公开(公告)号：JP2006048794A

公开(公告)日：2006-02-16

申请号：JP2004225833

申请日：2004-08-02

Applicant: Sony Corp ,  ソニー株式会社

Inventor： YAMAMOTO KENJI ,  SATO KATSUTOSHI ,  NISHI NORIAKI ,  KANETANI MIDORI ,  MAKITA MASAYA

IPC: G11B7/135 ,  G11B7/125

CPC classification number: G11B7/1398

Abstract: PROBLEM TO BE SOLVED: To hold an excellent recording and reproducing characteristic by emitting a beam spot to a recording track in an optimum shape in an optical pickup device and an optical recording and reproducing device applicable to to an optical recording medium including an optical recording medium of a BD (Blu-ray Disc) type configuration. SOLUTION: In this optical pickup device, wherein a semiconductor laser is provided as a light source and when a direction parallel to its active layer is disposed almost parallel to the board face of an optical recording medium, light rays emitted from the semiconductor laser are reflected by a reflecting surface in a direction almost perpendicular to the board face of the optical recording medium and light of the wavelength being at least equal to or greater than 400 and equal to or smaller than 415 nm is subsequently emitted to the optical recording medium through an objective lens to perform recording and/or reproduction, an angle θ formed between the direction of the light rays made incident on the reflecting surface and the extension direction of a recording track of the optical recording medium is defined as 45 ≤θ COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 解决的问题：通过在光学拾取装置和光学记录和再现装置中以最佳形状向记录轨道发射光斑以保持良好的记录和再现特性，该光学记录和再现装置适用于包括 BD（蓝光盘）型配置的光记录介质。 解决方案：在该光拾取器件中，其中半导体激光器被提供为光源，并且当与其有源层平行的方向被设置为几乎平行于光记录介质的基板面时，从半导体发射的光线 激光由几乎垂直于光记录介质的板面的方向被反射表面反射，随后将至少等于或大于等于或等于或等于415nm的波长的光发射到光学记录 介质通过物镜执行记录和/或再现，在入射到反射表面的光线的方向与光学记录介质的记录轨道的延伸方向之间形成的角度θ被定义为45≤θ< 90°。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005353259A

公开(公告)日：2005-12-22

申请号：JP2005114380

申请日：2005-04-12

Applicant: Sony Corp ,  ソニー株式会社

Inventor： YAMAMOTO KENJI ,  SATO KATSUTOSHI ,  NISHI NORIAKI ,  KANETANI MIDORI

IPC: G11B7/135 ,  G02B26/08 ,  G02B27/28 ,  G11B7/00 ,  G11B7/125

CPC classification number: G11B7/139 ,  G02B27/283 ,  G11B7/1275 ,  G11B7/1378 ,  G11B7/1395 ,  G11B2007/0006

Abstract: PROBLEM TO BE SOLVED: To set optical magnification optimum for each wavelength by an optical pickup in which an optical system consisting of a collimator lens and an objective lens commonly passing a laser beam of multi-wavelength is housed. SOLUTION: A bypass optical path consisting of a beam splitter for bypassing a magnification conversion element 4, a pair of mirrors, and a beam splitter is provided at an optical path having a three wavelengths collimator lens, the magnification conversion element, and a three wavelengths correspondence objective lens. When a laser beam has a wavelength of 407 nm, the laser beam is made to pass through the optical path in which the magnification conversion element is present and magnification of the optical path is made 12 times, and when the laser beam has a wavelength of 650 nm, the laser beam is made to pass through the bypass circuit and magnification of the optical path is made 5 times. Thereby, magnification being optimum for each wavelength is freely set by the optical pickup in which the optical system consisting of the collimator lens and the objective lens commonly passing the laser beam of multi-wavelength is housed. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：通过光学拾取器来设置每个波长最佳的光学倍率，其中容纳了由准直透镜和通常通过多波长的激光束的物镜组成的光学系统。 解决方案：在具有三个波长的准直透镜，放大率转换元件和光学透镜的光路上设置由用于旁路放大转换元件4的分束器，一对反射镜和分束器组成的旁路光路 三波长对应物镜。 当激光束具有407nm的波长时，使激光束通过存在放大率转换元件的光路，并且使光路的倍率为12倍，并且当激光束的波长为 650nm，使激光束通过旁路电路，使光路的倍率为5倍。 因此，通过容纳由准直透镜构成的光学系统和通常通过多波长的激光的物镜的光学拾取器自由地设定每个波长的最佳倍率。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005327395A

