公开(公告)号：US6025866A

公开(公告)日：2000-02-15

申请号：US64032

申请日：1998-04-22

申请人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada ,  Katsutoshi Hibino ,  Shigeki Hori

发明人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada ,  Katsutoshi Hibino ,  Shigeki Hori

IPC分类号： G11B11/10 ,  G02B27/58 ,  G11B7/00 ,  G11B7/005 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  B41J2/47

CPC分类号： B82Y10/00 ,  G02B27/58 ,  G11B11/10543 ,  G11B7/1365

摘要： An optical pickup apparatus including a polarization plane rotary unit arranged between a semiconductor laser and an objective lens, and a polarizing film arranged between the polarization plane rotary unit and the objective lens. The polarization plane rotary unit includes liquid crystal, two glass plates sandwiching the liquid crystal, and transparent electrodes patterned to a predetermined configuration on an inner face of these glass planes. The polarization plane rotary unit permits passage of the laser beam without rotating the plane of polarization of the entire laser beam at the time of recording, and permits passage of the laser beam with the plane of polarization of the center portion of the laser beam rotated and the plane of polarization of the remaining outer portion of the laser beam not rotated at the time of reproduction. Only the outer portion of the laser beam is focused on a magneto-optical disk in a reproduction mode, so that a main beam of a small spot is formed by mutual interference. Since the plane of polarization of the laser beam directed on the magneto-optical disk is not rotated, the Kerr angle of rotation can be detected at high accuracy. As a result, the reproducibility is improved.

摘要翻译： 一种包括设置在半导体激光器和物镜之间的偏振面旋转单元的光拾取装置，以及配置在偏振面旋转单元与物镜之间的偏振膜。 偏振面旋转单元包括液晶，夹着液晶的两个玻璃板以及在这些玻璃平面的内表面上被图案化成预定构造的透明电极。 在记录时，偏振面旋转单元允许激光束的通过而不旋转整个激光束的偏振平面，并且允许激光束与激光束的中心部分的偏振平面一起旋转，并且 在再现时激光束的剩余外部部分的偏振面不转动。 只有激光束的外部部分在再现模式下聚焦在磁光盘上，使得通过相互干扰形成小光斑的主光束。 由于朝向磁光盘的激光束的偏振面不旋转，因此可以高精度地检测克尔角的旋转角度。 结果，再现性提高。

公开(公告)号：US5870371A

公开(公告)日：1999-02-09

申请号：US935969

申请日：1997-09-23

申请人： Yoichi Tsuchiya ,  Seiji Kajiyama

发明人： Yoichi Tsuchiya ,  Seiji Kajiyama

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/09 ,  G11B7/135

CPC分类号： G11B7/0933 ,  G11B7/0935 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B7/0037

摘要： An optical pickup device includes two objective lenses having numerical apertures different from each other, a lens holder for holding these objective lenses in common, a cylinder fixed to the lens holder, and four tracking coil pairs affixed onto a cylindrical surface of the cylinder. Two tracking coil pairs are displaced from the remaining two tracking coil pairs by a predetermined angle. When one objective lens is used, two tracking coil pairs corresponding to the objective lens are used for tracking control of the objective lens. The remaining two tracking coil pairs are used for positioning control of the objective lens.

摘要翻译： 光学拾取装置包括具有彼此不同数量孔径的两个物镜，用于共同保持这些物镜的透镜保持架，固定到透镜保持器的圆柱体和固定在圆柱体的圆柱形表面上的四个跟踪线圈对。 两个跟踪线圈对从剩余的两个跟踪线圈对移位预定角度。 当使用一个物镜时，对应于物镜的两个追踪线圈对用于跟踪物镜的控制。 剩余的两个跟踪线圈对用于物镜的定位控制。

公开(公告)号：US5687154A

公开(公告)日：1997-11-11

申请号：US578501

申请日：1995-12-26

申请人： Yoichi Tsuchiya ,  Seiji Kajiyama

发明人： Yoichi Tsuchiya ,  Seiji Kajiyama

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/09 ,  G11B7/135

CPC分类号： G11B7/0933 ,  G11B7/0935 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B7/0037

摘要： An optical pickup device includes two objective lenses having numerical apertures different from each other, a lens holder for holding these objective lenses in common, a cylinder fixed to the lens holder, and four tracking coil pairs affixed onto a cylindrical surface of the cylinder. Two tracking coil pairs are displaced from the remaining two tracking coil pairs by a predetermined angle. When one objective lens is used, two tracking coil pairs corresponding to the objective lens are used for tracking control of the objective lens. The remaining two tracking coil pairs are used for positioning control of the objective lens.

