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1. 发明专利

JP2009087402A Optical pickup and drive incorporating it 有权
标题翻译：光学摄像机和驱动器
公开(公告)号：JP2009087402A
公开(公告)日：2009-04-23
申请号：JP2007252291
申请日：2007-09-27
申请人： Sharp Corp , シャープ株式会社
发明人： MIYAZAKI OSAMU
IPC分类号： G11B7/135 , G11B7/09 , G11B7/24
CPC分类号： G11B7/0901 , G11B7/094 , G11B7/131
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup and a drive incorporating it, which can minimize the effect of stray light caused by the light reflected on the surface of a light transmission layer of an optical recording medium and make correct focusing and tracking even when using an optical recording medium having a thin light transmission layer. SOLUTION: The second photo detectors 111e-111h or third photo detectors 111i-111p receiving the ±first order diffracted light from a polarized hologram 110 are arranged outside the circular area of a radius (2×t/n)×(f2/f1) centering on the optical axis of the zeroth-order diffracted light on an optical detector 112, where the focal length of an objective lens 105 is represented by f1, the focal length of a coupling lens 102 by f2, the maximum thickness of the light transmission layer by t, and the refractive index of the light transmission layer 104c by n. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种光拾取器及其结合的驱动器，其可以最小化由在光记录介质的光透射层的表面上反射的光引起的杂散光的影响，并进行正确的聚焦和即使当使用具有薄光透射层的光记录介质时也是如此。解决方案：接收来自偏振全息图110的±一级衍射光的第二光检测器111e-111h或第三光检测器111i-111p布置在半径（2×t / n）×（f2 / f1），其中物镜105的焦距由f1表示，耦合透镜102的焦距为f2，光学检测器112的最大厚度光透射层乘以t，透光层104c的折射率乘以n。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2008135123A Optical pickup device 审中-公开
标题翻译：光学拾取器件
公开(公告)号：JP2008135123A
公开(公告)日：2008-06-12
申请号：JP2006320719
申请日：2006-11-28
申请人： Sharp Corp , シャープ株式会社
发明人： TSUCHIDA KAZUHIRO , MATSUBARA KAZUNORI , WATANABE YUKIO , MURAKAMI SHINZO , KAMIYAMA TETSUO , MIYAZAKI OSAMU
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device capable of obtaining a stable servo signal. SOLUTION: First to fourth separating sections 71 to 74 for tracking are formed in first to fourth divided regions 71a to 74a of a light separating means 45 respectively so as to deviate from the diffracted light passing region where the diffracted light reflected and diffracted by a recording layer 41b on the side deeper than the recording layer 41a on the light source side viewed from the light source 4 when the light beam is condensed to the recording layer 41a on the light source side. In first to fourth detection sections 91 to 94 for tracking, the light diffracted and separated by the first to fourth separating sections 71 to 74 for tracking is detected. A tracking error signal is obtained by a phase difference between a change in the addition value of light intensity detected by the first and fourth detection sections 91 and 94 for tracking and a change in the addition value of light intensity detected by the second and third detection sections 92 and 93 for tracking. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供能够获得稳定的伺服信号的光学拾取装置。解决方案：分别在光分离装置45的第一至第四分割区域71a至74a中分别形成用于跟踪的第一至第四分离部分71至74，以偏离衍射光衍射的衍射光通过区域当光束被聚光到光源侧的记录层41a时，从光源4观察，在比光源侧的记录层41a更深的一侧的记录层41b。在用于跟踪的第一至第四检测部分91至94中，检测由用于跟踪的第一至第四分离部分71至74衍射和分离的光。通过由第一和第四检测部分91和94检测的用于跟踪的光强度的相加值的变化和由第二和第三检测检测到的光强度的相加值的变化之间的相位差获得跟踪误差信号第92和93节用于跟踪。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2008004149A The optical pickup device 审中-公开
标题翻译：光学拾取器件
公开(公告)号：JP2008004149A
公开(公告)日：2008-01-10
申请号：JP2006171225
申请日：2006-06-21
申请人： Sharp Corp , シャープ株式会社
发明人： WATANABE YUKIO , KAMIYAMA TETSUO , MIYAZAKI OSAMU , IWASAKI HIROAKI