公开(公告)日：2005-11-24

申请号：JP2004145638

申请日：2004-05-14

Applicant: Sony Corp ,  ソニー株式会社

Inventor： YAMAMOTO KENJI ,  SATO KATSUTOSHI ,  NISHI NORIAKI ,  KANETANI MIDORI ,  MAKITA MASAYA

IPC: G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135

CPC classification number: G11B7/1376 ,  G11B7/13927 ,  G11B2007/0006

Abstract: PROBLEM TO BE SOLVED: To make common structure of an optical pickup performing recording or reproducing of information for a plurality of kinds of optical information recording media having different kinds of formats and a recording and/or reproducing device using the same and downsize them, and to correct spherical aberration. SOLUTION: The optical pickup is provided with a light source part 41 having a first emitting part emitting a light beam of a first wavelength, a second emitting part emitting a light beam of a second wavelength, a third emitting part emitting a third light beam, a collimator lens 33 having different focal lengths depending on the first to the third wavelength, and an objective lens 32 converging the light beam emitted from the first to the third emitting parts on the information recording plane of an optical disk 2. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了使具有不同格式的多种光学信息记录介质的信息的记录或再现的光学拾取器的共同结构以及使用其的记录和/或再现装置和小型化 并修正球面像差。 解决方案：光学拾取器设置有光源部分41，光源部分41具有发射第一波长的光束的第一发射部分，发射第二波长的光束的第二发射部分，发射第三波长的第三发射部分 光束，根据第一至第三波长具有不同焦距的准直透镜33以及将从第一至第三发射部分发射的光束会聚在光盘2的信息记录平面上的物镜32. < P>版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2003157568A

公开(公告)日：2003-05-30

申请号：JP2001351012

申请日：2001-11-16

Applicant: SONY CORP

Inventor： SATO KATSUTOSHI

IPC: G11B7/09 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To realize a downsizing and cost reduction and to surely detect a tracking error signal with an optical head which is used for reproducing (or recording and reproducing) a DVD and is commonly used recording and reproducing a CD-R/RW. SOLUTION: An element formed by semiconductor lasers 12 of a wavelength 650 nm for the DVD and photodetecting section 13 commonly used for the DVD and the CD-R/RW on a common substrate and housing these within one package is disposed as an integrated element 11. The outside of the integrated element 11 is provided with a semiconductor laser 21 of a wavelength 780 nm for the CD-R/RW. An optical axis correction element 15 is arranged between the integrated element 11 and a beam splitter 16. A step hologram, blaze hologram, etc., are used as the optical axis correction element 15.

公开(公告)号：JP2001076363A

公开(公告)日：2001-03-23

申请号：JP24816099

申请日：1999-09-02

Applicant: SONY CORP

Inventor： SATO KATSUTOSHI

IPC: G11B7/125 ,  G02B5/32

Abstract: PROBLEM TO BE SOLVED: To diffuse unintended light in various directions or to restrain its reflection and t reduce the incidence of a stray light to a light receiving element by applying a stray light treatment for reducing the regular reflection of incident light to the incident surface, the exiting surface or the side surface of a laser beam excepting a diffracted pattern. SOLUTION: Laser beams LA, LB emitted from laser diode chips 12A, 12B are diffracted by the light source side hologram 18A of a hologram element 18 and are emitted after being reflected by a right angle prism 15, and return light is diffracted by an objective lens side hologram 18C and is received. Thus, various degrees of unintended diffracted light beams excepting the objective diffracted light beam are generated in an optical integrated element 12, and the unintended diffracted light beams are possibly to be reflected as a stray light by respective surfaces of the hologram element 18 and to make incident on light receiving elements 16A, 16B. Thereupon, the surfaces excepting the holograms 18A, 18C of the hologram element 18 are roughened and are subjected to a stray light treatment.

