公开(公告)号：JP2011146091A

公开(公告)日：2011-07-28

申请号：JP2010005736

申请日：2010-01-14

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKAO TAKASHI ,  NISHI NORIAKI ,  SAITO KIMIHIRO

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To improve sensitivity and accuracy of detection and reduce the size of a photodetector when a tilt is detected by comparing a focus error signal of a side spot. SOLUTION: First and second focus error signals for tilt detection are generated based on a result of diffracting reflected light beams of first and second light beams for tilt detection and receiving the resultant first-order diffracted light beams. Therefore, the distance between spots of the reflected light beams of the first and second light beams for tilt detection on a photodetector surface can be arbitrarily set regardless of the distance on a disk. As a result, the size of the photodetector can be reduced even if the distance between the spots on the optical recording medium is increased to improve the tilt detection sensitivity. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：通过比较侧点的聚焦误差信号来检测倾斜时，提高检测的灵敏度和精度，并减小光电检测器的尺寸。 解决方案：基于用于倾斜检测的第一和第二光束的反射光的衍射的结果并接收所得的一级衍射光，产生用于倾斜检测的第一和第二聚焦误差信号。 因此，与光盘上的距离无关地，用于光检测器表面上的倾斜检测的第一和第二光束的反射光束的光斑之间的距离可以任意设定。 结果，即使增加光记录介质上的光斑之间的距离，也可以减小光检测器的尺寸，以提高倾斜检测灵敏度。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010198676A

公开(公告)日：2010-09-09

申请号：JP2009041054

申请日：2009-02-24

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKANO FUMIAKI ,  ANDO NOBUHIKO ,  NISHI NORIAKI ,  NAKAO TAKASHI ,  NAKAGAWA HIROAKI ,  AMATAKU YUTAKA

IPC: G11B7/135 ,  G11B7/09 ,  G11B7/13

CPC classification number: G11B7/1353 ,  G11B7/0903 ,  G11B7/131 ,  G11B2007/0013

Abstract: PROBLEM TO BE SOLVED: To enable generation of a light receiving signal required for tracking control without being influenced by interlayer stray light, even if an optical disk has many recording layers, and lens shifting occurs. SOLUTION: An optical pickup 17 carries out diffraction of the reflected light beam LR by a hologram element 27, separates reflected light beams LR1E and LR1F containing a push pull component and a lens shifting component into an inner periphery side and an outer peripheral side of a longitudinal direction and makes them advance, makes reflected light beams LR1G and LR1H containing lens shifting components advance to a horizontal direction, respectively, and generates the light receiving signal S by light receiving areas RE and RF, light receiving areas RG and RH, which are isolated only for the distance d2 in lateral direction, and stray light receiving areas which are arranged adjoining the light receiving areas RE, RF, RG and RH respectively in a photodetector 29. An optical disk device 10 eliminates the influence of a stray light pattern W and the lens shifting by computing a tracking error signal STE2 using the light receiving signal S. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：即使光盘具有多个记录层，并且发生透镜偏移，为了能够产生跟踪控制所需的光接收信号而不受层间杂散光的影响。 解决方案：光学拾取器17通过全息元件27进行反射光束LR的衍射，将包含推挽元件和透镜移位元件的反射光束LR1E和LR1F分离成内周侧和外周 并使其前进，使包含透镜偏移分量的反射光束LR1G和LR1H分别前进到水平方向，并且通过光接收区域RE和RF，光接收区域RG和RH产生光接收信号S 它们分别仅在横向方向上隔开距离d2隔离，并且在光电检测器29中分别邻近光接收区域RE，RF，RG和RH布置的杂散光接收区域。光盘装置10消除了杂散影响 光模式W和透镜通过使用光接收信号S计算跟踪误差信号STE2而移位。（C）2010，JPO＆INPIT

公开(公告)号：JP2010027098A

公开(公告)日：2010-02-04

申请号：JP2008184062

申请日：2008-07-15

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKANO FUMIAKI ,  NISHI NORIAKI ,  NAKAO TAKASHI

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To generate light-receiving signals for tracking control without being affected by interlayer stray light. SOLUTION: In an optical disk device 1, a Rochon prism 17 causes a P polarization component to go nearly straight as a reflected light beam LRP and greatly refracts an S polarization component downward as a reflected light beam LRS. A polarization hologram element 18 allows the reflected light beam LRP to pass therethrough and diffracts the reflected light beam LRS by each area 18A to 18E to generate reflected light beams LRSA to LRSE. Consequently, in a photodetector 21, a detection part D2 separated apart from a detection part D1 detecting the reflected light LRP receives the reflected light beams LRSA to LRSD while avoiding a stray light pattern W1 and generates the light-receiving signals S2A to S2D. Therefore, a tracking error signal STE1 is generated without being affected by the stray light pattern W1, so that tracking control is performed precisely. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：产生用于跟踪控制的光接收信号，而不受层间杂散光的影响。 解决方案：在光盘装置1中，Rochon棱镜17使P偏振分量作为反射光束LRP变成几乎直线，并且作为反射光束LRS大大地折射S偏振分量。 偏振全息元件18允许反射光束LRP通过，并且通过每个区域18A至18E衍射反射光束LRS以产生反射光束LRSA至LRSE。 因此，在光电检测器21中，与检测反射光LRP的检测部分D1分离的检测部分D2接收反射光束LRSA至LRSD，同时避免杂散光图案W1并产生光接收信号S2A至S2D。 因此，不受杂散光图案W1的影响而产生跟踪误差信号STE1，从而精确地执行跟踪控制。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2007328838A

