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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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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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3.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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4.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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5.发明申请COMPOUND OBJECTIVE LENS, OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, AND INFORMATION PROCESSING DEVICE 有权化合物目标透镜，光学头装置，光信息装置和信息处理装置公开(公告)号：US20120023514A1
公开(公告)日：2012-01-26
申请号：US13257380
申请日：2011-01-07
IPC分类号： G02B27/42 , G11B17/028 , G11B7/13
CPC分类号： G11B7/13922 , G11B7/1353 , G11B7/1374 , G11B7/1376 , G11B7/13925 , G11B2007/0006 , G11B2007/13727
摘要： A compound objective lens, an optical head device, an optical information device, and an information processing device that can inhibit the occurrence of aberration even when a light beam source wavelength shifts from the designed value. A diffraction structure having a sawtooth or stepwise cross section is formed in the region (R10) and region (R20). The height of the sawtooth or stepwise cross section formed in the region (R10) provides a light beam, which has a predetermined wavelength, with a difference in optical path length of N times the predetermined wavelength, as compared with a case of propagation in air. The height of the sawtooth or stepwise cross section formed in the region (R20) provides the light beam, which has the predetermined wavelength, with a difference in optical path length of J times the predetermined wavelength, as compared with a case of propagation in air. At least one of the difference in height between both ends of a boundary band (RB) provided between the region (R10) and the region (R20), and the width of the boundary band (RB) provides the light beam, which has the predetermined wavelength, with a difference in optical path length of (N+J)/2 times (N and J are mutually different natural numbers) the predetermined wavelength, as compared with a case of transmission in air.
摘要翻译： 复光物镜，光头装置，光信息装置和信息处理装置，即使当光束源波长从设计值偏移时也能够抑制像差的发生。 在区域（R10）和区域（R20）中形成具有锯齿状或阶梯状横截面的衍射结构。 与在空气中传播的情况相比，在区域（R10）中形成的锯齿状或阶梯状横截面的高度提供具有预定波长的光束，其具有N倍于预定波长的光程长度差 。 与在空气中传播的情况相比，在区域（R20）中形成的锯齿或逐步横截面的高度提供了具有预定波长的光束，其光路长度差为J倍于预定波长 。 设置在区域（R10）和区域（R20）之间的边界带（RB）的两端之间的高度差异和边界带（RB）的宽度中的至少一个高度提供了具有 与空气传播的情况相比，预定波长与（N + J）/ 2倍（N和J相互不同的自然数）的光程长度差异。
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6.发明授权公开(公告)号：US08305864B2
公开(公告)日：2012-11-06
申请号：US13257380
申请日：2011-01-07
IPC分类号： G11B7/00
CPC分类号： G11B7/13922 , G11B7/1353 , G11B7/1374 , G11B7/1376 , G11B7/13925 , G11B2007/0006 , G11B2007/13727
摘要： A compound objective lens, an optical head device, an optical information device, and an information processing device that can inhibit the occurrence of aberration even when a light beam source wavelength shifts from the designed value. A diffraction structure having a sawtooth or stepwise cross section is formed in the region (R10) and region (R20). The height of the sawtooth or stepwise cross section formed in the region (R10) provides a light beam, which has a predetermined wavelength, with a difference in optical path length of N times the predetermined wavelength, as compared with a case of propagation in air. The height of the sawtooth or stepwise cross section formed in the region (R20) provides the light beam, which has the predetermined wavelength, with a difference in optical path length of J times the predetermined wavelength, as compared with a case of propagation in air. At least one of the difference in height between both ends of a boundary band (RB) provided between the region (R10) and the region (R20), and the width of the boundary band (RB) provides the light beam, which has the predetermined wavelength, with a difference in optical path length of (N+J)/2 times (N and J are mutually different natural numbers) the predetermined wavelength, as compared with a case of transmission in air.
摘要翻译： 复光物镜，光头装置，光信息装置和信息处理装置，即使当光束源波长从设计值偏移时也能够抑制像差的发生。 在区域（R10）和区域（R20）中形成具有锯齿状或阶梯状横截面的衍射结构。 与在空气中传播的情况相比，在区域（R10）中形成的锯齿状或阶梯状横截面的高度提供具有预定波长的光束，其具有N倍于预定波长的光程长度差 。 与在空气中传播的情况相比，在区域（R20）中形成的锯齿或逐步横截面的高度提供了具有预定波长的光束，其光路长度差为J倍于预定波长 。 设置在区域（R10）和区域（R20）之间的边界带（RB）的两端之间的高度差异和边界带（RB）的宽度中的至少一个高度提供了具有 与空气传播的情况相比，预定波长与（N + J）/ 2倍（N和J相互不同的自然数）的光程长度差异。
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7.发明申请OPTICAL HEAD, OPTICAL DISC DEVICE, INFORMATION PROCESSING DEVICE, AND OBJECTIVE LENS 审中-公开光学头，光盘设备，信息处理设备和目标镜头公开(公告)号：US20120213052A1
公开(公告)日：2012-08-23
申请号：US13504602
申请日：2010-12-06
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/1374 , G11B7/13922 , G11B2007/0013
摘要： Provided are an optical head capable of favorably recording or reproducing information to or from an information recording medium including a plurality of information recording surfaces, an optical disc device including the optical head, an information processing device including the optical disc, and an objective lens. The optical head (40) includes a blue-violet laser light source (1) which emits a blue-violet laser beam, an objective lens (8) which has an orbicular zone-shaped diffractive structure, and which diffracts the blue-violet laser beam and converges the generated diffracted light of n-th order (where n is a natural number) on a predetermined information recording surface of a multi-layer optical disc (60), and a light-receiving element (23) which receives the blue-violet laser beam reflected by the predetermined information recording surface, wherein the diffractive structure adds a positive power component and a spherical aberration component to the n-th order diffracted light.
