公开(公告)号：US09484054B2

公开(公告)日：2016-11-01

申请号：US14848882

申请日：2015-09-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kanji Wakabayashi ,  Kousei Sano ,  Fumitomo Yamasaki ,  Yoshiaki Komma ,  Toshiyasu Tanaka

IPC: G11B7/005 ,  G11B7/1374 ,  G11B7/0037 ,  G11B7/007 ,  G11B7/1381 ,  G11B7/1395 ,  G11B20/10 ,  G11B7/24073 ,  G11B7/1353

CPC classification number: G11B7/1374 ,  G11B7/0037 ,  G11B7/005 ,  G11B7/00718 ,  G11B7/1353 ,  G11B7/1381 ,  G11B7/1395 ,  G11B7/24073 ,  G11B20/10027 ,  G11B2007/00709

Abstract: An optical disc information device is an optical disc information device for reproducing and/or recording information with respect to an optical disc including a track in the form of a groove, and capable of recording information in a land portion and in a groove portion of the groove. The optical disc information device includes a laser light source, an objective lens, a transmittance limiting element, a dividing element, a light detector, a central amplifier, at least two end amplifiers, a gain controller, an adder, a reproduction signal processor, and a control signal processor. The transmittance limiting element includes a first central region, and at least two first end regions which interpose the first central region therebetween, and attenuates light passing through at least the first end regions out of a light flux emitted from the laser light source more strongly than light passing through the first central region.

Abstract translation: 光盘信息设备是用于再现和/或记录关于包括凹槽形式的轨道的光盘的信息的光盘信息设备，并且能够将信息记录在接地部分和凹槽部分的槽部分中 槽。 光盘信息装置包括激光源，物镜，透光率限制元件，分割元件，光检测器，中央放大器，至少两个末端放大器，增益控制器，加法器，再现信号处理器， 和控制信号处理器。 透光率限制元件包括第一中心区域和至少两个第一端部区域，其中插入第一中心区域，并且使从激光光源发射的光束中至少穿过至少第一端部区域的光更强烈地比通过 光穿过第一个中心区域。

公开(公告)号：US08953428B2

公开(公告)日：2015-02-10

申请号：US14352188

申请日：2012-10-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Fumitomo Yamasaki ,  Kazuhiro Minami ,  Yoshiaki Komma

IPC: G11B7/135 ,  G11B7/1374 ,  G02B5/18 ,  G11B7/1353 ,  G11B7/1392 ,  G11B7/1376 ,  G11B7/00

CPC classification number: G11B7/1374 ,  G02B5/1895 ,  G11B7/1353 ,  G11B7/1376 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

Abstract: Assuming that third-order coma aberration per unit angle generated by tilt of BD (60) in recording or reproducing information on or from BD (60) is CMDbd, third-order coma aberration per unit angle generated by tilt of CD (80) in recording or reproducing information on or from CD (80) is CMDcd, third-order coma aberration per unit angle generated by tilt of a compatible objective lens (8) in recording or reproducing information on or from BD (60) is CMLbd, and third-order coma aberration per unit angle generated by tilt of the compatible objective lens (8) in recording or reproducing information on or from CD (80) is CMLcd, a sine condition deviation amount (SCbd) in recording or reproducing information on or from BD (60) is expressed by CMDbd+CMLbd, a sine condition deviation amount (SCcd) in recording or reproducing information on or from CD (80) is expressed by CMDcd+CMLcd, and the sine condition deviation amount (SCbd) and the sine condition deviation amount (SCcd) satisfy SCbd>0 and SCcd