公开(公告)日：2007-12-20

申请号：JP2006157634

申请日：2006-06-06

Applicant: Sony Corp ,  ソニー株式会社

Inventor： HAYASAKA KENGO ,  NAKAO TAKASHI

IPC: G11B7/135 ,  G11B7/004 ,  G11B7/125

CPC classification number: G11B7/13925 ,  G11B7/131 ,  G11B7/1369 ,  G11B7/1395 ,  G11B19/127 ,  G11B2007/0006 ,  G11B2007/0013

Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup capable of reliably deciding the number of layers of an optical disk and to provide an optical disk device. SOLUTION: The optical pickup includes: a polarization optical element 18 having respective boundary surfaces at front and rear parts separated by a prescribed distance from a focused point on which focused light reflected by a focused recording layer in reflection light beams is condensed by a condenser lens 17 on the surface including optical axes of the reflection light beams condensed by the condenser lens 17 and changing the polarization direction of stray light contained in the reflection light beams by reflecting only the stray light reflected by a non-focused recording layer in the reflection light beams; a separating means 20 in which a reflection light beam emitted from the polarization optical element 18 is made incident and which separates focused light and stray light contained in the reflection light beam on the basis of its polarization direction; and a stray light detecting means 25 having a plurality of light receiving regions for detecting the light quantity of the stray light separated by the separating means 20. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够可靠地决定光盘的层数并提供光盘装置的光学拾取器。 解决方案：光拾取器包括：偏振光学元件18，其在与聚焦点分开预定距离的前后部分上具有各自的边界面，聚焦点由反射光束中的聚焦记录层反射的聚焦光会聚合在该聚焦点上 聚光透镜17，其包括由聚光透镜17聚光的反射光的光轴，并且通过仅反射由非聚焦记录层反射的杂散光来改变包含在反射光束中的杂散光的偏振方向 反射光束; 分离装置20，其中从偏振光学元件18发射的反射光束入射并基于其偏振方向分离包含在反射光束中的聚焦光和杂散光; 以及具有多个光接收区域的杂散光检测装置25，用于检测由分离装置20分离的杂散光的光量。（C）2008，JPO＆INPIT

公开(公告)号：JP2002133701A

公开(公告)日：2002-05-10

申请号：JP2000321364

申请日：2000-10-20

Applicant: SONY CORP

Inventor： NAKAO TAKASHI

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To accurately detect a mounting position and facilitate manufacture and adjustment of a device. SOLUTION: A beam from a laser light source 10 is made incident on a diffraction grating 12 through a collimator lens 11. Only a diffracted beam with a random plane of polarization is transmitted through a polarization beam splitter 13 and it is irradiated on a recording face of an optical disk 16 via a quarter wave length plate 14 and an objective lens 15. A beam reflected by the recording face of the optical disk 16 passes through the objective leans 15 and the quarter wave length plate 14 and it is also reflected by the polarization beam splitter 13. The reflected beam is focused by a focusing lens 17 and it is made incident on a hologram element 18 diffracting the beam and providing focus positions of ±1 order diffracted beams in fore and aft in an optical axis direction of a focus position of a 0 order diffracted beam. The diffracted beams are irradiated on a light detecting means 20 through an optical element enlarging diameters of the diffracted beams in a certain direction such as a parallel flat plate 19 provided obliquely to the optical axis direction.

公开(公告)号：JP2002074703A

公开(公告)日：2002-03-15

申请号：JP2000266172

申请日：2000-09-01

Applicant: SONY CORP

Inventor： ICHIMURA ISAO ,  YAMAMOTO KENJI ,  NAKAO TAKASHI

IPC: G11B7/24 ,  G11B7/09 ,  G11B7/135 ,  G11B11/105

Abstract: PROBLEM TO BE SOLVED: To eliminate the effect of a total reflection component generating on a face where an optical disk recording medium having a rugged face and a solid immersion lens (SIL) are facing each other, in detecting a tracking error signal by means of a near field optical system using the SIL. SOLUTION: The detecting segments A-D of a quadripartite photodetector 31 for detecting servo error signals are designed to be unirradiated with the ring-shaped total reflection component. Its method, for example, is varying the magnification of a condensing lens in the prestage of a photodetector in an optical pickup, or providing a diaphragm in the prestage of the photodetector 31 to repel the total reflection component. Otherwise, a light transmitting protective layer having a refractive index larger than the effective numerical aperture of an objective lens with SIL is installed on the surface of the optical disk recording medium so that the detecting segments of the photodetector is unirradiated by eliminating the total reflection component generating on the opposing face of the optical disk recording medium and SIL.

