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1. 发明专利

JP2008204517A Optical head and optical information recording and reproducing device 审中-公开
标题翻译：光头和光信息记录和再现设备
公开(公告)号：JP2008204517A
公开(公告)日：2008-09-04
申请号：JP2007037292
申请日：2007-02-19
申请人： Hitachi Media Electoronics Co Ltd , 株式会社日立メディアエレクトロニクス
发明人： MORI HIROMITSU , KAWAMURA TOMOHITO , KAMISADA TOSHIMASA
IPC分类号： G11B7/13 , G11B7/09 , G11B7/135
CPC分类号： G11B7/133 , G11B7/0908 , G11B7/131 , G11B7/1353 , G11B7/1376 , G11B7/13925 , G11B2007/0006 , G11B2007/0013
摘要： PROBLEM TO BE SOLVED: To provide an optical head capable of providing a servo signal stable to defocusing and hardly affected by an unnecessary light reflected by a recording surface other than a target in recording and reproducing of an information storage medium having a plurality of information recording surfaces, and an optical information recording and reproducing device mounted therewith. SOLUTION: A light receiving surface 112 of a light detector 109 is composed of a first light receiving surface 503, a second light receiving surface 504, a third light receiving surface 505, a fourth light receiving surface 506 and a fifth light receiving surface 507, with the first light receiving surface having a pattern divided to pentagon or hexagon, and each of the second, third, and fifth light receiving surface having a pattern divided to hexagon. The relation between the diameter of optical beam 509 emitted to each light receiving surface when focused and the size of each light receiving surface is set in a predetermined range. An optical beam multi-dividing element 104 is formed so that optical beams incident on second grating areas A1-D1 and third grating areas E1-H1 are diffracted to a plurality of +1-order lights. Further, the relations of U/D and V/D are set within a predetermined range. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够提供稳定的散焦的伺服信号的光学头，并且在具有多个信息存储介质的信息存储介质的记录和再现中几乎不受由目标之外的记录表面反射的不必要的光的影响的信息记录表面，以及安装在其上的光学信息记录和再现装置。解决方案：光检测器109的光接收表面112由第一光接收表面503，第二光接收表面504，第三光接收表面505，第四光接收表面506和第五光接收表面507，其中第一光接收表面具有分为五边形或六边形的图案，并且第二，第三和第五光接收表面中的每一个具有分为六边形的图案。当聚焦时发射到每个光接收表面的光束509的直径和每个光接收表面的尺寸之间的关系被设定在预定范围内。形成光束多分割元件104，使入射在第二光栅区域A1-D1和第三光栅区域E1-H1上的光束被衍射成多个+ 1级光。此外，U / D和V / D的关系设定在预定范围内。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2008102998A Optical head and optical disk device using the same 有权
标题翻译：光头和光盘装置使用它
公开(公告)号：JP2008102998A
公开(公告)日：2008-05-01
申请号：JP2006283248
申请日：2006-10-18
申请人： Hitachi Media Electoronics Co Ltd , 株式会社日立メディアエレクトロニクス
发明人： KAMISADA TOSHIMASA , KITADA YASUO , YAMAZAKI KAZUYOSHI , KAWAMURA TOMOHITO , KONISHI YOSHIRO
IPC分类号： G11B7/09 , G11B7/13 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To prevent an optical head which can obtain a stable servo signal in recording and reproducing of a multi-layer optical disk. SOLUTION: The optical head is provided with a division element having a plurality of regions. The division element can divide luminous flux reflected by the optical disk into a plurality of luminous flux whose exiting directions are different. When focus is adjusted to the target information recording layer of the optical disk, the reflected luminous flux from the target information recording layer is focused on the light receiving part of a photodetector, then respective regions of the division element and the light receiving part of the photodetector are constituted so that the light receiving part of the photodetector is not irradiated with reflected luminous flux from the information recording layer other than the target information recording layer. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了防止在多层光盘的记录和再现中可以获得稳定的伺服信号的光学头。解决方案：光头设置有具有多个区域的分割元件。分割元件可以将由光盘反射的光束划分为出射方向不同的多个光束。当将焦点调整到光盘的目标信息记录层时，来自目标信息记录层的反射光束聚焦在光电检测器的光接收部分上，然后分割元件和光接收部分的各个区域光电检测器被构造成使得光检测器的光接收部分不被来自信息记录层而不是目标信息记录层的反射光通量照射。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2008102996A Optical pickup and optical disk drive 有权