摘要翻译： 提供了一种能够向包括多个信息记录表面的信息记录介质或包括该光学头的信息记录介质，包括该光盘的信息处理设备和一个物镜良好地记录或再现信息的光学头。 光头（40）包括发出蓝紫色激光的蓝紫色激光光源（1），具有圆形区域衍射结构的物镜（8），并衍射出蓝紫色激光 并将所产生的n阶衍射光（其中n是自然数）收敛在多层光盘（60）的预定信息记录表面上，并且接收蓝色的光接收元件（23） 紫外激光束，其中，所述衍射结构将正功率分量和球面像差分量添加到所述n级衍射光。
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8.发明授权公开(公告)号：US08483023B2
公开(公告)日：2013-07-09
申请号：US13153713
申请日：2011-06-06
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B7/1353 , G11B7/1378 , G11B2007/0006
摘要： An object of the present invention is to reduce the influence of a stray light incident on a light receiving device by reflection of an unnecessary diffraction light not contributing to write or read on a disc surface at write or read of an optical disc having a large surface reflectivity with respect to an information recording surface. A position in which a diffraction light with an n-order in an advancing path and the n-order in a returning path, reflected on the information recording surface of a first information recording medium, is focused by a condensing lens is different from a position in which a diffraction light different from the n-order diffraction light in at least one of the advancing path and the returning path, reflected on a surface of the first information recording medium, is focused by the condensing lens.
摘要翻译： 本发明的目的是通过在具有大表面的光盘的写入或读取中反射不利于写入或读取在盘表面上的不必要的衍射光来减少入射在光接收装置上的杂光的影响 相对于信息记录面的反射率。 其中在第一信息记录介质的信息记录表面上反射的前进路径中具有n阶的衍射光和返回路径中的n阶的聚焦透镜的位置与位置 其中在第一信息记录介质的表面上反射的行进路径和返回路径中的至少一个中的n级衍射光不同的衍射光被聚光透镜聚焦。
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公开(公告)号：US08391120B2
公开(公告)日：2013-03-05
申请号：US12604758
申请日：2009-10-23
IPC分类号： G11B7/135
CPC分类号： G11B7/1275 , G11B7/1374 , G11B7/13922 , G11B7/13925 , G11B2007/0006 , G11B2007/0013
摘要： An optical head, an optical disc device and an information processing device are capable of suppressing the amount of third-order astigmatism created upon recording or reproducing information on or from a multi-layer optical disc including at least three information recording surfaces. An objective lens satisfies a relationship of tc>(t0+tn)/2 assuming that t0 denotes the thickness of a light transmitting layer from the outer surface of the multi-layer optical disc to an information recording surface having the largest light transmitting layer thickness, tn denotes the thickness of a light transmitting layer from the outer surface of the multi-layer optical disc to an information recording surface having the smallest light transmitting layer thickness and tc denotes the thickness of a virtual light transmitting layer at which the absolute value of a third-order spherical aberration is minimum when blue-violet laser light is incident as parallel light on the objective lens.
摘要翻译： 光头，光盘装置和信息处理装置能够抑制在包括至少三个信息记录表面的多层光盘上记录或再现信息时产生的三阶散光量。 假设t0表示从多层光盘的外表面到具有最大透光层厚度的信息记录表面的透光层的厚度，物镜满足tc>（t0 + tn）/ 2的关系 ，tn表示从多层光盘的外表面到具有最小透光层厚度的信息记录表面的透光层的厚度，tc表示虚拟透光层的厚度，其中绝对值 当蓝紫色激光作为平行光入射到物镜上时，三阶球面像差最小。
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10.发明申请Optical pickup lens device and information recording and reproducing device using the same 有权光学拾取镜头装置及其使用的信息记录和再现装置公开(公告)号：US20060164735A1
公开(公告)日：2006-07-27
申请号：US11385829
申请日：2006-03-22
IPC分类号： G02B9/00
CPC分类号： G11B7/13925 , G11B7/1353 , G11B7/1367 , G11B7/1376
摘要： An optical pickup lens device includes, in the order from the light source side, collimating means for converting a bundle of rays into parallel rays or predetermined convergent or divergent rays, the collimating means being movably held along a direction of an optical axis of a bundle of rays emitted from a light source; an aberration correcting element for allowing a bundle of rays emitted from the collimating means to be transmitted therethrough; and an objective lens element having a numerical aperture of 0.8 or more, and converging a bundle of rays coming from the aberration correcting element onto the information recording medium to form a spot. The aberration correcting element and the objective lens element are integrally held together in a direction orthogonal to the optical axis so as to perform tracking on the information recording medium, and satisfy predetermined conditions.
摘要翻译： 一种光学拾取透镜装置，从光源侧依次包括用于将光束变换为平行光或预定的会聚或发散光线的准直装置，准直装置沿着光束的光轴的方向可移动地保持 从光源发射的光线; 用于允许从准直装置发射的光束穿过其中的像差校正元件; 以及具有0.8以上的数值孔径的物镜元件，并且将来自像差校正元件的光束会聚在信息记录介质上以形成点。 像差校正元件和物镜元件在与光轴正交的方向上一体地保持在一起，以在信息记录介质上执行跟踪，并满足预定条件。
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