Abstract translation: 假设BD（60）在BD（60）上记录或再现信息时由BD（60）的倾斜产生的每单位角度的三阶彗差为CMDbd，则通过CD（80）的倾斜产生的每单位角度的三阶彗形像差 在CD（80）上或从CD（80）上记录或再现信息是CMDcd，在BD（60）上记录或再现信息时兼容物镜（8）的倾斜产生的每单位角度的三阶彗形像差是CMLbd，第三 在CD（80）上或从CD（80）记录或再现信息时由兼容物镜（8）的倾斜产生的每单位角度的单位角度的顺序彗差为CMLcd，在BD上记录或再现信息的正弦条件偏差量（SCbd） （60）由CMDbd + CMLbd表示，在CD（80）上或从CD（80）记录或再现信息的正弦条件偏差量（SCcd）由CMDcd + CMLcd表示，正弦条件偏差量（SCbd）和正弦条件 偏差量（SCcd）满足SCbd> 0a nd SCcd <0。

公开(公告)号：US09418695B2

公开(公告)日：2016-08-16

申请号：US14971326

申请日：2015-12-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Fumitomo Yamasaki ,  Kousei Sano ,  Yoshiaki Komma ,  Kanji Wakabayashi ,  Toshiyasu Tanaka

IPC: G11B7/135 ,  G11B7/1353 ,  G11B7/1395 ,  G11B7/005 ,  G11B7/131 ,  G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/005 ,  G11B7/131 ,  G11B7/1395 ,  G11B20/10009 ,  G11B20/10046 ,  G11B2007/0013

Abstract: An RF hologram is divided in a direction perpendicular to a tangent line of an information track of an information recording surface of an optical disc, and includes a central region including an optical axis of laser light as well as a first end portion region and a second end portion region which sandwich the central region, the central region is formed by a binary diffraction grating and generates ±1 order diffracted light, the first end portion region is formed by a blazed diffraction grating and generates first +1 order diffracted light, the second end portion region is formed by a blazed diffraction grating and generates second +1 order diffracted light, and an RF light receiving element receives both the ±1 order diffracted light, the first +1 order diffracted light, and the second +1 order diffracted light.

Abstract translation: RF全息图在与光盘的信息记录表面的信息轨道的切线垂直的方向上分割，并且包括包括激光的光轴的中心区域以及第一端部区域，以及第二 夹着中心区域的端部区域，中央区域由二元衍射光栅形成，产生±1级衍射光，第一端部区域由闪耀的衍射光栅形成，产生第一+1级衍射光，第二 端部区域由闪耀的衍射光栅形成，并产生第二+1级衍射光，RF光接收元件接收±1级衍射光，第一+1级衍射光和第二+1级衍射光 。

公开(公告)号：US20150138942A1

公开(公告)日：2015-05-21

申请号：US14403248

申请日：2013-05-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kanji Wakabayashi ,  Kousei Sano ,  Yoshiaki Komma

IPC: G11B7/007 ,  G11B20/10

CPC classification number: G11B7/00718 ,  G11B7/005 ,  G11B7/0901 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1381 ,  G11B20/10027 ,  G11B20/10212 ,  G11B2007/00709

Abstract: An optical disk information device includes a laser light source that emits a luminous flux with a wavelength λ, an objective lens having a numerical aperture NA, a splitting element, a photodetector, a central portion amplifier, at least two end portion amplifiers, an adder, a control signal processing section having as tracking switcher that inverts a polarity of a tracking control signal depending on whether a track scanned by a condensing spot corresponds to a land portion or a groove portion, and a gain controller that, when the polarity of the tracking control signal is inverted, switches gains of the central portion amplifier and the end portion amplifiers and sets the gain of the central portion amplifier substantially lower than the gain of at least one of the end portion amplifiers so as to reduce crosstalk from adjacent tracks in the optical disk. When a groove pitch in the optical disk is denoted by Gp, (Gp/2)

Abstract translation: 光盘信息装置包括发射波长为λ的光束的激光源，具有数值孔径NA的物镜，分割元件，光电检测器，中央部分放大器，至少两个端部放大器，加法器 具有跟踪切换器的控制信号处理部分，其根据由聚光点扫描的轨道是否对应于陆地部分或凹槽部分而使跟踪控制信号的极性反转;以及增益控制器，当所述跟踪控制信号的极性 跟踪控制信号反转，切换中央部分放大器和端部放大器的增益，并设置中央部分放大器的增益，基本上比端部放大器中的至少一个放大器的增益低，以便减少相邻轨道的串扰 光盘。 当光盘中的槽间距用Gp表示时，（Gp / 2）<（1.2·λ）/（2·NA）被满足。

