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1.发明授权公开(公告)号：US08456978B2
公开(公告)日：2013-06-04
申请号：US13581733
申请日：2012-01-30
申请人： Yoshiaki Komma , Kazuhiro Minami
发明人： Yoshiaki Komma , Kazuhiro Minami
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B7/08511 , G11B7/1353 , G11B2007/0006
摘要： The present invention provides an objective lens, an optical head apparatus, an optical information apparatus, and an information processing apparatus that improve focal position detection accuracy. In order to reproduce information from an optical disk (28), an objective lens (25) collects a diffracted ray (15X) having a longer focal length, out of two diffracted rays (15X, 15Y), on an information recording surface (28L) via a base (28S) of the optical disk (28), and a distance (DF3) between the focal positions of the two diffracted rays (15X, 15Y) when the diffracted ray (15X) having a longer focal length is collected on the information recording surface (28S) is longer than double the distance (WD2) between the surface (25A) of the objective lens (25) and the surface (28A) of the base (28S) along the optical axis.
摘要翻译： 本发明提供一种提高焦点位置检测精度的物镜，光头装置，光信息装置和信息处理装置。 为了从光盘（28）再现信息，物镜（25）在信息记录表面（28L）上收集两个衍射光线（15X，15Y）中具有较长焦距的衍射光线（15X） ）经由光盘（28）的基座（28S）和当具有较长焦距的衍射光线（15X）收集在两个衍射光线（15X，15Y）上的焦点位置之间的距离（DF3） 所述信息记录表面（28S）比所述物镜（25）的表面（25A）与所述基座（28S）的沿所述光轴的表面（28A）之间的距离（WD2）的两倍长。
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公开(公告)号：US08681592B2
公开(公告)日：2014-03-25
申请号：US13396601
申请日：2012-02-15
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G02B27/0037 , G11B7/1275 , G11B7/1353 , G11B7/1367 , G11B2007/0006
摘要： An objective lens element having improved diffraction efficiency at least one of used wavelengths is provided. The objective lens element includes one surface including: a first region including an optical axis; and a second region surrounding the first region. A periodic first diffraction structure is formed on the first region, and a periodic second diffraction structure different from the first diffraction structure is formed on the second region. The objective lens element satisfies the following conditions. |A1−B1|
摘要翻译： 提供了具有提高的衍射效率的物镜元件中至少一种使用的波长。 物镜元件包括一个表面，包括：包括光轴的第一区域; 以及围绕所述第一区域的第二区域。 在第一区域上形成周期性的第一衍射结构，在第二区域上形成与第一衍射结构不同的周期性第二衍射结构。 物镜元件满足以下条件。 | A1-B1 | <| A2-B2 | （1）| B1 |≧| B2 | （2）这里，A1和B1分别是在记录表面上将第一波长的光和第二波长的光会聚的第一区域的衍射级，并且A2和B2分别是在第二区域处的会聚光 的第一波长和第二波长的光分别在记录表面上。
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3.发明申请公开(公告)号：US20130051204A1
公开(公告)日：2013-02-28
申请号：US13581733
申请日：2012-01-30
申请人： Yoshiaki Komma , Kazuhiro Minami
发明人： Yoshiaki Komma , Kazuhiro Minami
IPC分类号： G11B7/1353 , G11B19/00
CPC分类号： G11B7/1374 , G11B7/08511 , G11B7/1353 , G11B2007/0006
摘要： The present invention provides an objective lens, an optical head apparatus, an optical information apparatus, and an information processing apparatus that improve focal position detection accuracy. In order to reproduce information from an optical disk (28), an objective lens (25) collects a diffracted ray (15X) having a longer focal length, out of two diffracted rays (15X, 15Y), on an information recording surface (28L) via a base (28S) of the optical disk (28), and a distance (DF3) between the focal positions of the two diffracted rays (15X, 15Y) when the diffracted ray (15X) having a longer focal length is collected on the information recording surface (28S) is longer than double the distance (WD2) between the surface (25A) of the objective lens (25) and the surface (28A) of the base (28S) along the optical axis.
