公开(公告)号：US06529465B2

公开(公告)日：2003-03-04

申请号：US09795458

申请日：2001-03-01

申请人： Toshiyuki Kase ,  Hiroshi Nishikawa ,  Wataru Kubo ,  Ryoichi Nakanishi ,  Amit Jain

发明人： Toshiyuki Kase ,  Hiroshi Nishikawa ,  Wataru Kubo ,  Ryoichi Nakanishi ,  Amit Jain

IPC分类号： G11B700

CPC分类号： G11B7/122 ,  G11B7/08564 ,  G11B7/08576 ,  G11B7/1378 ,  G11B11/10543 ,  G11B11/10554 ,  G11B11/10567 ,  G11B11/1058

摘要： Disclosed is an optical system for an optical disk drive for reading/writing data from/in an optical disk. The optical system includes a light source emitting a parallel laser beam, a deflector having a rotatable mirror surface. The parallel laser beam emitted by the light source is incident on the mirror surface of the deflector and is deflected towards an objective lens system which faces the optical disk. A relay lens system is provided between the deflector and the objective lens system such that the mirror surface and a front principal plane of the objective lens system have a substantially conjugate relationship.

摘要翻译： 公开了一种用于从光盘读取/写入数据的光盘驱动器的光学系统。 光学系统包括发射平行激光束的光源，具有可旋转镜面的偏转器。 由光源发射的平行激光束入射在偏转器的镜面上，朝向面向光盘的物镜系统偏转。 在偏转器和物镜系统之间提供中继透镜系统，使得物镜系统的镜面和前主平面具有基本上共轭的关系。

公开(公告)号：US5373437A

公开(公告)日：1994-12-13

申请号：US740726

申请日：1991-08-06

申请人： Tsuyoshi Itoh ,  Isao Okuda ,  Hiroshi Nishikawa ,  Toshiyuki Kase ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

发明人： Tsuyoshi Itoh ,  Isao Okuda ,  Hiroshi Nishikawa ,  Toshiyuki Kase ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

IPC分类号： G02B7/28 ,  G11B7/09 ,  G11B7/095 ,  G11B7/00

CPC分类号： G11B7/0909

摘要： A device in which an offset is added to a focusing error signal to control an objective lens and thereby reduce the generation of cross-talk when a beam spot that is converged on an optical disk crosses over a wall of a groove of a track of the disk. By adding the offset to the focusing error signal, the objective lens is moved out of focus with the disk. Thus, the shape of a beam spot formed on a photo sensor is changed from a circle to an ellipse. A condenser lens provided for forming the beam spot is moved along the optical axis thereof in such a manner that an output of a recorded signal of the disk is at a maximum value. As a result, the objective lens is brought into focus on the disk. Thereafter, the objective lens is focused on the disk in accordance with the focusing error signal to which the offset is added, while maintaining the beam spot in the shape of an ellipse.

摘要翻译： 一种装置，其中偏移量被加到聚焦误差信号上以控制物镜，从而当会聚在光盘上的束斑横跨在光盘的轨道的凹槽的壁上时减少串扰的产生 磁盘。 通过将偏移量加到聚焦误差信号上，物镜与光盘移出对焦。 因此，形成在光传感器上的光斑的形状从圆形变为椭圆形。 设置用于形成束斑的聚光透镜沿其光轴移动，使得盘的记录信号的输出处于最大值。 结果，将物镜聚焦在盘上。 此后，根据添加有偏移量的聚焦误差信号将物镜聚焦在光盘上，同时将光束点保持为椭圆形状。

公开(公告)号：US5751491A

公开(公告)日：1998-05-12

申请号：US677277

申请日：1996-07-09

申请人： Toshiyuki Kase ,  Hiroshi Nishikawa

发明人： Toshiyuki Kase ,  Hiroshi Nishikawa

IPC分类号： G11B7/08 ,  G02B27/62 ,  G11B7/09 ,  G11B7/22 ,  G11B11/105 ,  G02B27/10 ,  G02B7/02

CPC分类号： G02B27/62 ,  G11B7/22 ,  G11B11/10543

摘要： A light beam emitted from a laser diode passes through a polarization beam splitter, a movable mirror, a reference prism supported in a pair of rails, a sliding mirror and is incident on a cat's-eye optical system. The light beam reflected in the cat's-eye optical system returns to the polarization beam splitter along an optical path of the incident light beam, is separated by a polarizing separating plane and is directed to a television camera. The front surface of the reference prism is perpendicular to the rails. Thus, the light beam reflected at the front surface of the reference prism is directed to the television camera along an optical path which is inclined relative to the optical path of the incident light beam in accordance with the direction of the rails. Consequently, if the inclination of the movable mirror is adjusted such that the light spots of both of the reflected beams displayed on the monitor coincide, the optical path of the incident light beam is parallel to the rails.