公开(公告)号：US11475917B2

公开(公告)日：2022-10-18

申请号：US16963575

申请日：2019-10-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshiaki Komma ,  Yasushi Kobayashi ,  Kazuhiro Minami

IPC: G11B7/139 ,  G11B7/1374 ,  G02B13/18 ,  G11B7/0045

Abstract: Provided is an objective lens which is used so that more information can be accumulated in a large-capacity optical disk and which has a further enhanced numerical aperture NA. The objective lens is a single lens having the numerical aperture NA and a refractive index n, and is configured so as to satisfy: NA≥0.91 and 1.61≤n

公开(公告)号：US11430479B2

公开(公告)日：2022-08-30

申请号：US16963575

申请日：2019-10-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshiaki Komma ,  Yasushi Kobayashi ,  Kazuhiro Minami

IPC: G11B7/139 ,  G11B7/1374 ,  G02B13/18 ,  G11B7/0045

Abstract: Provided is an objective lens which is used so that more information can be accumulated in a large-capacity optical disk and which has a further enhanced numerical aperture NA. The objective lens is a single lens having the numerical aperture NA and a refractive index n, and is configured so as to satisfy: NA≥0.91 and 1.61≤n

公开(公告)号：US09508379B2

公开(公告)日：2016-11-29

申请号：US15049424

申请日：2016-02-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kousei Sano ,  Yoshiaki Komma ,  Fumitomo Yamasaki ,  Kanji Wakabayashi

IPC: G11B7/135 ,  G11B7/1374 ,  G11B7/09 ,  G11B7/13 ,  G11B7/1353 ,  G11B7/1395

CPC classification number: G11B7/1353 ,  G11B7/0901 ,  G11B7/0904 ,  G11B7/0943 ,  G11B7/131

Abstract: A recording device of the present disclosure includes a light source, an objective lens, a beam splitter, an optical element, a detector and an operation circuit. The optical element divides a light beam into a first main region, a second main region, a first main end region, a second main end region, a first sub-region, and a second sub-region. The operation circuit generates a main signal in which a first main end region signal is multiplied by a coefficient a and added to the first main region signal, and a second main signal in which a second main end region signal is multiplied by the coefficient α and added to the second main region signal.

Abstract translation: 本公开的记录装置包括光源，物镜，分束器，光学元件，检测器和操作电路。 光学元件将光束分为第一主区域，第二主区域，第一主端区域，第二主端区域，第一子区域和第二子区域。 运算电路产生主信号，其中第一主端区域信号乘以系数α并相加于第一主区信号;以及第二主信号，其中第二主端区信号乘以系数α和 添加到第二主区域信号。

公开(公告)号：US09196286B2

公开(公告)日：2015-11-24

申请号：US14403248

申请日：2013-05-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kanji Wakabayashi ,  Kousei Sano ,  Yoshiaki Komma

IPC: G11B7/09 ,  G11B7/007 ,  G11B7/095 ,  G11B7/1353 ,  G11B20/10 ,  G11B7/1381

CPC classification number: G11B7/00718 ,  G11B7/005 ,  G11B7/0901 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0956 ,  G11B7/1353 ,  G11B7/1381 ,  G11B20/10027 ,  G11B20/10212 ,  G11B2007/00709

Abstract: An optical disk information device includes a laser light source that emits a luminous flux with a wavelength λ, an objective lens having a numerical aperture NA, a splitting element, a photodetector, a central portion amplifier, at least two end portion amplifiers, an adder, a control signal processing section having a tracking switcher that inverts a polarity of a tracking control signal depending on whether a track scanned by a condensing spot corresponds to a land portion or a groove portion, and a gain controller that, when the polarity of the tracking control signal is inverted, switches gains of the central portion amplifier and the end portion amplifiers and sets the gain of the central portion amplifier substantially lower than the gain of at least one of the end portion amplifiers so as to reduce crosstalk from adjacent tracks in the optical disk.