摘要翻译： 本发明提供一种提高焦点位置检测精度的物镜，光头装置，光信息装置和信息处理装置。 为了从光盘（28）再现信息，物镜（25）在信息记录表面（28L）上收集两个衍射光线（15X，15Y）中具有较长焦距的衍射光线（15X） ）经由光盘（28）的基座（28S）和当具有较长焦距的衍射光线（15X）收集在两个衍射光线（15X，15Y）上的焦点位置之间的距离（DF3） 所述信息记录表面（28S）比所述物镜（25）的表面（25A）与所述基座（28S）的沿所述光轴的表面（28A）之间的距离（WD2）的两倍长。
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4.发明申请OBJECTIVE LENS, OPTICAL HEAD, OPTICAL DISK APPARATUS, AND INFORMATION PROCESSING APPARATUS 有权目标镜头，光学头，光盘设备和信息处理设备公开(公告)号：US20120182852A1
公开(公告)日：2012-07-19
申请号：US13498270
申请日：2011-07-22
申请人： Fumitomo Yamasaki , Kazuhiro Minami , Yoshiaki Komma , Junichi Asada , Osamu Kajino , Noriaki Terahara , Toshiyasu Tanaka
发明人： Fumitomo Yamasaki , Kazuhiro Minami , Yoshiaki Komma , Junichi Asada , Osamu Kajino , Noriaki Terahara , Toshiyasu Tanaka
IPC分类号： G11B7/1353
CPC分类号： G11B7/1374 , G02B5/1895 , G11B7/1353 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： An objective lens, an optical head, an optical disk apparatus and an information processing apparatus which can suppress deterioration of a focal spot caused by a drop in the diffraction efficiency are provided. An inner circumference area (111) and an outer circumference area (113) converge a laser beam having an order of diffraction with which diffraction efficiency is highest, out of laser beams having a wavelength λ1 which are diffracted by the inner circumference area (111) and the outer circumference area (113), on an information recording surface of a first information recording medium; the inner circumference area (111) and a mid-circumference area (112) converge a laser beam having an order of diffraction with which diffraction efficiency is highest, out of the laser beams having a wavelength λ2 which are diffracted by the inner circumference area (111) and the mid-circumference area (112), on an information recording surface of a second information recording medium; and the diffraction efficiency of the laser beam having the wavelength λ2, which is diffracted by the mid-circumference area (112) and converges on the information recording surface of the second information recording medium, is greater than the diffraction efficiency of the laser beam having the wavelength λ1 which is diffracted by the mid-circumference area (112), and converges on the information recording surface of the first information recording medium.
摘要翻译： 提供了可以抑制由衍射效率下降引起的焦点劣化的物镜，光头，光盘装置和信息处理装置。 在由内周区域（111）衍射的具有波长λ1的激光束中，内圆周区域（111）和外周区域（113）会聚具有衍射效率最高的衍射级数的激光束， 和外周区域（113），位于第一信息记录介质的信息记录表面上; 在由内周区域衍射的具有波长λ2的激光束中，内圆周区域（111）和中周区域（112）会聚具有衍射效率最高的衍射级数的激光束（ 111）和中周区域（112），位于第二信息记录介质的信息记录表面上; 并且由中间圆周区域（112）衍射并会聚在第二信息记录介质的信息记录表面上的具有波长λ2的激光束的衍射效率大于具有 由中圆区域（112）衍射的波长λ1，并且会聚在第一信息记录介质的信息记录表面上。
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公开(公告)号：US20120207008A1
公开(公告)日：2012-08-16
申请号：US13396601
申请日：2012-02-15
IPC分类号： G11B7/1374 , G02B3/02
CPC分类号： G11B7/1374 , G02B27/0037 , G11B7/1275 , G11B7/1353 , G11B7/1367 , G11B2007/0006
摘要： An objective lens element having improved diffraction efficiency at least one of used wavelengths is provided. The objective lens element includes one surface including: a first region including an optical axis; and a second region surrounding the first region. A periodic first diffraction structure is formed on the first region, and a periodic second diffraction structure different from the first diffraction structure is formed on the second region. The objective lens element satisfies the following conditions. |A1−B1|
