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    OPTICAL DISK DEVICE AND RECORDING/PLAYBACK DEVICE
    1.
    发明公开
    OPTICAL DISK DEVICE AND RECORDING/PLAYBACK DEVICE 审中-公开

    公开(公告)号：EP4231297A1

    公开(公告)日：2023-08-23

    申请号：EP21879942.7

    申请日：2021-10-06

    申请人： Panasonic Intellectual Property Management Co., Ltd.

    发明人： KUZE, Yuuichi ,  YAJIMA, Masatoshi ,  KONISHI, Shinichi ,  NISHIOKA, Akihiko

    IPC分类号： G11B7/004 ,  G11B7/005 ,  G11B7/095 ,  G11B7/125 ,  G11B7/1275

    摘要： An optical disc device (2) includes: an optical pickup (4) including a first laser light source (10) that emits laser light, an objective lens (24) that focuses the laser light emitted from the first laser light source (10) onto an optical disc (8), and a light receiving element (30) that receives reflected light from the optical disc (8), and performs photoelectric conversion on the reflected light received to output a received-light signal; an FS signal generator (54) that generates an FS signal indicating the light amount of the reflected light from the optical disc (8), based on the received-light signal from the light receiving element (30); and a dirt determiner (56) that determines that dirt is present in the optical pickup (4), when the peak level of the FS signal is less than a dirt determination threshold, and controls the light receiving element (30) to increase the peak level of the received-light signal from the light receiving element (30).

    OPTICAL RECORDING/REPRODUCTION METHOD, OPTICAL RECORDING/REPRODUCTION DEVICE AND PROGRAM
    4.
    发明授权
    OPTICAL RECORDING/REPRODUCTION METHOD, OPTICAL RECORDING/REPRODUCTION DEVICE AND PROGRAM 有权
    光学记录/回放，光学记录/重放设备和程序

    公开(公告)号：EP2256728B1

    公开(公告)日：2012-09-05

    申请号：EP09723559.2

    申请日：2009-02-24

    申请人： Panasonic Corporation

    发明人： ITO, Eiichi ,  BIRUKAWA, Masahiro

    IPC分类号： G11B7/085 ,  G11B7/007 ,  G11B7/095 ,  G11B7/135 ,  G11B7/24

    CPC分类号： G11B7/0908 ,  G11B7/0956 ,  G11B7/1374 ,  G11B7/1387 ,  G11B7/24038 ,  G11B2007/13727

    摘要： In optical recording and/or reproduction using an SIL optical system that performs a tilt servo using light for recording and/or reproduction, the SIL and an optical recording medium have a high probability of colliding with each other before the tilt servo is started. To prevent the collision, an optical recording/reproduction method performs a gap servo that controls a gap between a surface of an optical recording medium and a bottom surface of an SIL using reflected light that is generated from light traveling from the bottom surface of the SIL and reflecting on the optical recording medium, a focus servo that controls a distance between a focal point of the light and the bottom surface of the SIL, and a tilt servo that controls a tilt of the bottom surface of the SIL relative to the surface of the optical recording medium using the reflected light. The method includes the acts (A), (B), and (C), which are performed sequentially: (A) starting the gap servo with the gap being set larger than when optical recording and/or reproduction is performed, and shifting the focal point to an optical recording medium side from the bottom surface of the SIL, (B) starting the tilt servo, and (C) setting the gap smaller and arranging the SIL at a predetermined position.

    Optical disk device
    7.
    发明公开
    Optical disk device 有权
    Optische Plattenvorrichtung

    公开(公告)号：EP2333773A1

    公开(公告)日：2011-06-15

    申请号：EP11002841.2

    申请日：2006-03-16

    申请人： Panasonic Corporation

    发明人： Sato, Takahiro ,  Watanabe, Katsuya

    IPC分类号： G11B7/085 ,  G11B7/135 ,  G11B7/24 ,  G11B7/12 ,  G11B7/09 ,  G11B7/095

    CPC分类号： G11B7/08505 ,  G11B7/08588 ,  G11B7/121 ,  G11B7/24

    摘要： An optical disk drive according to the present invention includes: an optical pickup 6 including a light source 23 that radiates a light beam 21 to irradiate an optical disk 100, at least one objective lens 22 for converging the beam 21, and an actuator that can move the lens 22 perpendicularly to the disk 100; a transport stage 11 for displacing the pickup 6 in a disk radial direction; a rim detecting section 30 for sensing if the irradiated position of the beam 21 has passed an outer edge of the disk 100 while the pickup 6 is being displaced from an inner area of the disk toward the outer edge thereof to conduct a seek operation; and a control section 40 for getting the lens 22 retracted away from the disk 100 by the actuator and getting the pickup 6 displaced toward the inner area of the disk by the transport stage 11 if the irradiated position of the light beam 21 has been sensed to have passed the outer edge of the disk 100.

    摘要翻译： 根据本发明的光盘驱动器包括：光拾取器6，其包括照射光束21以照射光盘100的光源23，用于会聚光束21的至少一个物镜22和可以使光束21收敛的致动器 将透镜22垂直于盘100移动; 用于使拾取器6沿盘径向移位的传送台11; 边缘检测部分30，用于在拾取器6从盘的内部区域向其外边缘移动时，检测光束21的照射位置是否已经通过盘100的外边缘以进行寻道操作; 以及控制部分40，用于使透镜22通过致动器从光盘100缩回，并且如果已经感测到光束21的照射位置，并且使得拾取器6由传送台11朝向盘的内部区域移动 已经通过盘100的外边缘。

    OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING DEVICE, AND SIGNAL DETECTION METHOD
    8.
    发明公开
    OPTICAL HEAD DEVICE, OPTICAL INFORMATION PROCESSING DEVICE, AND SIGNAL DETECTION METHOD 审中-公开
    OPTISCHER KOPF，VORRICHTUNG ZUR VERARBEITUNG OPTISCHER INFORMATIONEN UND SIGNALERKENNUNGSVERFAHREN

    公开(公告)号：EP2293297A1

    公开(公告)日：2011-03-09

    申请号：EP09769819.5

    申请日：2009-01-06

    申请人： Panasonic Corporation

    发明人： YAMAMOTO, Hiroaki ,  ONO, Masayuki ,  NISHIMOTO, Masahiko

    IPC分类号： G11B7/095 ,  G11B7/135

    CPC分类号： G11B7/13922 ,  G11B7/094 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

    摘要： An optical head device includes a light source (30) configured to emit a light beam, a light collecting optical system configured to converge the light beam onto an information recording medium (10), a hologram element (20) configured to diffract the light beam reflected from the information recording medium (10), and a photodetector (40) having a plurality of detection regions configured to receive the light beam diffracted by the hologram element (20). The hologram element (20) has two diffraction regions (261 and 262) separated from each other by a straight line (260) extending in a radial direction of the information recording medium (10). At least one of the two diffraction regions has a pattern which introduces coma aberration in the radial direction. The light diffracted by the diffraction region having the coma aberration has coma aberration in the radial direction.

    摘要翻译： 一种光头装置，包括被配置为发射光束的光源（30），被配置为将光束会聚到信息记录介质（10）上的光收集光学系统;全息元件（20），被配置为衍射光束 从信息记录介质（10）反射的光检测器（40）和具有多个检测区域的光电检测器（40），被配置为接收由全息元件（20）衍射的光束。 全息元件（20）具有沿着信息记录介质（10）的径向延伸的直线（260）彼此分开的两个衍射区域（261和262）。 两个衍射区域中的至少一个具有在径向上引入彗形像差的图案。 由具有彗形像差的衍射区域衍射的光在径向具有彗差。