公开(公告)号：JP2000276755A

公开(公告)日：2000-10-06

申请号：JP8071299

申请日：1999-03-25

Applicant: SONY CORP

Inventor： SATO KATSUTOSHI ,  BABA TOMOHIKO

IPC: G11B7/095 ,  G11B7/125 ,  G11B7/13

Abstract: PROBLEM TO BE SOLVED: To make simplifiable the operation control by converging laser beams emitted from a light source to an optical disk, emitting return light obtained from the disk to a light receiving element and integrally turning the light source and the light receiving element with the light emitting point of the laser beam of the light source as a turning center. SOLUTION: A gate control mechanism 42 is composed of a holder 42A for holding a light integrating element 4 and a receiver 42B of the holder 42A. The receiver 42B is formed by making a base 40 almost circular and thin in wall thickness and a through hole 42C is formed at the center of the circular form. The holder 42A is formed into a disk, a through hole is formed at the center and the light integrating element 4 is held so as to guide the laser beams emitted from the light integrating element 4 to the side of the receiver 42B. The holder 42A controls the inclination of the light integrating element 4 by turning the light integrating element 4 constituted by integrally holding a light emitting element and the light receiving element with the virtual light emitting point of the light integrating element 4 as a center as shown by arrows B and C.

公开(公告)号：JP2006079781A

公开(公告)日：2006-03-23

申请号：JP2004265380

申请日：2004-09-13

Applicant: Sony Corp ,  ソニー株式会社

Inventor： MAKITA MASAYA ,  SATO KATSUTOSHI ,  KANETANI MIDORI ,  OKUMA HIDEO ,  YAMAMOTO KENJI ,  NISHI NORIAKI

IPC: G11B7/135 ,  G11B7/085 ,  G11B7/09

Abstract: PROBLEM TO BE SOLVED: To facilitate design of an optical pickup and to improve movement efficiency. SOLUTION: This apparatus is provided with a fixed block 10 fixed to a movement base 7, and a movable block 11 moved in the directions of focusing and tracking for the fixed block, while holding a first objective lens 16 and a second objective lens 17 arranged being separated in the almost tangential direction for a recording track, when a lens center S2 of the second objective lens is positioned at a segment of a line Lr passing through a center of a disk type recording medium 100 and extended to a radial direction and the lens center of the second objective lens is positioned corresponding to a recording track Ti existing in the most inner periphery, a lens center S1 of the first objective lens is positioned corresponding to a more outside than a recording track existing at the most inner periphery or the recording track, when the lens center of the second objective lens is positioned corresponding to a recording track To existing at the most outer periphery, the lens center of the first objective lens is positioned corresponding to a more inside than the recording track existing at the most outer periphery or the recording track. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了便于光学拾取器的设计和提高运动效率。 解决方案：该装置设置有固定到移动基座7的固定块10和沿固定块的聚焦和跟踪方向移动的可移动块11，同时保持第一物镜16和第二物镜 当第二物镜的透镜中心S2位于通过盘型记录介质100的中心并延伸到径向的线Lr的一段时，布置为沿着切线方向分隔的记录轨道的透镜17 方向，并且第二物镜的透镜中心对应于存在于最内侧的记录轨道Ti，第一物镜的透镜中心S1对应于比存在于最内侧的记录轨道更外侧 周边或记录轨道，当第二物镜的透镜中心对应于存在于最外周的记录轨道To时，透镜中心 第一物镜被定位成比存在于最外周边或记录轨道处的记录轨道更内侧。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005353250A