摘要翻译： 提供了具有提高的衍射效率的物镜元件中至少一种使用的波长。 物镜元件包括一个表面，包括：包括光轴的第一区域; 以及围绕所述第一区域的第二区域。 在第一区域上形成周期性的第一衍射结构，在第二区域上形成与第一衍射结构不同的周期性第二衍射结构。 物镜元件满足以下条件。 | A1-B1 | <| A2-B2 | （1）| B1 |≧| B2 | （2）这里，A1和B1分别是在记录表面上将第一波长的光和第二波长的光会聚的第一区域的衍射级，并且A2和B2分别是在第二区域处的会聚光 的第一波长和第二波长的光分别记录在记录表面上。
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6.发明授权公开(公告)号：US08432782B2
公开(公告)日：2013-04-30
申请号：US13498270
申请日：2011-07-22
申请人： Fumitomo Yamasaki , Kazuhiro Minami , Yoshiaki Komma , Junichi Asada , Osamu Kajino , Noriaki Terahara , Toshiyasu Tanaka
发明人： Fumitomo Yamasaki , Kazuhiro Minami , Yoshiaki Komma , Junichi Asada , Osamu Kajino , Noriaki Terahara , Toshiyasu Tanaka
CPC分类号： G11B7/1374 , G02B5/1895 , G11B7/1353 , G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： An objective lens, an optical head, an optical disk apparatus and an information processing apparatus which can suppress deterioration of a focal spot caused by a drop in the diffraction efficiency. Inner and outer circumference areas converge a laser beam, out of laser beams having a wavelength λ1 which are diffracted by the inner and outer circumference areas, on a first information recording medium; the inner circumference area and a mid-circumference area converge a laser beam, out of the laser beams having a wavelength λ2 which are diffracted by the inner circumference area and the mid-circumference area, on a second information recording medium; and the diffraction efficiency of the laser beam having the wavelength λ2 is greater than the diffraction efficiency of the laser beam having the wavelength λ1.
摘要翻译： 可以抑制由衍射效率下降引起的焦点劣化的物镜，光头，光盘装置和信息处理装置。 内外圆周区域在第一信息记录介质上会聚具有由内周区域和外周区域衍射的波长λ1的激光束的激光束; 在第二信息记录介质上，将由内周区域和中周区域衍射的具有波长λ2的激光束中的内圆周区域和中间圆周区域会聚在一起; 并且具有波长λ2的激光束的衍射效率大于具有波长λ1的激光束的衍射效率。
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公开(公告)号：US08611199B2
公开(公告)日：2013-12-17
申请号：US13248042
申请日：2011-09-29
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G02B5/1814 , G02B5/1876 , G11B7/1275 , G11B7/1353 , G11B7/13922 , G11B2007/0006
摘要： An optical pickup device is provided which is compatible with at least two types of optical disc standards having different NAs and which controls an effective NA when a light beam for an optical disc standard having a relatively small NA is converged, thereby forming a desired spot. An inner part 131B and an outer part 131F of an objective lens element 143 are provided with diffraction structures different from each other. A condition (1), DO11×DO12>0, and a condition (2), DO21×DO22
摘要翻译： 提供了一种光拾取装置，其与具有不同NAs的至少两种类型的光盘标准兼容，并且当具有相对较小的NA的光盘标准的光束会聚时，控制有效NA，从而形成所需的斑点。 物镜143的内部部分131B和外部部分131F设置有彼此不同的衍射结构。 满足条件（1），DO11×DO12> 0和条件（2），DO21×DO22 <0（DO11（DO21）是衍射效率最高的衍射光束的衍射级别 由内部衍射结构衍射的波长λ1（λ2）; DO12（DO22）是由衍射结构衍射的波长λ1（λ2）的光束之间衍射效率最高的衍射光束的衍射级数 在外部）。
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公开(公告)号：US08526292B2
公开(公告)日：2013-09-03
申请号：US13461094
申请日：2012-05-01
申请人： Yoshiaki Komma , Joji Anzai , Masahiko Tsukuda , Yasumori Hino
发明人： Yoshiaki Komma , Joji Anzai , Masahiko Tsukuda , Yasumori Hino
CPC分类号： G11B7/24038 , G11B7/0037 , G11B7/08511 , G11B7/26 , G11B2007/0013 , Y10T29/49