摘要翻译： 光学拾取装置包括具有彼此不同数量孔径的两个物镜，用于共同保持这些物镜的透镜保持架，固定到透镜保持器的圆柱体和固定在圆柱体的圆柱形表面上的四个跟踪线圈对。 两个跟踪线圈对从剩余的两个跟踪线圈对移位预定角度。 当使用一个物镜时，对应于物镜的两个追踪线圈对用于跟踪物镜的控制。 剩余的两个跟踪线圈对用于物镜的定位控制。

公开(公告)号：US20070115767A1

公开(公告)日：2007-05-24

申请号：US11598565

申请日：2006-11-14

申请人： Kenji Nagatomi ,  Seiji Kajiyama

发明人： Kenji Nagatomi ,  Seiji Kajiyama

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/1369 ,  G11B7/13925

摘要： A wavefront of a laser light is adjusted using a phase correcting element. The phase correcting element includes an electrode layer, an electrode layer arranged facing the former electrode layer, orientation films arranged on a surface facing the electrode layers, and a liquid crystal layer filled between the orientation films. One of the two electrode layers is formed with an electrode pattern (ring shaped electrode) for providing a spherical aberration correcting effect to the laser light within a constant distance from a center of a beam incident diameter, and a continuous electrode is arranged on an outer side thereof. Occurrence of the aberration by a lens shift is effectively suppressed by omitting electrodes arranged slightly on an inner side of the conventional beam incident diameter.

摘要翻译： 使用相位校正元件调整激光的波前。 相位校正元件包括电极层，与前一电极层相对配置的电极层，配置在与电极层相对的表面上的取向膜以及填充在取向膜之间的液晶层。 两个电极层中的一个形成有电极图案（环形电极），用于在距离入射直径的中心恒定的距离内为激光提供球面像差校正效果，并且连续电极设置在外部 侧。 通过省略稍微布置在常规光束入射直径的内侧上的电极，可以有效地抑制透镜偏移的像差的发生。

公开(公告)号：US06438097B1

公开(公告)日：2002-08-20

申请号：US09487867

申请日：2000-01-20

申请人： Seiji Kajiyama ,  Youichi Tsuchiya ,  Kenji Torazawa ,  Kouichi Tada

发明人： Seiji Kajiyama ,  Youichi Tsuchiya ,  Kenji Torazawa ,  Kouichi Tada

IPC分类号： G11B724

CPC分类号： G11B23/281 ,  G11B7/24 ,  G11B7/24085 ,  G11B7/261 ,  G11B20/00086 ,  G11B23/284

摘要： Micro-pits or micro-pit strings, which are disabled precise copying by means of illegal copying described above and enable signals different from signals of a normal disc to be detected in case of failure in precise copying, are recorded in a copy protected area of an optical disc beforehand. A read unit checks the copy protected area and determines a loaded disc is legal disc or illegally copied disc. If illegal, reading is prohibitted.

摘要翻译： 通过上述非法复制而禁止精确复制的微凹坑或微凹坑串被记录在复制保护区域的复制保护区域中，并且使得在精确复制失败的情况下能够检测到与普通盘的信号不同的信号被检测到 光盘。 读取单元检查复制保护区域，并确定加载的光盘是合法光盘或非法复制光盘。 如果非法，阅读被禁止。

公开(公告)号：US06262967B1

公开(公告)日：2001-07-17

申请号：US09487866

申请日：2000-01-20

申请人： Seiji Kajiyama ,  Youichi Tsuchiya ,  Kenji Torazawa ,  Kouichi Tada

发明人： Seiji Kajiyama ,  Youichi Tsuchiya ,  Kenji Torazawa ,  Kouichi Tada

IPC分类号： G11B724

CPC分类号： G11B23/281 ,  G11B7/24 ,  G11B7/24085 ,  G11B7/261 ,  G11B20/00086 ,  G11B23/284

摘要： An illegal disc copying protection system which includes an optical disc with recorded information as a series of pits aligned to a track direction from the optical disc, a recording system which records information as a series of pits aligned to the track direction from the optical disc, and a reading system which reads information being recorded as a series of pits aligned to the track direction from the optical disc.

