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    OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE AND PRISM
    1.
    发明公开
    OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE AND PRISM 审中-公开
    光学拾取器件，光盘设备和PRISM

    公开(公告)号：KR20070082023A

    公开(公告)日：2007-08-20

    申请号：KR20070012479

    申请日：2007-02-07

    Applicant: SONY CORP

    Inventor： TAKASAWA TAKEHARU

    IPC: G11B7/135 ,  G11B7/09 ,  G11B7/12

    CPC classification number: G11B7/1359

    Abstract: An optical pickup device, an optical disc device, and a prism are provided to reduce the thickness of the entire optical path by narrowing a light flux vertical width of an optical beam to be narrower than the last light flux diameter although a light source in which an emission angle of the optical beam is broad in an upper and lower direction is used. An LD(Laser Diode)(21) emits an optical beam whose emission angle is broad in an upper and lower direction vertical to an information recording surface of an optical disc and is narrow in a horizontal direction. A collimator lens(22) converts the optical beam emitted from the LD(21) into a collimating beam. An objective lens(29) condenses the optical beam on the optical disc. An extending part extends a light flux horizontal width, which is a width of a direction horizontal to the information recording surface of the optical disc of the optical beam converted into the collimating beam by the collimator lens(22), to the last light flux diameter which is a diameter of the optical beam when the optical beam is inputted to the objective lens(29). A prism extends a light flux vertical width, which is a width of a direction vertical to the information recording surface of the optical disc of the extended optical beam, to the last light flux diameter, and simultaneously emits the optical beam to the objective lens(29). The collimator lens(22) converts the optical beam into the collimating beam so that the light flux vertical width and the light flux horizontal width in the optical beam are narrower than the last light flux diameter.

    Abstract translation: 提供一种光学拾取装置，光盘装置和棱镜，以通过使光束的光束垂直宽度窄于最后光束直径来缩小整个光路的厚度，尽管其中光源 使用光束的上下方向宽的发射角。 LD（激光二极管）（21）发出在垂直于光盘的信息记录表面的上下方向的发射角宽的光束，并且在水平方向上窄。 准直透镜（22）将从LD（21）发射的光束转换成准直光束。 物镜（29）将光束会聚在光盘上。 延伸部分将光通量水平宽度延伸，该光束水平宽度是与通过准直透镜（22）转换成准直光束的光束的光盘的信息记录表面的水平方向的宽度延伸到最后的光通量 当光束被输入到物镜（29）时，其是光束的直径。 棱镜将垂直于扩展光束的光盘的信息记录表面的方向的宽度的光束垂直宽度延伸到最后的光束直径，同时将光束发射到物镜（ 29）。 准直透镜（22）将光束转换成准直光束，使得光束中的光束垂直宽度和光束水平宽度比最后光束直径窄。

    Optical pickup device and optical disc reproducing apparatus
    2.
    发明专利
    Optical pickup device and optical disc reproducing apparatus 未知

    公开(公告)号：SG47219A1

    公开(公告)日：1998-03-20

    申请号：SG1997001019

    申请日：1997-04-01

    Applicant: SONY CORP

    Inventor： TAKASAWA TAKEHARU ,  ITO HIROYUKI ,  SATO SHOJI ,  SETO HIDEKAZU ,  SUZUKI JUNICHI

    IPC: G11B7/00 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B19/12 ,  G11B7/085

    Abstract: An optical pickup device which assures interchangeability between plural types of optical discs (2a, 2b) with different layered structures, such as CD, CD-R or DVD, which is reduced in size and which realizes reproduction of high reliability information signals. The pickup device includes a light source (3, 4) for radiating laser light beams of different wavelengths in association with the plural types of the optical discs (2a, 2b) with different layered structures, an objective lens (5a, 5b) for converging the laser light beam radiated form the light source on the signal recording layer of the optical disc (2a, 2b), an objective lens switching mechanism (14) for switching and moving the objective lens (5a, 5b) to the recording/reproducing position, light splitting means (44; 77) for splitting the incident laser light beam from the light source from the reflected laserlight beam reflected from the optical disc, plural photodetectors (6, 4) for receiving the reflected laser light split by the light splitting means, and an optical system correction means (16) for correcting the objective lens.

    OPTICAL PICKUP DEVICE AND OPTICAL DISC REPRODUCING APPARATUS
    5.
    发明专利
    OPTICAL PICKUP DEVICE AND OPTICAL DISC REPRODUCING APPARATUS 未知

    公开(公告)号：MY115074A

    公开(公告)日：2003-03-31

    申请号：MYPI9701381

    申请日：1997-03-31

    Applicant: SONY CORP

    Inventor： TAKASAWA TAKEHARU ,  ITO HIROYUKI ,  SATO SHOJI ,  SETO HIDEKAZU ,  SUZUKI JUNICHI

    IPC: G11B7/00 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B19/12

    Abstract: AN OPTICAL PICKUP DEVICE WHICH ASSURES INTERCHANGEABILITY BETWEEN PLURAL TYPES OF OPTICAL DISCS (2A, 2B) WITH DIFFERENT LAYERED STRUCTURES, SUCH AS CD, CD-R OR DVD, WHICH IS REDUCED IN SIZE AND WHICH REALIZES REPRODUCTIONS OF HIGH RELIABILITY INFORMATION SIGNALS. THE PICKUP DEVICE INCLUDES A LIGHT SOURCE (3, 4) FOR RADIATING LASER LIGHT BEAMS OF DIFFERENT WAVE-LENGTHS IN ASSOCIATES WITH THE PLURAL TYPES OF THE OPTICAL DISCS (2A, 2B) WITH DIFFERENT LAYERED STRUCTURES, AN OBJECTIVE LENS (5A, 5B) FOR CONVERGING THE LASER LIGHT BEAM RADIATED FROM THE LIGHT SOURCE ON THE SIGNAL RECORDING LAYER OF THE OPTICAL DISC (2A, 2B), AN OBJECTIVE LENS SWITCHING MECHANISM (14) FOR SWITCHING AND MOVING THE OBJECTIVE LENS (5A, 5B) TO THE RECORDING/REPRODUCING POSITION, LIGHT SPLITTING MEANS (44, 47) FOR SPLITTING THE INCIDENT LASER LIGHT BEAM FROM THE LIGHT SOURCE FROM THE REFLECTED LASER LIGHT BEAM REFLECTED FROM THE OPTICAL DISC, PLURAL PHOTO DETECTORS (6, 4) FOR RECEIVING THE REFLECTED LASER LIGHT SPILT BY THE LIGHT SPLITTING MEANS, AND AN OPTICAL SYSTEM CORRECTION MEANS (16) FOR CORRECTING THE OBJECTIVE LENS (5A, 5B). FIG 6

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