摘要翻译： 从激光二极管发射的光束通过偏振分束器，可移动反射镜，支撑在一对轨道中的参考棱镜，滑动反射镜并入射到猫眼光学系统。 反射在猫眼光学系统中的光束沿着入射光束的光路返回到偏振分束器，被偏振分离平面分离并被引导到电视摄像机。 参考棱镜的前表面垂直于导轨。 因此，在参考棱镜的前表面处反射的光束沿着相对于入射光束的光路相对于轨道的方向倾斜的光路被引导到电视摄像机。 因此，如果调整可动镜的倾斜度，使得显示在监视器上的两个反射光束的光点重合，则入射光束的光路平行于轨道。

公开(公告)号：US5790501A

公开(公告)日：1998-08-04

申请号：US939097

申请日：1997-09-26

申请人： Toshiyuki Kase ,  Hiroshi Nishikawa

发明人： Toshiyuki Kase ,  Hiroshi Nishikawa

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B7/22 ,  G11B11/105

CPC分类号： G11B7/1356 ,  G11B11/10543

摘要： A laser beam emitted from a laser diode passes through a polarizing separating plane of a first polarization beam splitter and forms a beam spot on a magneto-optic disk. The plane of polarization of the laser beam that is reflected at a magnetic film provided on the magneto-optic disk is rotated by the Kerr effect in a fixed direction depending on the direction of magnetization of the magnetic film. The reflected laser beam is made incident on the polarizing separating plane of the first polarization beam splitter. The angle of the polarizing separating plane of the first polarization beam splitter is adjusted with respect to an optic path of the laser beam so that the P polarization component of the laser beam is reflected by 20%.

摘要翻译： 从激光二极管发射的激光束通过第一偏振分束器的偏振分离平面并在磁光盘上形成束斑。 在设置在磁光盘上的磁性膜上反射的激光束的偏振平面根据磁性膜的磁化方向在固定方向旋转克尔效应。 反射的激光束入射到第一偏振分束器的偏振分离平面上。 相对于激光束的光路来调整第一偏振分束器的偏振分离面的角度，使得激光束的P偏振分量反射20％。

公开(公告)号：US5740147A

公开(公告)日：1998-04-14

申请号：US685973

申请日：1996-07-22

申请人： Toshiyuki Kase ,  Hiroshi Nishikawa

发明人： Toshiyuki Kase ,  Hiroshi Nishikawa

IPC分类号： G11B11/10 ,  G11B7/135 ,  G11B11/105 ,  G11B7/95 ,  G11B19/02

CPC分类号： G11B7/1365 ,  G11B11/10543

摘要： A laser beam emitted from a laser diode passes through a first polarization beam splitter to form a spot on a magnetic film of a magneto-optic disk. The plane of polarization of the laser beam reflected at the magneto-optic disk rotates, due to the Kerr effect, in a fixed direction in accordance with the direction of magnetization of the magnetic film. The laser beam then passes through a half-wave plate. The half-wave plate is attached on a base plate and tilted with respect to the optical axis of the laser beam so that its phase difference along the optical axis compensates the phase difference of the entire optic system. The laser beam passed through the half-wave plate is separated by the second beam splitter into a P polarization component and S polarization component, which are respectively detected by photodiodes.

摘要翻译： 从激光二极管发射的激光束通过第一偏振分束器以在磁光盘的磁性膜上形成点。 在磁光盘反射的激光束的偏振平面由于克尔效应而沿固定方向旋转，这与磁性膜的磁化方向一致。 然后激光束通过半波片。 半波片安装在基板上并相对于激光束的光轴倾斜，使得其沿光轴的相位差补偿整个光学系统的相位差。 通过半波片的激光束由第二分束器分离成分别由光电二极管检测的P偏振分量和S偏振分量。

公开(公告)号：US5553052A

公开(公告)日：1996-09-03

申请号：US204655

申请日：1994-08-02

申请人： Masahiro Oono ,  Hisashi Konno ,  Toshiyuki Kase ,  Katsuki Hayashi ,  Hiroshi Nishikawa

发明人： Masahiro Oono ,  Hisashi Konno ,  Toshiyuki Kase ,  Katsuki Hayashi ,  Hiroshi Nishikawa

IPC分类号： G11B7/095 ,  G11B7/22 ,  G11B11/105 ,  G11B7/00 ,  G02B7/00

CPC分类号： G11B7/0956 ,  G11B11/1055 ,  G11B7/22

摘要： A detecting apparatus which detects an inclination of an objective lens relative to a reference surface is provided. The objective lens is part of an optical data recording and reproducing apparatus in which data is optically recorded on and reproduced from a recording medium which is placed parallel to the reference surface. The apparatus includes a transparent parallel plate which is opposite the objective lens, parallel to the reference surface, and made of a material that is substantially optically equivalent to a transparent material of the recording medium. The apparatus further includes a reflecting mechanism for reflecting coherent light which has passed through the objective lens and the transparent parallel plate back towards the transparent parallel plate and the objective lens, and a beam splitting mechanism for splitting the coherent light into a first beam and a second beam. The apparatus further includes a wavefront rotating mechanism for rotating the first beam and the second beam about an optical axis in a manner such that the first beam and the second beam are rotated through 180 degrees with respect to one another, and a mechanism for superposing the first beam and the second beam to produce an optical interference.