摘要翻译： 一种非法盘片复制保护系统，其包括具有记录信息的光盘作为与光盘的轨道方向对齐的一系列凹坑;记录系统，其将信息作为与光盘方向对准的一系列凹坑记录， 以及读取系统，其读取被记录为与光盘对准的轨道方向的一系列凹坑的信息。

公开(公告)号：US07525897B2

公开(公告)日：2009-04-28

申请号：US11290505

申请日：2005-12-01

申请人： Kenji Nagatomi ,  Seiji Kajiyama

发明人： Kenji Nagatomi ,  Seiji Kajiyama

IPC分类号： G11B7/00

CPC分类号： H01S5/022 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/1398 ,  G11B2007/0006 ,  G11B2007/13727 ,  H01S5/005 ,  H01S5/02212 ,  H01S5/4031 ,  H01S5/4043 ,  H01S5/4087

摘要： Provided is an optical pickup device in which the deterioration of optical characteristics of a laser light beam due to a deviation of an optical axis can be smoothly suppressed with a simple structure. An objective lens becomes a finite system for only a laser light beam for CD (780 nm in wavelength). A three-wavelength laser is disposed such that an optical axis of the laser light beam for CD is aligned with an optical axis of an optical system including a polarization BS to an optical axis correcting element. In this case, the large deterioration of the optical properties of the laser light beam for CD, which cannot be sufficiently compensated even if the objective lens is tilted, does not occur. A stable recording and reproducing operation using the laser light beam for CD can be performed. At this time, although an optical axis of a laser light beam for DVD and an optical axis of a laser light beam for next-generation DVD are deviated from an optical axis of the optical system, the laser light beams are incident on the objective lens as infinite system light beams, so the deterioration of the optical properties due to the deviation can be suppressed by tilting the objective lens.

摘要翻译： 提供一种光拾取装置，其中可以以简单的结构平滑地抑制由于光轴的偏离导致的激光束的光学特性的劣化。 物镜成为仅用于CD的激光束（波长为780nm）的有限系统。 三波长激光器被设置为使得用于CD的激光束的光轴与包括偏振BS的光学系统的光轴对准光轴校正元件。 在这种情况下，不会发生即使物镜倾斜也不能充分补偿的用于CD的激光束的光学特性的大的劣化。 可以执行使用用于CD的激光束的稳定的记录和再现操作。 此时，虽然用于DVD的激光束的光轴和用于下一代DVD的激光的光轴偏离光学系统的光轴，但是激光入射到物镜 作为无限系统光束，因此可以通过倾斜物镜来抑制由于偏差导致的光学特性的劣化。

公开(公告)号：US07420894B2

公开(公告)日：2008-09-02

申请号：US11201293

申请日：2005-08-11

申请人： Kenji Nagatomi ,  Seiji Kajiyama

发明人： Kenji Nagatomi ,  Seiji Kajiyama

IPC分类号： G11B7/20 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B2007/0006

摘要： Provided is an optical pickup device whose optical axis adjustment can be performed while an increase in cost is suppressed and whose optical axis correction can be accurately performed even when a variation in arrangement between laser elements occurs. The optical pickup device includes a semiconductor 101 that houses at least three laser elements having at least three different emission wavelengths in a single package, and first and second diffraction gratings 102 and 111 for substantially matching optical axes of lasers emitted from the laser elements with the optical axis of the reference laser beam by a diffraction effect. The first diffraction grating 102 matches an optical axis of a laser beam for CD (780 nm in wavelength) with the reference optical axis by a diffraction effect. The second diffraction grating 111 matches an optical axis of a laser beam for DVD (655 nm in wavelength) with the reference optical axis by a diffraction effect. Even when a variation occurs in a light emitting point gap between the laser elements, by performing fine adjustment of the corresponding diffraction grating in the reference optical axis direction, the optical axis of the laser beam can be adjusted.

