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    4.
    发明专利
    未知

    公开(公告)号：DE602004012989D1

    公开(公告)日：2008-05-21

    申请号：DE602004012989

    申请日：2004-04-20

    Applicant: KONICA MINOLTA OPTO INC

    Inventor： MORI NOBUYOSHI ,  KIMURA TOHRU

    IPC: G11B7/135 ,  G02B5/18 ,  G02B13/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1392

    Abstract: This invention is directed to an optical pickup apparatus which includes a first laser source which emits a first beam, a second laser source which emits a second beam having a polarization plane substantially perpendicular to a polarization plane of the first beam, a polarization diffraction element which selectively diffracts one of the first beam and the second beam in accordance with polarized states thereof, and an objective lens which records and/or reproduces information by focusing the first beam which has passed through the polarization diffraction element onto an information recording surface of a first optical information recording medium, and records and/or reproduces information by focusing the second beam which has passed through the polarization diffraction element onto an information recording surface of a second optical information recording medium.

    6.
    发明专利
    未知

    公开(公告)号：AT391989T

    公开(公告)日：2008-04-15

    申请号：AT04728407

    申请日：2004-04-20

    Applicant: KONICA MINOLTA OPTO INC

    Inventor： MORI NOBUYOSHI ,  KIMURA TOHRU

    IPC: G11B7/135 ,  G02B5/18 ,  G02B13/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1392

    Abstract: This invention is directed to an optical pickup apparatus which includes a first laser source which emits a first beam, a second laser source which emits a second beam having a polarization plane substantially perpendicular to a polarization plane of the first beam, a polarization diffraction element which selectively diffracts one of the first beam and the second beam in accordance with polarized states thereof, and an objective lens which records and/or reproduces information by focusing the first beam which has passed through the polarization diffraction element onto an information recording surface of a first optical information recording medium, and records and/or reproduces information by focusing the second beam which has passed through the polarization diffraction element onto an information recording surface of a second optical information recording medium.

    7.
    发明专利
    未知

    公开(公告)号：AT521965T

    公开(公告)日：2011-09-15

    申请号：AT05252748

    申请日：2005-05-04

    Applicant: KONICA MINOLTA OPTO INC

    Inventor： KIMURA TOHRU ,  SAKAMOTO KATSUYA

    IPC: G02B5/18 ,  G11B7/135 ,  G11B7/00 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/1392

    Abstract: An optical pick-up apparatus comprising: a first light source emitting a first light flux; a second light source emitting a second light flux; a third light source emitting a third light flux; and an optical element, wherein the optical element has a first optical surface having a first area including an optical axis of the optical element, and a second area positioned outside the first area, the second area includes a light-shielding structure being capable of substantially shielding the third light flux and being capable of transmitting the first light flux and the second light flux.

    Diffraction optical element, object optical system, optical pickup device and optical information recording/reproducing device
    8.
    发明专利
    Diffraction optical element, object optical system, optical pickup device and optical information recording/reproducing device 未知

    公开(公告)号：GB2414813B

    公开(公告)日：2007-03-14

    申请号：GB0518121

    申请日：2004-12-02

    Applicant: KONICA MINOLTA OPTO INC

    Inventor： KIMURA TOHRU

    IPC: G02B5/18 ,  G11B7/135 ,  G02B13/00 ,  G02B13/18 ,  G02B27/42 ,  G11B7/00 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/1392

    Abstract: A diffractive optical element, comprises a first diffractive structure to generate n 11 -th order diffracted ray when a first light flux having lambda1 (nm) of a wavelength comes in and to generate n 21 -th order diffracted ray (n 11 .>=n 21 ) when a second light flux having lambda2 (nm) (lambda2>lambda1) comes in; and a second diffractive structure to generate n 12 -th order diffracted ray when the first light flux comes in and to generate n 22 -th order diffracted ray (n 12 .>=n 22 ) when the second light comes in. The diffractive optical element satisfies the following formula: deltaphi A12 <>deltaphi B12 , where deltaphi A12 ={n 11 .lambda 1 /(N 11 -1)}/{n 21 .lambda 2 /(N 21 -1)}, and deltaphi B12 ={n 12 .lambda 1 /(N 12 -1)}/{n 22 .lambda 2 /(N 22 -1)}, wherein N 11 , N 21 are refractive index of the first diffractive structure respectively for lambda 1 and lambda 2 , and N 12 , N 22 are refractive index of the second diffractive structure respectively for lambda 1 and lambda 2 .

    10.
    发明专利
    未知

    公开(公告)号：AT497239T

    公开(公告)日：2011-02-15

    申请号：AT02254657

    申请日：2002-07-03

    Applicant: KONICA MINOLTA OPTO INC

    Inventor： KIMURA TOHRU

    IPC: G02B27/00 ,  G02B27/44 ,  G11B7/00 ,  G11B7/135

    Abstract: An aberration compensating optical element includes: a diffractive structure having a plurality of ring-shaped zone steps formed into substantially concentric circles on at least one surface of the aberration compensating optical element; wherein the aberration compensating optical element is adapted for being disposed on an optical path between a light source for emitting a light having a wavelength of not more than 550nm, and an objective lens made of a material having an Abbe constant of not more than 95.0 at a d-line; and wherein the following inequality is satisfied: P »1

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