公开(公告)日：2005-12-22

申请号：JP2004196980

申请日：2004-07-02

Applicant: Sony Corp ,  ソニー株式会社

Inventor： YAMAMOTO KENJI ,  NISHI NORIAKI ,  SATO KATSUTOSHI ,  KANETANI MIDORI

IPC: G11B7/135 ,  G11B7/125

Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup having an optical system consisting of a common collimator lens and an objective lens for multi-wavelength laser beams, in which magnification being optimum for respective wavelengths is set, and also to provide an optical disk apparatus using this optical pickup. SOLUTION: By putting in and out a magnification conversion element 3 to/from an optical path between a multi-wavelength collimator lens 2 and a multi-wavelength correspondence objective lens 4 depending on the wavelengths of the laser beams, that is, in the case of the wavelength of 407 mm for BD, composite focal distance with the multi-wavelength correspondence objective lens 4 is shortened and optical magnification is enlarged by putting the magnification conversion element 3 in the optical path. In the case of the wavelength of 650 mm for DVD, optical magnification is made five times of the original one by putting the magnification conversion element 3 off the optical path. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种具有由公共准直透镜和用于多波长激光束的物镜组成的光学系统的光学拾取器，其中设置了针对各个波长的最佳倍率，并且还提供 使用该光学拾取器的光盘装置。 解决方案：根据激光束的波长，通过将放大转换元件3放入/离开多波长准直透镜2和多波长对准物镜4之间的光路， 在BD的波长为407mm的情况下，通过将放大率转换元件3放置在光路中，与多波长对应物镜4的复合焦距缩短，并且放大倍率。 在DVD的波长为650mm的情况下，通过将放大率转换元件3放在光路上，使光学倍率成为原来的5倍。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005327388A

公开(公告)日：2005-11-24

申请号：JP2004145252

申请日：2004-05-14

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KANETANI MIDORI ,  SATO KATSUTOSHI ,  YAMAMOTO KENJI ,  NISHI NORIAKI ,  MAKITA MASAYA ,  MORI NORIYUKI

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To save the space for an optical system which records and reproduces CDs, DVDs, and BDs by correcting an optical axis tilt resulting from a different light emission point position without causing light quantity loss nor characteristic deterioration when an LD capable of emitting two-wavelength or three-wavelength lasers having a long light emission point interval is used. SOLUTION: An optical system put in an optical pickup includes a one-wavelength laser diode 11 dedicated for DBs, a two-wavelength laser diode 28 dedicated to both CDs and DVDs, and an objective 23 exclusively for DBs, and an objective 24 exclusively for both CDs and DVDs, and an optical path change angle for making a laser beam of 780 nm in wavelength incident on the objective for both CDs and DVDs is set to such an angle that an optical axis tilt of the laser beam of 780 nm in wavelength being eliminated. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了节省记录和再现CD，DVD和BD的光学系统的空间，通过校正由不同的光发射点位置产生的光轴倾斜，而不会导致光量损失，或者当 使用能够发射具有长发光点间隔的双波长或三波长激光器的LD。 光拾取器中的光学系统包括专用于DB的单波长激光二极管11，专用于CD和DVD的双波长激光二极管28和专用于DB的物镜23，以及物镜 24专用于CD和DVD，并且用于使入射到用于CD和DVD的物镜上的波长为780nm的激光束的光程变化角被设定为使激光束的光轴倾斜为780° nm波长被消除。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2003157556A

公开(公告)日：2003-05-30

申请号：JP2001351690

申请日：2001-11-16

Applicant: SONY CORP

Inventor： SATO KATSUTOSHI

IPC: G11B7/09

Abstract: PROBLEM TO BE SOLVED: To cancel an off-axis aberration in the case of shaking a field of view not only when reproducing a DVD but also when reproducing a CD in the optical head of a non-infinite system. SOLUTION: When reproducing the DVD, a finite objective lens 1 is moved back from a magnetically neutral position Po a distance Hd and when reproducing the CD, the finite objective lens 1 is moved forwards from the magnetically neutral position Po a distance Hc. In an actuator for driving the finite objective lens 1 in a focusing direction and a tracking direction, by utilizing a stress difference caused by a difference in the operating position of the finite objective lens 1, the characteristics of a lens inclination angle relative to an amount of lens movement in the case of moving the finite objective lens 1 in the tracking direction are changed in the cases of reproducing the DVD and reproducing the CD and the actuator has rolling characteristics for inclining the finite objective lens 1 at an inclination angle for canceling the third-order coma aberration in an inclination direction to cancel the third-order coma aberration in both the cases of reproducing the DVD and reproducing the CD.