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1. 发明授权

US5363353A Magneto-optical disk drive having multiple electromagnet elements 失效
标题翻译：具有多个电磁元件的磁光盘驱动器
公开(公告)号：US5363353A
公开(公告)日：1994-11-08
申请号：US124762
申请日：1993-09-22
申请人： Young-woong Kim , Ick-hyoung Yoo , Chul-woo Lee
发明人： Young-woong Kim , Ick-hyoung Yoo , Chul-woo Lee
IPC分类号： G11B11/10 , G11B7/08 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10552 , G11B11/10536
摘要： An magneto-optical disk drive comprises a driving apparatus for rotating a medium, an electromagnet positioned above or below the medium for producing a magnetic field on a recording surface of the medium, and an optical head by which laser light illuminates the recording surface and the laser light reflected from the recording surface is picked up. Here, the electromagnet comprises a plurality of subdivided electromagnet elements, a magnetic field concentrator by combining the electromagnet elements in a magnetic circuit and concentrating magnetic fields produced from the combined electromagnet elements on a portion of the electromagnet, and a center magnetic pole provided in an opposing position with respect to the optical head, to thereby make the magnetic field concentrated by the magnetic field concentrator pass through the recording surface of the medium. Accordingly, the recording time or data on the medium becomes greatly shortened, thereby enabling high speed data recording.
摘要翻译：磁光盘驱动器包括用于旋转介质的驱动装置，位于介质上方或下方的电磁体，用于在介质的记录表面上产生磁场，以及激光照射记录表面的光学头拾取从记录表面反射的激光。这里，电磁体包括多个细分电磁体元件，磁场集中器通过组合磁路中的电磁体元件和从电磁体的一部分上的组合电磁元件产生的集中磁场，以及设置在电磁体中的中心磁极相对于光头相对的位置，由此使得由磁场聚集器集中的磁场通过介质的记录表面。因此，介质上的记录时间或数据变得大大缩短，从而能够进行高速数据记录。

2. 发明授权

US5383173A Optical pick-up utilizing a phase diffraction grating for diffracting reflected light in two directions 失效
$Optical pick-up utilizing a phase diffraction grating for diffracting reflected light in two directions$
标题翻译：光拾取器利用相位衍射光栅在两个方向衍射反射光
公开(公告)号：US5383173A
公开(公告)日：1995-01-17
申请号：US40008
申请日：1993-03-30
申请人： Young-woong Kim , Chul-woo Lee
发明人： Young-woong Kim , Chul-woo Lee
IPC分类号： G11B7/135 , G11B11/10 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10543
摘要： An optical pickup for recording and reproducing information via a magneto-optical disk comprises a phase-diffraction grating which is diffracted in two directions perpendicular to each other on a plane perpendicular to a beam axis. The diffracted light of the phase-diffraction grating has a different phase for each direction, and the phases are varied according to the polarization angle which is rotated by the Kerr effect of the magneto-optical disk. The reproduction signal is detected using the intensity variation of the diffracted light of the two directions due to the phase change. Also, the focus error signal according to the oscillation of the magneto-optical disk is detected by condensing the diffracted light of the phase-diffraction grating by means of the condensing lens and using the amplitude change of the diffracted light. Such an optical pickup is not affected by the variation of the light quantity, thereby contributing to clear reproduction and the enhancement of the signal-to-noise ratio.
摘要翻译：用于通过磁光盘记录和再现信息的光学拾取器包括在垂直于光束轴线的平面上彼此垂直的两个方向衍射的相位衍射光栅。相位衍射光栅的衍射光对于各个方向具有不同的相位，并且根据由磁光盘的克尔效应旋转的偏振角而改变相位。使用由于相变引起的两个方向的衍射光的强度变化来检测再现信号。此外，根据磁光盘的振荡的聚焦误差信号通过聚光透镜使衍射光栅的衍射光聚光并利用衍射光的振幅变化来检测。这样的光学拾取器不受光量的变化的影响，从而有助于清除再现和提高信噪比。

3. 发明授权

US5650986A Optical pickup driving apparatus for an optical disk drive 失效
标题翻译：光盘驱动器用光拾取驱动装置
公开(公告)号：US5650986A
公开(公告)日：1997-07-22
申请号：US583936
申请日：1996-01-11
申请人： Chul-woo Lee , Young-woong Kim
发明人： Chul-woo Lee , Young-woong Kim
IPC分类号： G11B7/085 , G11B7/09
CPC分类号： G11B7/08582 , G11B7/0932 , G11B7/0935 , G11B7/093
摘要： An optical pickup driving apparatus includes a carriage for a moving portion having an objective lens, a feeding motor having a moving coil for supporting the carriage, a magnet for producing a magnetic linked flux to the moving coil and a yoke member for controlling the magnetic path of the magnetic flux and movably supporting the moving coil, and a plurality of coils for minutely moving the objective lens vertically and horizontally in response to the magnet of the feeding motor. By reducing the weight of the moving portion mounted on the carriage, the feeding motor has a rapid response characteristic and therefore the optical pickup can search for information at high speed.
摘要翻译：一种光学拾取器驱动装置，包括：具有物镜的移动部分的托架，具有用于支撑托架的运动线圈的馈送马达，用于产生到运动线圈的磁性链的磁铁;以及用于控制磁路的磁轭件的磁通量并且可移动地支撑运动线圈，以及多个线圈，用于响应于馈送电机的磁体而垂直和水平地微小地移动物镜。通过减小安装在滑架上的移动部分的重量，馈送电机具有快速响应特性，因此光学拾取器可以高速搜索信息。

4. 发明授权

US5374819A Optical head having a beam cutting mirror with a total absorption surface 失效
标题翻译：具有具有全吸收表面的光束切割镜的光学头
公开(公告)号：US5374819A
公开(公告)日：1994-12-20
申请号：US124761
申请日：1993-09-22
申请人： Young-woong Kim , Chul-woo Lee
发明人： Young-woong Kim , Chul-woo Lee
IPC分类号： G11B7/08 , G11B7/09 , G11B7/135 , G11B11/10 , G11B11/105 , G01J1/20
CPC分类号： G11B7/1362
摘要： An optical head which optically reads and writes signals recorded on a recording medium comprises a beam cutting mirror provided to the rear of a beam splitter and having a total reflection surface, a total absorption surface, and a polarizing surface, and a photodetector detecting incident beams. Since the photodetector and the light source are provided on two parallel light source, the optical head of the present invention can use a laser beam detector and a photodetector for detecting focussing signals, tracking signals, and information signals as one package, so as to bring a rapid improvement in miniaturization, lightweight, and compaction.
摘要翻译：光学读取和写入记录在记录介质上的信号的光学头包括设置在分束器后部的具有全反射表面，全吸收表面和偏振表面的光束切割镜，以及检测入射光束。由于光电检测器和光源设置在两个平行的光源上，本发明的光头可以使用激光束检测器和用于检测聚焦信号，跟踪信号和信息信号作为一个封装的光电检测器，以便带来小型化，轻量化和压实快速改进。

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