公开(公告)号：JP2000011403A

公开(公告)日：2000-01-14

申请号：JP18258998

申请日：1998-06-29

Applicant: SONY CORP

Inventor： NAKAO TAKASHI

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To provide an optical information recording and reproducing device and a method thereof which are capable of facilitating detection of a focal error signal of plural focal positions. SOLUTION: In the optical information recording and reproducing device an optical system forms plural luminous fluxes of different focal positions and is provided with a single photo-detector 10 for detecting plural focal error signals from the plural luminous fluxes at the same time. Consequently, it is possible to detect focal error signals of plural focal positions, which have not been obtainable without arrangements of other detecting systems, by using a single photo-detecting mechanism and by holding the use of various kinds of conventional track error signal detecting methods. Therefore, it is possible to realize a collision avoidance mechanism without providing any special mechanism if one of two focal positions is used for a normal focus servo and the other one is used for a proximity sensor of an objective lens.

公开(公告)号：JPH0547006A

公开(公告)日：1993-02-26

申请号：JP22456991

申请日：1991-08-09

Applicant: SONY CORP

Inventor： NAKAO TAKASHI ,  OSATO KIYOSHI ,  KABAYA YOSHITERU ,  NARAHARA TATSUYA ,  OSUE TADASHI

IPC: G11B7/09 ,  G11B7/003 ,  G11B7/0033

Abstract: PURPOSE:To draw an ideal track trace at recording even with the optical recording media in which a pre-formatted track does not exist. CONSTITUTION:Through a rotational optical scanning system, the light from a light source placed outside of the rotational optical scanning system is irradiated to an optical recording media and thus information is recorded in a recording media. Before information is recorded in an optical recording media, a reference recording media 12 on which an ideal track trace is formed is reproduced by executing tracking control. The information related with tracking control which is obtained at the above stated process is stored in a wave form memory 33. By using this stored information related with tracking control, information is recorded on an optical recording media while scan-controlling a recorded optical spot in order to draw an ideal track trace on it.

公开(公告)号：JPH03113728A

公开(公告)日：1991-05-15

申请号：JP24835489

申请日：1989-09-25

Applicant: SONY CORP

Inventor： OSATO KIYOSHI ,  NAKAO TAKASHI ,  NARAHARA TATSUYA

IPC: G11B11/10 ,  G11B7/09 ,  G11B11/105

Abstract: PURPOSE:To improve precision by using the difference of a push-pull output signal from a two-divide detector to detect a pair of side spots as a rotation error signal. CONSTITUTION:Light beam side sports S+1 and S-1 are detected by the two- divide light beam spot detectors 4+1, 4-1 respectively. Next, the difference output signals TE+1, TE-1 of output signal from every light beam sport detecting part 4+a, 4+b and 4-a, 4-b are obtained by differential amplifiers 11+1, 11-1. Both the difference output signal TE+1 of the amplifier 11+1 and the difference output signal TE-1 of the amplifier 11-1 are supplied to the differential amplifier 14, and the rotation error signal RE is obtained. By obtaining the rotation error of a light beam spot in such a way, the error of the rotation angle of the light beam spot can be detected by the precision higher than 0.1 deg., and the high preci sion control of the rotation angle of the light beam spot can be executed.

公开(公告)号：JP2014017036A

公开(公告)日：2014-01-30

申请号：JP2012153923

申请日：2012-07-09

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SUMI YOJIRO ,  KOBAYASHI SEIJI ,  SAITO KIMIHIRO ,  MAEDA FUMISADA ,  NAKAO TAKASHI ,  MIURA TAKAHIRO ,  IKUTA TOMOYA

IPC: G11B7/0065 ,  G11B7/0045 ,  G11B7/135 ,  G11B7/26

Abstract: PROBLEM TO BE SOLVED: To provide a method for seamlessly connecting phases of holograms, in initialization processing of a negative type optical recording medium.SOLUTION: A mirror is arranged on a lower surface side of an optical recording medium having a hologram recording material layer. In this state, an upper surface side of the optical recording medium is irradiated with a laser beam having uniform light intensity and phase. The laser beam is interfered with a reflected laser beam obtained by reflecting the laser beam at the mirror, so that a hologram is formed on the hologram recording material layer. Even if the laser beam is not vertically incident on the hologram recording material layer, phases of holograms can be seamlessly connected at initialization processing.

Abstract translation: 要解决的问题：提供一种用于在负型光记录介质的初始化处理中无缝连接全息图的方法。解决方案：在具有全息图记录材料层的光记录介质的下表面侧上布置有反射镜。 在该状态下，用具有均匀的光强度和相位的激光束照射光记录介质的上表面侧。 激光束受到反射激光束的反射激光束的干涉，从而在全息图记录材料层上形成全息图。 即使激光束不垂直入射在全息图记录材料层上，在初始化处理时，全息图的相位可以无缝连接。