标题翻译：光学拾取和光盘驱动器
公开(公告)号：JP2008102996A
公开(公告)日：2008-05-01
申请号：JP2006283246
申请日：2006-10-18
申请人： Hitachi Media Electoronics Co Ltd , 株式会社日立メディアエレクトロニクス
发明人： KAWAMURA TOMOHITO , KONISHI YOSHIRO , KAMISADA TOSHIMASA , KITADA YASUO
IPC分类号： G11B7/135
CPC分类号： G11B7/1376 , G11B2007/0006
摘要： PROBLEM TO BE SOLVED: To provide thin optical disk drives for notebook computers compatible with three media of a BD, a DVD and a CD, and an optical pickup to be carried wherein. SOLUTION: The optical pickup arranges a first objective lens and a second objective lens side by side in a radial direction of an optical disk, and arranges the second objective lens to the periphery direction side of the optical disk rather than the first objective lens. When the first collimator lens is arranged to a right-hand side when seeing the second objective lens from the first objective lens, the second collimator lens is arranged to a left-hand side seeing at the first objective lens from the second objective lens, and the distance between the first collimator lens and the first objective lens is made longer than the distance between the second collimator lens and the second objective lens. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供与BD，DVD和CD的三种介质兼容的笔记本电脑的薄型光盘驱动器以及要携带的光学拾取器。解决方案：光学拾取器沿光盘的径向并排布置第一物镜和第二物镜，并将第二物镜布置在光盘的周向侧而不是第一物镜镜片。当从第一物镜观察第二物镜将第一准直透镜布置到右侧时，第二准直透镜布置成从第二物镜观察第一物镜的左侧，并且使得第一准直透镜和第一物镜之间的距离比第二准直透镜和第二物镜之间的距离长。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2008102995A Optical pickup device and optical disk drive 有权
标题翻译：光学拾取器件和光盘驱动器
公开(公告)号：JP2008102995A
公开(公告)日：2008-05-01
申请号：JP2006283245
申请日：2006-10-18
申请人： Hitachi Media Electoronics Co Ltd , 株式会社日立メディアエレクトロニクス
发明人： YAMAZAKI KAZUYOSHI , KAMISADA TOSHIMASA
IPC分类号： G11B7/135 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup which can suppress simultaneously a tracking error signal offset generated in a boundary section of unrecorded and recorded areas and by a displacement of an objective lens, and an optical disk drive thereof. SOLUTION: A luminous flux reflected from a disk is split and detected. A detector has a light receiving part which has areas 1, 2, 3, and 4. Areas 1 and 3 and areas 2 and 4 are axisymmetric to a central axis of the light receiving part. Moreover, the area 1 and the area 2 take a shape to become the breadth in the direction of split line narrow as they are separated from the central axis of the light receiving part in nearly a perpendicular direction. The tracking error signal is detected by four signals acquired from such a detector. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：提供一种能够同时抑制在未记录和记录区域的边界部分中产生的跟踪误差信号偏移以及物镜的位移及其光盘驱动器的光学拾取器。解决方案：从光盘反射的光束被分离和检测。检测器具有区域1,2,3和4的光接收部分。区域1和3以及区域2和4与光接收部分的中心轴线对称。此外，区域1和区域2在从近光垂直方向与光接收部的中心轴分离的状态下，成为分割线方向狭窄的宽度的形状。通过从这种检测器获取的四个信号来检测跟踪误差信号。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2009170087A Optical head and optical disk device equipped with the same 审中-公开
标题翻译：光头和光盘装置配备
公开(公告)号：JP2009170087A
