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18 条记录 (耗时 0.013 秒)

    OBJECTIVE LENS, OPTICAL ELEMENT, OPTICAL PICK-UP APPARATUS AND OPTICAL INFORMATION RECORDING AND/OR REPRODUCING APPARATUS EQUIPPED THEREWITH
    2.
    发明公开
    OBJECTIVE LENS, OPTICAL ELEMENT, OPTICAL PICK-UP APPARATUS AND OPTICAL INFORMATION RECORDING AND/OR REPRODUCING APPARATUS EQUIPPED THEREWITH 审中-公开
    镜头镜头，光学元件，光学记录设备和光学信息记录和/或回放设备

    公开(公告)号：EP2919234A1

    公开(公告)日：2015-09-16

    申请号：EP15163546.3

    申请日：2002-10-11

    申请人： Konica Minolta Opto, Inc.

    发明人： Kimura, Tohru ,  Sakamoto, Katsuya ,  Atarashi, Yuichi

    IPC分类号： G11B7/135 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/1392 ,  G11B7/00 ,  G11B7/1372

    CPC分类号： G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength λ1, λ2 and λ3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: n ⁢ 1 > n ⁢ 2 , and n ⁢ 1 > n ⁢ 3 ,
    and
    the hybrid objective lens converges a n1-th, n2-th
    and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second and third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.

    摘要翻译： 一种混合物镜具有折射透镜和由多个同轴环形区的至少一个光学表面上构建它们的衍射光学元件。 当n 1，n2和n3各自为衍射光的具有各自的具有波长“1，” 2和“3的第一，第二和第三光束的衍射光中具有最大光量的衍射次数时respectivement光束来是 分别入射到所述衍射构造，下式得到满足：N¢1>ñ¢2，并且n¢1>ñ¢3和混合物镜会聚的第n1，第n2和n 3 个级衍射的第一，第二和第三光束的射线走上上信息记录的每一个第一，第二和第三光学信息记录介质的平面，以便在规定的respectivement必要的图象侧数值孔径内的适当的波阵面分别形成。

    OPTICAL INFORMATION REPRODUCING DEVICE, OPTICAL INFORMATION REPRODUCING METHOD, AND INTEGRATED CIRCUIT
    3.
    发明公开
    OPTICAL INFORMATION REPRODUCING DEVICE, OPTICAL INFORMATION REPRODUCING METHOD, AND INTEGRATED CIRCUIT 有权
    DEVICE光信息记录，方法光信息记录与集成电路THEREFOR

    公开(公告)号：EP2398019A4

    公开(公告)日：2014-11-19

    申请号：EP10741041

    申请日：2010-01-29

    申请人： PANASONIC CORP

    发明人： NARUMI KENJI ,  BIRUKAWA MASAHIRO

    IPC分类号： G11B7/09 ,  G11B7/004 ,  G11B7/005 ,  G11B7/085 ,  G11B7/1374 ,  G11B7/1387

    CPC分类号： G11B7/0908 ,  G11B7/08511 ,  G11B7/0945 ,  G11B7/1374 ,  G11B7/1387 ,  G11B2007/13727

    摘要： An optical information reproducing device is provided with a light focusing unit (8) for generating near-field light, a signal quality measuring circuit (22) for measuring reproduction signal quality of the optical information recording medium using the near-field light generated by the light focusing unit, a gap length determining circuit (17a) for determining a gap length between the light focusing unit and a surface of the optical information recording medium as a set value based on a measurement result on the reproduction signal quality in the signal quality measuring circuit, and a gap control circuit (24) for controlling a gap between the light focusing unit and the surface of the optical information recording medium based on the set value determined in the gap length determining circuit. Information is reproduced from the optical information recording medium using the near-field light generated by the light focusing unit.

    OPTICAL SYSTEM FOR HOLOGRAPHIC STORAGE AND DESIGN METHOD FOR FRESNEL LENS AND META LENS THEREOF
    5.
    发明公开
    OPTICAL SYSTEM FOR HOLOGRAPHIC STORAGE AND DESIGN METHOD FOR FRESNEL LENS AND META LENS THEREOF 审中-公开

    公开(公告)号：EP4148733A1

    公开(公告)日：2023-03-15

    申请号：EP22190206.7

    申请日：2022-08-12

    申请人： Amethystum Storage Technology Co., Ltd.

    发明人： HU, Dejiao ,  LIU, Yicheng ,  TIAN, Jun ,  TAO, Xiaoxiao

    IPC分类号： G11B7/1374 ,  G11B7/1378

    摘要： An optical system for holographic storage includes a reference light path (1), a signal light path, a servo light path (3) and a reproduction light path (4). The reference light path (1) and the signal light path (2) both contain a first Fourier lens (10) and a second Fourier lens (20) for transmitting reference light and signal light carrying data information, and adjusting the incident position and angle of the reference light and the signal light on a storage medium. The optical system further includes a reference light objective lens (50) for converging the reference light, a third Fourier lens (30) for performing Fourier transformation on a signal light field, and a fourth Fourier lens (40) for performing Fourier transformation on a reproduced signal light field to read the data information. The first Fourier lens (10), the second Fourier lens (20), the third Fourier lens (30), the fourth Fourier lens (40) and the reference light objective lens (50) is respectively a Fresnel lens or a meta lens.