摘要翻译： 提供了一种光学拾取装置，其可以在抑制成本增加的同时进行光轴调节，并且即使当发生激光元件之间的布置的变化时也可以精确地执行其光轴校正。 光学拾取装置包括半导体101，其在单个封装中容纳至少三个具有至少三个不同发射波长的激光元件;以及第一和第二衍射光栅102和111，用于将激光元件发射的激光的光轴与 通过衍射效应的参考激光束的光轴。 第一衍射光栅102通过衍射效应将用于CD（780nm波长）的激光束的光轴与参考光轴匹配。 第二衍射光栅111通过衍射效应将用于DVD的激光束（波长为655nm）的光轴与参考光轴匹配。 即使当在激光元件之间的发光点间隙发生变化时，通过在参考光轴方向上对相应的衍射光栅执行微调，可以调节激光束的光轴。

公开(公告)号：US20070147198A1

公开(公告)日：2007-06-28

申请号：US11642730

申请日：2006-12-21

申请人： Kenji Nagatomi ,  Seiji Kajiyama

发明人： Kenji Nagatomi ,  Seiji Kajiyama

IPC分类号： G11B7/00

CPC分类号： G11B7/13 ,  G11B7/0935 ,  G11B7/1374 ,  G11B2007/0006

摘要： An optical pickup device is provided, in which, supposing that an angle formed by the meeting of a straight line connecting a center of an optical disk and an accessing position of an HD objective lens with a diameter L of the optical disk is a track angle θ1, an oscillation angle α of an optical system including an HD laser, an HD half mirror, and an HD sensor, and a distance z of the HD objective lens are set so as to satisfy α−(θ1max+θ1min)/2=±45°, where θ1max is the track angle θ1 when the HD objective lens is positioned at an innermost circumference of the optical disk, and θ1min is the track angle θ1 when the HD objective lens is positioned at an outermost circumference of the optical disk.

摘要翻译： 提供了一种光学拾取装置，其中，假设由连接光盘中心的直线与具有光盘直径L的HD物镜的访问位置的会合形成的角度是轨道角度 θ1，包括HD激光器，HD半反射镜和HD传感器的光学系统的振荡角α和HD物镜的距离z被设置为满足α-（θ1 max +θ1 min）/ 2 =±45°，其中θ1 max是当HD物镜位于光盘的最内周边时的轨迹角θ1，θ1 min是当HD物镜为 位于光盘的最外周。

公开(公告)号：US20060083147A1

公开(公告)日：2006-04-20

申请号：US11218783

申请日：2005-09-06

申请人： Kenji Nagatomi ,  Seiji Kajiyama ,  Tetsuhisa Hosokawa

发明人： Kenji Nagatomi ,  Seiji Kajiyama ,  Tetsuhisa Hosokawa

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/1353 ,  G11B2007/0006

摘要： Provided is an optical pickup device capable to suppress an occurrence of an aberration on a recording medium and a decrease of power of laser beams while employing a diffraction grating as an optical axis correction element. The laser element emitting the laser beam for CD (780 nm in wavelength) is disposed between the laser element emitting the laser beam for next-generation DVD (405 nm in wavelength) and the laser element emitting the laser beam for DVD (650 nm in wavelength). Only the laser beam for DVD is aligned by a diffraction effect of the optical axis correction element (diffraction grating) with the optical axis of the laser beam for next generation DVD. It is possible that a decrease of laser power due to diffraction efficiency is suppressed as much as possible because only the optical axis of the laser beam for DVD is aligned with the optical axis of the laser beam for next-generation DVD. Also it is possible that the optical axis of the laser beam for CD not subjected to the optical axis correction is brought close to the optical axis of laser beam for next-generation DVD considerably, thereby an aberration occurring in the laser beam for CD can be suppressed at minimum level.