Abstract translation: 光盘信息装置包括发射波长为λ的光束的激光源，具有数值孔径NA的物镜，分割元件，光电检测器，中央部分放大器，至少两个端部放大器，加法器 控制信号处理部分，具有跟踪切换器，其根据由聚光点扫描的光道是否对应于岸台部分或凹槽部分，反转跟踪控制信号的极性;以及增益控制器，当所述跟踪控制信号的极性 跟踪控制信号反转，切换中央部分放大器和端部放大器的增益，并设置中央部分放大器的增益，基本上比端部放大器中的至少一个放大器的增益低，以便减少相邻轨道的串扰 光盘。

公开(公告)号：US08995246B2

公开(公告)日：2015-03-31

申请号：US14350673

申请日：2013-08-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Fumitomo Yamasaki ,  Yoshiaki Komma

IPC: G11B7/135 ,  G11B7/1353 ,  G11B7/085 ,  G11B7/09 ,  G02B5/18 ,  G11B7/1374

CPC classification number: G11B7/1353 ,  G02B5/1876 ,  G11B7/085 ,  G11B7/08511 ,  G11B7/09 ,  G11B7/135 ,  G11B7/1374 ,  G11B2007/0006

Abstract: An objective lens (101) is configured to converge laser light of a first wavelength λ1 (390 [nm]≦λ1≦430 [nm]), laser light of a second wavelength λ2 (630 [nm]≦λ2≦680 [nm]), and laser light of a third wavelength λ3 (750 [nm]≦λ3≦810 [nm]) on an information recording surface of a first information recording medium, an information recording surface of a second information recording medium, and an information recording surface of a third information recording medium, and is configured such that the distance from a convergent point of normal diffracted order light, to a virtual collecting point formed by virtual diffracted order light between the convergent point of normal diffracted order light and a collecting point of unwanted diffracted order light is twice or more of the pull-in range of a focus error signal to be obtained in recording or reproducing information with respect to the third information recording medium.

Abstract translation: 物镜（101）被配置为会聚第一波长λ1（390 [nm]＆nlE;λ1＆nlE; 430 [nm]）的激光，第二波长λ2（630 [nm]＆nlE;λ2＆ nm]）和在第一信息记录介质的信息记录表面上的第三波长λ3（750 [nm]＆nlE;λ3＆nlE; 810 [nm]）的激光，第二信息记录介质的信息记录表面和 第三信息记录介质的信息记录表面，并且被配置为使得从正常衍射级光的会聚点到正常衍射级光的会聚点和虚拟衍射光之间形成的虚拟聚光点的距离 不想要的衍射光的收集点是在相对于第三信息记录介质的记录或再现信息中要获得的聚焦误差信号的拉入范围的两倍或更多。

公开(公告)号：US11335372B2

公开(公告)日：2022-05-17

申请号：US17360256

申请日：2021-06-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tsuyoshi Nakasendo ,  Yoshiaki Komma

IPC: G11B7/135 ,  G11B7/1374 ,  G11B7/09 ,  G11B7/127

Abstract: An optical disk reproducing device includes a division element that divides a reflected light reflected and diffracted by an optical disk into a light flux in a central region and light fluxes in end regions; a photodetector that has a central light receiver that receives the light flux in the central region and at least two end light receivers that receive the light fluxes in the end regions, and outputs a light amount signal corresponding to a light amount of each of the received light fluxes; a non-linear processor that receives each of the light amount signals from the central light receiver and the end light receivers, and outputs linear signals and non-linear signals obtained by processing the light amount signals by linear and non-linear arithmetic operations; an equalization processor that receives the linear signals and the non-linear signals and outputs signals each amplified with a predetermined gain; an adder that adds the amplified signals and outputs an equalization signal; a reproduction signal processor that processes the equalization signal and outputs a reproduction signal and an equalization error signal; and a gain controller that receives the equalization error signal and controls an amplification gain of the non-linear signals.