined by filling a resin at the center hole of the first yoke, the shaft holding member including a base portion.

摘要翻译： 公开了一种包括用于保持物镜的物镜保持器的物镜致动器，所述物镜保持器以使得所述物镜保持器能够沿所述支撑轴可滑动并且可围绕所述支撑轴旋转的方式安装在支撑轴上; 安装在所述物镜保持器上的驱动线圈; 设置有驱动磁体的第一磁轭，第一磁轭以这样的方式安装，使得驱动磁体与驱动线圈相对，第一磁轭具有直径比支撑轴大的中心孔，第一磁轭和支撑轴是 通过模制一体连接; 以及通过在第一轭的中心孔填充树脂而限定的轴保持构件，该轴保持构件包括基部。

公开(公告)号：US06584061B2

公开(公告)日：2003-06-24

申请号：US09728087

申请日：2000-12-04

申请人： Katsushige Yanagisawa ,  Tohru Hotta ,  Ikuo Kasuga ,  Satoru Kishita

发明人： Katsushige Yanagisawa ,  Tohru Hotta ,  Ikuo Kasuga ,  Satoru Kishita

IPC分类号： G11B700

CPC分类号： G11B7/1356 ,  G11B7/1362 ,  G11B2007/0006

摘要： An optical system of an optical pick-up device 1 comprises a half mirror 13 and a prism 14 which serve to guide a first laser beam L1 for a CD and a second laser beam L2 for a DVD to the optical recording medium side and a common light receiving element 19. The half mirror 13 is set to have a ratio of a reflectance to a transmittance of 5:1 in the first laser beam L1 to be a P polarized light and the prism 14 is set to have a ratio of a reflectance to a transmittance of 1:3 in the first laser beam L2 having a P polarization component and an S polarization component mixed. The first laser beam for a CD can be guided to the optical recording medium without a light quantity loss. At the same time, a return light Lr can be sent in a sufficient light quantity back to the light receiving element 19 for servo signal generation. Therefore, it is possible to implement a reliable CD recording operation by using the first laser beam.

摘要翻译： 光学拾取装置1的光学系统包括半反射镜13和棱镜14，其用于将用于CD的第一激光束L1和用于DVD的第二激光束L2引导到光学记录介质侧，并且公共 受光元件19.半反射镜13被设定为在第一激光束L1中的反射率与5:1的透射率之比为P偏振光，棱镜14被设定为具有反射率 在具有P偏振分量和S偏振分量混合的第一激光束L2中透射率为1:3。 用于CD的第一激光束可以被引导到光学记录介质而没有光量损失。 同时，返回光Lr可以以足够的光量发送回光接收元件19，用于产生伺服信号。 因此，可以通过使用第一激光束来实现可靠的CD记录操作。

公开(公告)号：US4968874A

公开(公告)日：1990-11-06

申请号：US357340

申请日：1989-05-25

申请人： Ikuo Kasuga

发明人： Ikuo Kasuga

IPC分类号： G02B3/02 ,  G02B27/00 ,  G11B7/135

CPC分类号： G11B7/1398 ,  G02B27/0025 ,  G02B3/02 ,  G11B7/1378

摘要： An optical pickup using a parallel plane plate type beam splitter is disclosed, in which the astigmatism produced by the fact that the light beam passes through the beam splitter is compensated by means of a correcting lens having anisotropically curved surfaces.

摘要翻译： 公开了一种使用平行平板式分束器的光学拾取器，其中通过具有各向异性弯曲表面的校正透镜补偿由光束通过分束器的事实产生的象散。

公开(公告)号：US5517362A

公开(公告)日：1996-05-14

申请号：US230105

申请日：1994-04-20

申请人： Ikuo Kasuga ,  Tatuki Wade ,  Akira Miyamae

发明人： Ikuo Kasuga ,  Tatuki Wade ,  Akira Miyamae

IPC分类号： G11B7/12 ,  G11B7/22 ,  G02B7/02

CPC分类号： G11B7/22 ,  G11B7/12

摘要： An optical pickup device operates to irradiate a disk with an optical beam from a light source by an objective lens and to detect the beam reflected from the disk by a light receiving element. A frame is provided for said device having an optical element fixed therein. The frame is formed with a press-fit hole into which the light source is press-fit and fixed so as to adjust the press-fit depth, thereby adjusting alignment between the optical pickup device and the disk.

摘要翻译： 光学拾取装置用于通过物镜照射来自光源的光束并通过光接收元件检测从光盘反射的光束。 为具有固定在其中的光学元件的所述装置提供框架。 框架形成有压配合孔，光源被压入并固定在该压配合孔中，以调节压合深度，从而调节光学拾取装置与盘之间的对准。

公开(公告)号：US4962999A

公开(公告)日：1990-10-16

申请号：US245416

申请日：1988-09-16

申请人： Ikuo Kasuga

发明人： Ikuo Kasuga

IPC分类号： G11B7/085

CPC分类号： G11B7/08582

摘要： An optical pick-up device is disclosed, in which a bearing member for moving it along a guiding shaft is disposed separately and independently from a base plate and the bearing member can be mounted selectively on one side surface or the rear surface of the base plate.

摘要翻译： 公开了一种光拾取装置，其中用于沿着引导轴移动的轴承构件与基板独立地且独立地设置，并且轴承构件可以选择性地安装在基板的一个侧表面或后表面 。

公开(公告)号：US4664476A

公开(公告)日：1987-05-12

申请号：US795704

申请日：1985-11-06

申请人： Ikuo Kasuga

发明人： Ikuo Kasuga

IPC分类号： G02B7/04 ,  G11B7/09 ,  G02B7/02

CPC分类号： G11B7/0929

摘要： A driving apparatus for an objective lens includes an electromagnetic driving device normally holding the objective lens and its support at a neutral position. When a coil of the driving device is energized, the support may be driven so as to pivot about an axis to adjust the position of the lens.

摘要翻译： 用于物镜的驱动装置包括通常将物镜及其支撑件保持在中立位置的电磁驱动装置。 当驱动装置的线圈通电时，可以驱动支撑件以围绕轴线枢转以调节透镜的位置。