摘要翻译： 提供一种检测物镜相对于基准面的倾斜度的检测装置。 物镜是光学数据记录和再现装置的一部分，其中数据被光记录在与参考表面平行放置的记录介质上并再现。 该装置包括与物镜相对的透明平行板，平行于参考表面，并且由基本上光学上相当于记录介质的透明材料的材料制成。 该装置还包括反射机构，用于将已经通过物镜的相干光和透明平行板反射回透明平行板和物镜，以及分束机构，用于将相干光分解为第一光束和 第二束。 该装置还包括波前旋转机构，用于以第一光束和第二光束相对于彼此旋转180度的方式围绕光轴旋转第一光束和第二光束;以及机构， 第一光束和第二光束产生光学干涉。

公开(公告)号：US5297114A

公开(公告)日：1994-03-22

申请号：US800846

申请日：1991-11-29

申请人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryoto Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki ,  Isao Takahashi

发明人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryoto Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki ,  Isao Takahashi

IPC分类号： G11B7/09 ,  G11B7/00

CPC分类号： G11B7/094

摘要： In the magneto-optic recording/reproduction apparatus, a light beam from a semiconductor laser that can be used with two wavelengths, for recording and reproduction is converged by an objective lens on a magneto-optic disk, a predetermined offset is added to this focusing error signal by an offset adjusting circuit, and the objective lens is driven in the direction of the optical axis based on the focusing error signal to which an offset was added.

摘要翻译： 在磁光记录/再现装置中，来自可用于记录和再现的两个波长的半导体激光器的光束被物镜会聚在磁光盘上，预定的偏移被加到该聚焦 通过偏移调整电路的误差信号，并且基于添加有偏移的聚焦误差信号，物镜在光轴的方向上被驱动。

公开(公告)号：US5280464A

公开(公告)日：1994-01-18

申请号：US741620

申请日：1991-08-07

申请人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

发明人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

IPC分类号： G11B11/10 ,  G11B7/09 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/0909 ,  G11B7/1365 ,  G11B7/13922

摘要： An optical system of an optical disk apparatus having plural optical elements characterized in that the optical element having aberration which can counterbalance the wave front aberration of the whole optical system is disposed, or a direction of aberration of each existing optical element is adjusted in order to correct the wave front aberration.

摘要翻译： 具有多个光学元件的光盘装置的光学系统，其特征在于，具有能够抵消整个光学系统的波面像差的像差的光学元件被设置，或者调整每个现有光学元件的像差方向，以便 纠正波前像差。

公开(公告)号：US06411588B1

公开(公告)日：2002-06-25

申请号：US09152329

申请日：1998-09-14

申请人： Toshiyuki Kase ,  Hiroshi Nishikawa

发明人： Toshiyuki Kase ,  Hiroshi Nishikawa

IPC分类号： G11B700

CPC分类号： G11B7/133 ,  G11B7/1263 ,  G11B7/1374 ,  G11B7/1381

摘要： Disclosed is an optical data recording/reproducing device which is provided with a laser diode for emitting laser beam, an illuminating optical system including an objective lens which converges the laser beam emitted by the laser diode on an optical disc, a monitoring optical system including a light receiving element which receives a part of the laser beam emitted by the laser diode, and a driving circuit which drives the laser diode in accordance with an output signal of the light receiving element. A coupling efficiency of the illuminating optical system and a coupling efficiency of the monitoring optical system are made substantially the same.

摘要翻译： 公开了一种设置有用于发射激光束的激光二极管的光学数据记录/再现装置，包括将由激光二极管发射的激光束会聚在光盘上的物镜的照明光学系统，包括 接收由激光二极管发射的激光束的一部分的光接收元件，以及根据光接收元件的输出信号来驱动激光二极管的驱动电路。 照明光学系统的耦合效率和监视光学系统的耦合效率基本上相同。

公开(公告)号：US5917599A

公开(公告)日：1999-06-29

申请号：US899332

申请日：1997-07-23

申请人： Hiroshi Nishikawa ,  Toshiyuki Kase

发明人： Hiroshi Nishikawa ,  Toshiyuki Kase

IPC分类号： G01B11/27 ,  G01B9/02

CPC分类号： G01B11/27

摘要： A lens inclination adjustment system includes an interferometer unit, an inclination adjusting unit and a data processing unit. The data processing unit compares data of the interference fringes generated by the interferometer with predetermined image data to determine inclination status of the lens. Thereafter, in the adjusting unit, the current inclination status of the lens is detected. The data processing unit then calculates a target position to which the inclination status of the lens should be adjusted, and displays a position indicating the current inclination status and the target position on a screen.

摘要翻译： 透镜倾斜调节系统包括干涉仪单元，倾斜调节单元和数据处理单元。 数据处理单元将由干涉仪产生的干涉条纹的数据与预定的图像数据进行比较，以确定透镜的倾斜状态。 此后，在调整单元中，检测透镜的当前倾斜状态。 数据处理单元然后计算应该调整透镜的倾斜状态的目标位置，并且在屏幕上显示指示当前倾斜状态和目标位置的位置。