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device capable of carrying out a stable tracking by reducing the influence of stray light from a recording layer other than an original recording layer. SOLUTION: The stray light 101 is condensed once before reaching a light receiving part 8 after divided by a hologram element 3. Thus, an optical spot is formed so that the stray light is collected around the center of the light receiving part 8. Since divided areas 3e and 3f receive a part of the stray light 101, optical spots 103a to 103d and optical spots 103e and 103f are formed on the light receiving part 8. Thus, the divided areas 3e and 3f are formed, thereby suppressing optical spots from being formed on a detection elements 8j and 8m caused by the stray light 101. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过减少来自原始记录层以外的记录层的杂散光的影响来进行稳定跟踪的光学拾取装置。解决方案：杂散光101在被全息元件3分割之前到达光接收部分8之前被冷凝一次。因此，形成光斑，使得杂散光围绕光接收部分8的中心收集由于分割区域3e和3f接收杂散光101的一部分，在光接收部分8上形成光点103a至103d和光点103e和103f。因此，形成分割区域3e和3f，从而抑制光在由杂散光101引起的检测元件8j和8m上形成的斑点。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2007280466A Optical pickup device 审中-公开
标题翻译：光学拾取器件
公开(公告)号：JP2007280466A
公开(公告)日：2007-10-25
申请号：JP2006103431
申请日：2006-04-04
申请人： Sharp Corp , シャープ株式会社
发明人： MIYAZAKI OSAMU , KAMIYAMA TETSUO , WATANABE YUKIO , IWASAKI HIROAKI
IPC分类号： G11B7/135 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device for easily constituting a compact photodetector and achieving a servo operation securely performing recording/reproducing operations to an information recording medium having a different recording density. SOLUTION: The optical pickup device includes a semiconductor light receiving element 30, a first semiconductor laser 12 emitting a first laser beam LB1, a second semiconductor laser 13 emitting a second laser beam LB2, and an optical system defining an optical path of the first laser beam LB1 and the second laser beam LB2. The optical system includes a first hologram 17 and a second hologram 18. A hologram area of the second hologram 18 having different gratings separately is associated with a main beam of the second laser beam LB1 diffracted by the first hologram 17 and front and rear sub-beams, and irradiated therewith. Thus, the second hologram 18 corrects the optical path of the second laser beam P2, and the first laser beam LB1 and the second laser beam LB2 are received by a common light receiving part. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于容易地构成小型光电检测器并实现对具有不同记录密度的信息记录介质进行记录/再现操作的伺服操作的光学拾取装置。解决方案：光拾取装置包括半导体光接收元件30，发射第一激光束LB1的第一半导体激光器12，发射第二激光束LB2的第二半导体激光器13以及限定第二激光束LB2的光路的光学系统第一激光束LB1和第二激光束LB2。该光学系统包括第一全息图17和第二全息图18.分开具有不同光栅的第二全息图18的全息图区域与由第一全息图17和前后子像素衍射的第二激光束LB1的主光束相关联，并用其照射。因此，第二全息图18校正第二激光束P2的光路，并且第一激光束LB1和第二激光束LB2被公共光接收部接收。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2007035193A Optical pickup apparatus 有权
标题翻译： OPTICAL PICKUP APPARATUS
公开(公告)号：JP2007035193A
公开(公告)日：2007-02-08
申请号：JP2005219490
申请日：2005-07-28
申请人： Sharp Corp , シャープ株式会社
发明人： KAMIYAMA TETSUO , MIYAZAKI OSAMU , WATANABE YUKIO , NAKADA YASUO , MASUYAMA TOMIO
IPC分类号： G11B7/135 , G11B7/09
CPC分类号： G11B7/1353 , G11B7/0903
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup apparatus in which deterioration of amplitude of a tracking error signal by an objective lens shift is small for a plurality of kinds of optical disks of which the guide groove pitch is different, even when phase deviation given to respective regions of multi-division diffraction gratings is made small. SOLUTION: In an optical pickup apparatus 10, after light emitted from a semiconductor laser 1 is branched to three light beams of a main beam 30 and two sub-beams 31, 32 by a diffraction grating 3A, they are converged to a guide groove 61 of an optical disk 6 by an objective lens 5, three reflected light from the optical disk 6 is received by bisected detector 8A to 8C and the tracking error signal is generated. The diffraction grating 3A is divided into three regions of a first region and a second region which have period structure in which phases are different each other and a third region positioned at the middle, also, a grating groove direction of period structure is set so as to be tilted for the vertical direction to the guide groove 61 on the optical disk 6 in accordance with a phase of the second region. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：为了提供一种光拾取装置，其中对于导槽间距不同的多种光盘，由于物镜偏移而导致的跟踪误差信号的振幅劣化，即使当给予多分割衍射光栅的各个区域的相位偏差变小。解决方案：在光学拾取装置10中，在从半导体激光器1发射的光被衍射光栅3A分支到主光束30和两个子光束31,32的三个光束之后，它们会聚到通过物镜5的光盘6的引导槽61，由二等分检测器8A〜8C接收来自光盘6的三个反射光，并产生跟踪误差信号。衍射光栅3A分为具有相位彼此不同的周期结构的第一区域和第二区域的三个区域，位于中间的第三区域以及周期结构的格栅槽方向也被设定为沿着与第二区域的相位相对于光盘6上的引导槽61的垂直方向倾斜。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2006099931A Optical integrated unit and optical pickup device 有权
标题翻译：光学集成单元和光学拾取器件
公开(公告)号：JP2006099931A
公开(公告)日：2006-04-13
申请号：JP2005143057
申请日：2005-05-16
申请人： Sharp Corp , シャープ株式会社
发明人： SAKAI KEIJI , WATANABE YUKIO , MIYAZAKI OSAMU
IPC分类号： G11B7/135
CPC分类号： G11B7/0903 , G11B7/123 , G11B7/131 , G11B7/1353
摘要： PROBLEM TO BE SOLVED: To stabilize tracking control when there is a relatively large damage or stain caused by fingerprint sticking on an optical disk surface. SOLUTION: The photodetector 5 of the optical integrated unit is provided with light receiving parts 11 to 14 for receiving ± 1st-order diffracted lights, and a light receiving part 15 for receiving a 0-order diffracted transmitted light. Tracking control is executed based on the information of all reflected lights. Thus, the instability of tracking caused by stains or the like on the optical disk surface is prevented. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：当由于指纹粘附在光盘表面上而导致的相对较大的损坏或污点时，可以稳定跟踪控制。解决方案：光学集成单元的光电检测器5设置有用于接收±1级衍射光的光接收部分11至14，以及用于接收0级衍射透射光的光接收部分15。基于所有反射光的信息执行跟踪控制。因此，防止了由光盘表面上的污渍等引起的跟踪的不稳定性。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2005235310A Laser oscillation element and optical pickup apparatus 审中-公开
标题翻译：激光振荡元件和光学拾取器
公开(公告)号：JP2005235310A
公开(公告)日：2005-09-02
申请号：JP2004043559
申请日：2004-02-19
申请人： Sharp Corp , シャープ株式会社
发明人： SAKAI KEIJI , MIKI RENZABUROU , WATANABE YUKIO , MIYAZAKI OSAMU
IPC分类号： G11B7/12 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1275 , G11B7/123
摘要： PROBLEM TO BE SOLVED: To realize both of high speed recording of a CD and high quality reproduction of a DVD . SOLUTION: In a light emitting part 2 emitting a semiconductor laser beam 4 for CD and a semiconductor laser beam 5 for DVD, when width of an angle formed by straight lines by connecting points at which radiation intensity of the laser becomes 1/2 of intensity in the center of the laser in a plane being parallel to a pn junction plane of the semiconductor is assumed to radiation angle width of the laser, the radiation angle width θ2 of the laser beam 5 for DVD is set to 1.3 times or more of radiation angle width θ1 of the laser beam 4 for CD. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：实现CD的高速记录和DVD的高质量再现。解决方案：在发射用于CD的半导体激光束4和用于DVD的半导体激光束5的发光部分2中，当通过连接激光器的辐射强度的点的直线形成的角度的宽度变为1 / 假设在与半导体的pn结平面平行的平面中的激光中心的激光强度2为激光的辐射角宽度，DVD的激光束5的辐射角宽度θ2设定为1.3倍，用于CD的激光束4的辐射角宽度θ1更多。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2005071451A Optical pickup device 有权
标题翻译：光学拾取器件
公开(公告)号：JP2005071451A
公开(公告)日：2005-03-17
申请号：JP2003298362
申请日：2003-08-22
申请人： Sharp Corp , シャープ株式会社
发明人： MIYAZAKI OSAMU , SAKAI KEIJI , MIKI RENZABUROU
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device by which stable tracking servo performance in which there is no reduction in the light quantity of a main beam and an offset caused by a shift of an objective lens or the tilt of a disk is not generated can be obtained. SOLUTION: In the optical pickup device, a 1st optical element 7 and a 2nd optical element 8 are arranged between an objective lens 5 and an integrated unit 1. The 1st optical element 7 has a diffraction part which diffracts a part of the reflected light from an optical disk 6 and the diffraction part has polarization anisotropy. The 2nd optical element 8 is constituted of a quarter-wave plate which converts the polarized state of the reflected light from the optical disk 6 into a linearly polarized state. The 1st optical element 7 and the 2nd optical element 8 are provided by being integrated with the objective lens 5. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种光学拾取装置，通过该光学拾取装置，其中不存在主光束的光量不会降低的稳定的跟踪伺服性能以及由物镜的偏移引起的偏移或物镜的倾斜磁盘不生成可以获得。解决方案：在光学拾取装置中，第一光学元件7和第二光学元件8布置在物镜5和集成单元1之间。第一光学元件7具有衍射部分，其衍射部分来自光盘6的反射光和衍射部分具有偏振各向异性。第二光学元件8由将来自光盘6的反射光的偏振状态转换成线偏振的四分之一波片构成。第一光学元件7和第二光学元件8通过与物镜5集成而提供。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2004265458A Optical integrated unit and optical pickup device provided with the same 有权
公开(公告)号：JP2004265458A
公开(公告)日：2004-09-24
申请号：JP2003020614
申请日：2003-01-29
申请人： Sharp Corp , シャープ株式会社
发明人： MIKI RENZABUROU , SAKAI KEIJI , NUMATA TOMIYUKI , KAMIYAMA TETSUO , MAKIOKA HIROSHIGE , MIYAZAKI OSAMU
IPC分类号： G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135
CPC分类号： G11B7/131 , G11B7/123 , G11B7/133 , G11B7/1353 , G11B7/1356
摘要： PROBLEM TO BE SOLVED: To provide an optical integrated unit in which such trouble can be prevented easily that an erroneous detection is undesirebly caused, and an optical pickup device provided with the same. SOLUTION: A light receiving plane 36 of a light receiving part 25 is divided into one side of light receiving region 38a and the other light receiving region 38b concerning a virtual one flat plane 37, and also, the one side of light receiving region 38a is divided into first, third, and fifth light receiving region parts 41, 43, 45, the other side light receiving region 38b is divided into second, fourth, and sixth light receiving region parts 42, 44, 46. First to third diffraction planes 31a-31b of hologram 31 guide a laser beam to the first to the sixth light receiving region parts 41-46. An optical element 32 is provided between the light receiving part 25 and the hologram 31 so that the element 32 transmits one part La1 of diffraction light diffracted by the first diffraction plane 31a of the hologram 31, guides it to the first light receiving region part 41 in the one side of light receiving region 38a, and transmits one part Lb2 of diffraction light diffracted by the second diffraction plane 31b, guides it to the fourth light receiving region part 44 in the other side of light receiving region 38b. COPYRIGHT: (C)2004,JPO&NCIPI

10. 发明专利

JP2010135017A Optical pickup device and information recording and reproducing device 审中-公开
标题翻译：光学拾取装置和信息记录和再现装置
公开(公告)号：JP2010135017A
公开(公告)日：2010-06-17
申请号：JP2008311198
申请日：2008-12-05
申请人： Sharp Corp , シャープ株式会社
发明人： MIYAZAKI OSAMU
IPC分类号： G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device and the like employing a push-pull method which has improved light utilization efficiency in a reproduced signal, has low cost and is suitable for integration. SOLUTION: In the optical pickup device, a reproduced signal and a push-pull signal are generated from an electric signal output by each of first light receiving parts 131a to 131d, an objective lens shift signal is generated from an electric signal output by each of second light receiving parts 131i to 131p, and a focus error signal is generated from an electric signal output by each of third light receiving parts 131e to 131h. Then, the objective lens shift signal is generated from electric signals output by any two of adjacent second light receiving parts 131i to 131p, wherein one of each of the electric signals has a positive value and the other has a negative value. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：解决问题的方案为了提供一种使用提高再生信号的光利用效率的推挽方式的光拾取装置等，成本低，适合于集成。解决方案：在光学拾取装置中，从由第一光接收部分131a至131d中的每一个输出的电信号产生再现信号和推挽信号，从电信号输出产生物镜移位信号通过第二光接收部131i至131p中的每一个，并且从由第三光接收部131e至131h中的每一个输出的电信号产生聚焦误差信号。然后，由相邻的第二光接收部131i〜131p中的任意两个输出的电信号产生物镜偏移信号，其中，每个电信号中的一个具有正值，另一个具有负值。版权所有（C）2010，JPO＆INPIT

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