摘要： Shape-wise thicknesses of a cover layer and first through (N−1)th intermediate layers of an optical recording medium having refractive indexes nr1, nr2 are converted into thicknesses t1, t2 of the respective layers having a predetermined refractive index which makes a divergent amount equal to a divergent amount of a light beam resulting from the thicknesses tr1, tr2, a difference DFF between the sum of a thickness “ti” through a thickness “tj”, and the sum of a thickness “tk” through a thickness “tm” is set to 1 μm or more (where i, j, k, and m are each any positive integer satisfying i≦j
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9.发明授权Optical head, optical disc drive, computer, optical discplayer and optical disc recorder 有权光头，光盘驱动器，计算机，光盘播放器和光盘录像机公开(公告)号：US08477584B2
公开(公告)日：2013-07-02
申请号：US12015688
申请日：2008-01-17
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/131 , G11B7/1381 , G11B2007/0006 , G11B2007/0013
摘要： When performing a read or write operation on an optical disc with information storage layers, this compatible optical head with a two-focus lens can reduce interference caused by an unnecessary diffracted light reflected from a non-target layer and not contributing to reading or writing. The head reads and/or writes information from/on storage media, including first and second media with different protective substrate thicknesses, by irradiating a given one with a laser beam and includes: a diffraction element that diffracts the beam to produce diffracted light of multiple orders; an objective lens for converging nth and mth order ones of the light on the respective storage layers of the first and second media; a photodetector that receives the beam reflected from the medium and condensed; and a light shielding portion for preventing a portion of the beam reflected from the storage layer of the second medium and including its optical axis from reaching the photodetector. The light shielding portion is arranged so as to reduce loss to be caused by cutting off the portion of the beam to a predetermined value or less.
摘要翻译： 当在具有信息存储层的光盘上执行读取或写入操作时，具有双焦点透镜的兼容光学头可以减少由非目标层反射的不需要的衍射光引起的干扰，并且不会对读取或写入有贡献。 头通过用激光束照射给定的一个来读取和/或从存储介质（包括具有不同保护衬底厚度的第一介质和第二介质）读取和/或写入信息，并且包括：衍射元件，衍射光束以产生多个衍射光 命令; 用于在第一和第二介质的各个存储层上会聚第n个和第m个光的物镜; 光接收器，其接收从介质反射并聚焦的光束; 以及用于防止从第二介质的存储层反射并包括其光轴的光束的一部分到达光电检测器的遮光部分。 遮光部被配置为减少将光束的一部分切断而造成的损失为规定值以下。
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10.发明授权公开(公告)号：US08451708B2
公开(公告)日：2013-05-28
申请号：US13461070
申请日：2012-05-01
申请人： Yoshiaki Komma , Joji Anzai , Masahiko Tsukuda , Yasumori Hino
发明人： Yoshiaki Komma , Joji Anzai , Masahiko Tsukuda , Yasumori Hino
CPC分类号： G11B7/24038 , G11B7/0037 , G11B7/08511 , G11B7/26 , G11B2007/0013 , Y10T29/49
摘要： Shape-wise thicknesses of a cover layer and first through (N−1)th intermediate layers of an optical recording medium having refractive indexes nr1, nr2 are converted into thicknesses t1, t2 of the respective layers having a predetermined refractive index which makes a divergent amount equal to a divergent amount of a light beam resulting from the thicknesses tr1, tr2, a difference DFF between the sum of a thickness “ti” through a thickness “tj”, and the sum of a thickness “tk” through a thickness “tm” is set to 1 μm or more (where i, j, k, and m are each any positive integer satisfying i≦j
摘要翻译： 具有折射率nr1，nr2的光学记录介质的覆盖层和第一至第（N-1）个中间层的形状厚度被转换成具有预定折射率的各层的厚度t1，t2，其具有发散性 相当于由厚度tr1，tr2产生的光束的发散量，厚度“ti”与厚度“tj”之和的差DFF与厚度“tk”的厚度之和“ tm“设定为1mum以上（其中，i，j，k，m各自为满足i @ j
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