中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

10 records (took 0.008 seconds)

    OPTICAL PICKUP, OPTICAL DISC DRIVE AND OPTICAL INFORMATION DEVICE
    3.
    发明公开
    OPTICAL PICKUP, OPTICAL DISC DRIVE AND OPTICAL INFORMATION DEVICE 审中-公开
    OPTICAL客户光盘驱动器和光信息装置

    公开(公告)号：EP1993092A4

    公开(公告)日：2009-04-01

    申请号：EP07707245

    申请日：2007-01-23

    Applicant: PANASONIC CORP

    Inventor： MATSUZAKI KEIICHI ,  KOMMA YOSHIAKI ,  TANAKA TOSHIYASU ,  SANO KOUSEI ,  WAKABAYASHI KANJI ,  WADA HIDENORI

    IPC: G11B7/135

    CPC classification number: G11B7/1353 ,  G11B7/1362 ,  G11B7/1376 ,  G11B7/13925 ,  G11B2007/0013

    Abstract: A small optical pickup having a wide correction range of spherical aberration. The optical pickup comprises a rising mirror (4) for deflecting a light beam approximately perpendicularly and leading it toward the plane of incidence of an objective lens, a spherical aberration correction lens (2) having a curvature larger on one side than on the other side, a lens holder (9) for holding the spherical aberration correction lens (2) such that the plane of larger curvature projects partially to the rising mirror side, guide members (11, 42, 72) extending in the direction of optical axis (L) of a spherical aberration correction lens (s) and having an end arranged up to the side of the plane of reflection of the rising mirror (4), and portions (15, 36, 16d) sliding along the guide members (11, 42, 72). The projecting portions of the sliding portions (15, 36, 16d) are arranged to be confined in the side face of the reflective plane of the rising mirror (4), and when the spherical aberration correction lens (2) most closely approaches the rising mirror (4), the portion of the spherical aberration correction lens projecting from the lens holder overlaps the reflective plane of the rising mirror (4).

    OPTICAL INFORMATION MEDIUM MEASURING METHOD, OPTICAL INFORMATION MEDIUM, RECORDING DEVICE AND REPRODUCING DEVICE
    5.
    发明公开
    OPTICAL INFORMATION MEDIUM MEASURING METHOD, OPTICAL INFORMATION MEDIUM, RECORDING DEVICE AND REPRODUCING DEVICE 审中-公开
    测量方法的一种光信息媒介，光信息介质，记录装置和再生装置

    公开(公告)号：EP2325841A4

    公开(公告)日：2014-08-27

    申请号：EP09812923

    申请日：2009-09-14

    Applicant: PANASONIC CORP

    Inventor： SANO KOUSEI ,  KOMMA YOSHIAKI ,  HINO YASUMORI

    IPC: G11B7/26 ,  G11B7/005 ,  G11B7/24

    CPC classification number: G11B7/268 ,  G11B7/00375 ,  G11B2007/0013

    Abstract: An optical information medium measurement method of the present invention, for measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers, includes a first step of measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, a second step of obtaining a thickness between layers of the optical information medium, a third step of obtaining a reflectance of each layer of the optical information medium, and a fourth step of converting the modulation degree of each layer, the modulation degree being measured in the first step, into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the thickness between layers, the thickness being obtained in the second step, and a value indicative of the reflectance of each layer, the reflectance being obtained in the third step.

    OPTICAL PICKUP DRIVE DEVICE AND OPTICAL PICKUP FOCUS PULL-IN METHOD
    6.
    发明公开
    OPTICAL PICKUP DRIVE DEVICE AND OPTICAL PICKUP FOCUS PULL-IN METHOD 有权
    光驱本客户与光学客户聚焦牵引-PROCESS

    公开(公告)号：EP1619677A4

    公开(公告)日：2009-04-29

    申请号：EP04788448

    申请日：2004-09-29

    Applicant: PANASONIC CORP

    Inventor： KOMMA YOSHIAKI ,  YOSHIKAWA AKIRA

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

    CPC classification number: G11B7/0945 ,  G11B7/08511 ,  G11B19/127 ,  G11B2007/0006 ,  G11B2007/0013