公开(公告)日：2009-07-30
申请号：JP2009062236
申请日：2009-03-16
申请人： Hitachi Media Electoronics Co Ltd , 株式会社日立メディアエレクトロニクス
发明人： KAMISADA TOSHIMASA , KITADA YASUO , YAMAZAKI KAZUYOSHI , KAWAMURA TOMOHITO , KONISHI YOSHIRO
IPC分类号： G11B7/09 , G11B7/13 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical head capable of obtaining a stable servo signal during recording/playback of a multilayer optical disk. SOLUTION: The optical head is provided with a division element 5 having a plurality of areas. The division element 5 is capable of dividing a luminous flux reflected from an optical disk 8 into a plurality of luminous fluxes of different emission directions. Each area of the division element 5 and the light receiving part 13 of a photodetector 12 are configured such that when a focus is adjusted on the target information recording layer of the optical disk 8, a reflected luminous flux from the target information recording layer is focused on the light receiving part 13 of the photodetector 12, while reflected luminous fluxes from information recording layers other than the target information recording layer are not applied to the light receiving part 13 of the photodetector 12. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够在多层光盘的记录/重放期间获得稳定的伺服信号的光学头。解决方案：光头设置有具有多个区域的分割元件5。分割元件5能够将从光盘8反射的光束划分成不同发射方向的多个光束。光检测器12的分割元件5和光接收部分13的每个区域被配置成当在光盘8的目标信息记录层上调整焦点时，来自目标信息记录层的反射光通量被聚焦在光检测器12的光接收部分13上，来自信息记录层以外的来自目标信息记录层的反射光束不被施加到光电检测器12的光接收部分13上。（C）2009， JPO和INPIT

6. 发明专利

JP2008102997A Optical pickup and optical information recording/ reproducing device 有权
标题翻译：光学拾取和光学信息记录/再现设备
公开(公告)号：JP2008102997A
公开(公告)日：2008-05-01
申请号：JP2006283247
申请日：2006-10-18
申请人： Hitachi Media Electoronics Co Ltd , 株式会社日立メディアエレクトロニクス
发明人： MORI HIROMITSU , KAWAMURA TOMOHITO , KONISHI YOSHIRO , KAMISADA TOSHIMASA , KITADA YASUO
IPC分类号： G11B7/125 , G11B7/135
CPC分类号： G11B7/13925 , G11B7/1275 , G11B7/1353 , G11B2007/0006
摘要： PROBLEM TO BE SOLVED: To provide a thin and compact optical pickup wherein space is saved by commonly using a front monitor among three wavelengths in a BD/DVD/CD optical system. SOLUTION: Laser beam sources 101 and 111 for emitting optical beams of three wavelengths are provided, and the optical beam quantities of the three wavelengths are detected by one light quantity monitor element 123. Specifically, one light quantity monitor element is arranged between the first and second laser beam sources 111 and 101, optical beams of wavelengths λ1 and λ2 emitted from the first laser beam source 111 advance almost linearly, and the optical path of an optical beam of a wavelength λ3 emitted from the second laser beam source 101 is obliquely changed to enter the optical beam obliquely to the light receiving surface of one light quantity monitor element 123. The center axis of the light receiving surface of one light quantity monitor element is separated from the emission optical axis of the first laser beam source 111, and a reflecting member 126 is disposed above the emission optical axis of the second laser beam source 101. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种薄而紧凑的光学拾取器，其中通过在BD / DVD / CD光学系统中的三个波长中共同使用前监视器来节省空间。解决方案：提供用于发射三个波长的光束的激光束源101和111，三个波长的光束量由一个光量监测元件123检测。具体地，一个光量监测元件布置在第一和第二激光束源111和101，从第一激光束源111发射的波长λ1和λ2的光束几乎线性地前进，并且从第二激光束源101发射的波长λ3的光束的光路倾斜地变化以使光入射到一个光量监视元件123的受光面上。一个光量监视元件的受光面的中心轴与第一激光光源111的发光光轴分离，并且反射构件126设置在第二激光束源101的发射光轴的上方。版权所有（C）2008，JPO＆INPIT

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