    Abstract: It is possible to access a deep layer of a multi-layered disc in a short time. An objective lens (131) is moved toward a recording surface. When it is detected that the level voltage of a focus error signal has reached a first slice level voltage H displaced from a reference potential E by a predetermined value, the objective lens (131) is moved toward the recording surface by a predetermined shift amount as an upper limit. When the shift amount of the objective lens (131) has reached the predetermined shift amount, movement means is controlled to move the objective lens (131) apart from recording surface. When it is detected that the level voltage of the focus error signal has reached a second slice level voltage H displaced from the reference potential E by a predetermined value while the objective lens (131) moves apart from the recording surface, pull-in control is performed for focusing the light spot.

    OPTICAL RECORDING MEDIUM AND OPTICAL INFORMATION DEVICE
    7.
    发明公开
    OPTICAL RECORDING MEDIUM AND OPTICAL INFORMATION DEVICE 审中-公开
    记录介质与光信息技术光学设备

    公开(公告)号：EP2367172A4

    公开(公告)日：2012-05-23

    申请号：EP09825900

    申请日：2009-11-11

    Applicant: PANASONIC CORP

    Inventor： KOMMA YOSHIAKI ,  ANZAI JOJI ,  TSUKUDA MASAHIKO ,  HINO YASUMORI

    IPC: G11B7/24 ,  G11B7/085 ,  G11B7/135

    CPC classification number: G11B7/24038 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13925 ,  G11B2007/0013

    Abstract: An object of the invention is to provide an optical recording medium and an optical information device that enable to improve the quality of a servo signal and a reproduction signal. In the case where shape-wise thicknesses tr1, tr2, tr3, and tr4 of a cover layer (42), a first intermediate layer (43), a second intermediate layer (44), and a third intermediate layer (45) are respectively converted into thicknesses t1, t2, t3, and t4 of the respective corresponding layers each having a predetermined refractive index "no", a defocus amount with respect to a layer having a refractive index nr± and a thickness tr± (satisfying: 1‰¦±‰¦n (where ± is a positive integer and n is an integer of 4 or more)), and a defocus amount with respect to a layer having the refractive index "no" and a thickness t ± (satisfying: 1 ‰¦5±‰¦n (where ± is a positive integer and n is an integer of 4 or more)) are equal to each other; and the thicknesses t1, t2, t3, and t4 satisfy |t1-(t2+t3+t4)|‰§1 µm, a difference between any two values of the thicknesses t1, t2, t3, and t4 is set to 1 µm or more in any case, and |(t1+t2)-(t3+t4)|‰§1 µm.

    LENS SUPPORT MECHANISM, OPTICAL HEAD DEVICE AND OPTICAL INFORMATION PROCESSOR
    10.
    发明公开
    LENS SUPPORT MECHANISM, OPTICAL HEAD DEVICE AND OPTICAL INFORMATION PROCESSOR 审中-公开
    透镜保持机构，光学头装置和光学信息处理机

    公开(公告)号：EP1511022A4

    公开(公告)日：2008-12-24

    申请号：EP03730561

    申请日：2003-05-22

    Applicant: PANASONIC CORP

    Inventor： MORI EISHIN ,  ANZAI JOUJI ,  HAYASHI HIDEKI ,  KOMMA YOSHIAKI

    IPC: G11B7/08 ,  G11B7/00 ,  G11B7/1376 ,  G11B7/135

    CPC classification number: G11B7/123

    Abstract: A lens support mechanism including a semiconductor laser 10 for emitting a laser beam, an optical head enclosure 3 to which the semiconductor laser 10 is fixed and located, a collimator lens 21 disposed coaxially with the laser beam emitted from the semiconductor laser 10, a resin cylinder 22 formed in a cylindrical shape so as to fix and locate the collimator lens 21 to the inner surface thereof, and a cylindrical member 23 fitted to the resin cylinder 22 on a side of the collimator lens 21 opposite to the semiconductor laser 10 and formed so as to be fixed to the optical head enclosure 3. The cylindrical member 23 has almost the same linear expansion coefficient as that of the optical head enclosure 3.

Patent Agency Ranking