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公开(公告)号：US08767518B2
公开(公告)日：2014-07-01
申请号：US13248038
申请日：2011-09-29
IPC分类号： G11B7/12
CPC分类号： G11B7/1353 , G11B7/1367 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An objective lens element that can suppress occurrence of an aberration is disclosed. Sawtooth-like diffraction structures having different height and cycles (pitches) are provided on an inner part R21 and an outer part R22, respectively. A curved surface M211 extending at an intermediate level of recesses and projections of the sawtooth-like diffraction structure provided on the inner part R21, and a curved surface M212 extending at an intermediate level of recesses and projections of the sawtooth-like diffraction structure provided on the outer part R22 are smoothly connected to each other. Even when wavelength of the light source and/or the environmental temperature change, a phase shift does not occur between the inner part R21 and the outer part R22, and a decrease in diffraction efficiency and occurrence of an aberration can be suppressed.
摘要翻译： 公开了能够抑制像差的发生的物镜元件。 分别具有不同高度和周期（间距）的锯齿状衍射结构分别设置在内部部分R21和外部部分R22上。 在内部部件R21上设置的锯齿状衍射结构的凹部和突起的中间水平面延伸的曲面M211，以及设置在上述锯齿状衍射结构的中间水平的锯齿状衍射结构的中间水平面的弯曲面M212 外部部件R22彼此平滑地连接。 即使在光源的波长和/或环境温度发生变化的情况下，内部部件R21和外部部件R22之间也不会发生相位偏移，并且可以抑制衍射效率的降低和像差的发生。
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公开(公告)号：US08472299B2
公开(公告)日：2013-06-25
申请号：US13411636
申请日：2012-03-05
IPC分类号： G11B7/00
CPC分类号： G11B7/139 , G02B3/04 , G02B3/08 , G02B5/1814 , G11B7/1374
摘要： An optical element which has optical steps each providing a phase difference to transmitted light and has low light amount loss and a high efficiency is provided. The optical element includes a symmetry axis, a plurality of optically functional surfaces which are ring-shaped regions around the symmetry axis, and a plurality of wall regions connecting the optically functional surfaces to each other. The optically functional surfaces and the wall regions constitute the optical steps. On a cross-section taken by, as a cutting plane, a plane including the symmetry axis, the contour line of each wall region is substantially parallel to a light beam which is incident on the optically functional surface on the outer side and passes near the wall region. The maximum value of the angle between the symmetry axis and the light beam passing near the wall region is equal to or more than 25 degrees.
摘要翻译： 提供一种光学元件，其具有对透射光提供相位差并具有低光损失和高效率的光学步骤。 光学元件包括对称轴，围绕对称轴的环形区域的多个光学功能表面和将光学功能表面彼此连接的多个壁区域。 光学功能表面和壁区域构成光学步骤。 在通过作为切割平面的包括对称轴的平面截取的横截面上，每个壁区域的轮廓线基本上平行于入射在外侧上的光学功能表面上的光束，并且靠近 墙区域。 对称轴与靠近壁区域的光束之间的角度的最大值等于或大于25度。
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公开(公告)号：US20120163142A1
公开(公告)日：2012-06-28
申请号：US13411655
申请日：2012-03-05
IPC分类号： G11B7/00
CPC分类号： G11B7/13922 , G11B7/1374
摘要： An objective lens element which can obtain appropriate spot performance only by simple position adjustment, and an optical pickup device using the objective lens element are provided. In the objective lens element, an amount of a generated third-order astigmatism of a spot which is formed when symmetry axes of optically functional surfaces are located parallel to the normal line of a base plate and an incident light beam incident such that a central light beam thereof is tilted at 0.5 degree with respect to the normal line of the base plate is converged, is reduced to be less than an amount of a generated spherical aberration of a spot which is formed when the symmetry axes of the optically functional surface are located parallel to the normal line of the base plate and an incident light beam incident parallel to the normal line of the base plate is converged.
摘要翻译： 提供了仅通过简单的位置调整获得适当的光点性能的物镜元件和使用该物镜元件的光学拾取装置。 在物镜元件中，当光学功能表面的对称轴平行于基板的法线和入射光入射时形成的点的产生的三阶散光的量，使得中心光 其相对于基板的法线倾斜0.5度会聚，减小到小于当光学功能表面的对称轴位于时形成的光斑的产生的球面像差的量 平行于基板的法线的入射光束和平行于基板的法线的入射光束会聚。
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14.发明申请DIFFRACTIVE OPTICAL ELEMENT, OBJECTIVE OPTICAL SYSTEM INCLUDING THE SAME, AND OPTICAL PICKUP INCLUDING THE SAME 有权衍射光学元件，包括它们的目标光学系统和包括其中的光学拾取公开(公告)号：US20110032811A1
公开(公告)日：2011-02-10
申请号：US12854537
申请日：2010-08-11
CPC分类号： G02B5/1814 , G02B27/4238 , G02B27/4294 , G11B7/1353 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： A diffractive optical element includes a first optical part and a second optical part bonded to each other with a bonded surface therebetween configured as a diffraction surface. In this diffractive optical element, the diffraction order of diffracted light with the largest quantity of light out of diffracted light for one of a plurality of kinds of laser beams obtained on the diffraction surface is different from the diffraction order for at least another laser beam.
摘要翻译： 衍射光学元件包括第一光学部件和第二光学部件，所述第一光学部件和第二光学部件彼此接合，其间的接合表面被构造为衍射表面。 在该衍射光学元件中，衍射面上得到的多种激光中的一种的衍射光的衍射光的衍射级别与至少另一种激光束的衍射级别不同。
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公开(公告)号：US07548383B2
公开(公告)日：2009-06-16
申请号：US11808930
申请日：2007-06-13
CPC分类号： G11B7/1376 , G11B7/13925 , G11B2007/0013
摘要： An optical pickup 1 includes a collimator lens 13 for changing the shape of a laser light by moving on the optical axis AX from a base point. An objective lens 15 is set so as to form a spot of which size, when the collimator lens 13 is located at the base point, is minimum at a point apart from the light source side surface of an information recording medium 20 by a distance of Lc defined by an expression (1): Lc=(L0+Ln)/2 (1), wherein Lc is named as a thickness to the designed center; L0 is a distance between the light source side surface of the information recoding medium and an information recording face located nearest to the light source side surface; and Ln is a distance between the light source side surface of the information recording medium and an information recording face located farthest from the light source side surface.
摘要翻译： 光拾取器1包括准直透镜13，用于通过从基点在光轴AX上移动来改变激光的形状。 物镜15被设定为当准直透镜13位于基点时形成大小的点，在与信息记录介质20的光源侧表面分开的距离处最小 Lc =（L0 + Ln）/ 2（1），<？in-line-formula description =“In-line-formula” 公式描述=“在线公式”end =“tail”？>其中Lc被命名为设计中心的厚度; L0是信息记录介质的光源侧表面与最靠近光源侧表面的信息记录面之间的距离; Ln是信息记录介质的光源侧表面与距光源侧表面最远的信息记录面之间的距离。
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公开(公告)号：US20090022039A1
公开(公告)日：2009-01-22
申请号：US11631953
申请日：2006-02-17
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G02B3/04 , G02B3/08 , G02B27/144 , G02B27/145 , G11B7/1353 , G11B7/1369 , G11B7/1378 , G11B7/13922 , G11B7/13925 , G11B2007/0006
摘要： An optical pickup (1) includes a light source (6) capable of emitting laser beams of various wavelengths and an objective optical system (2). The objective optical system (2) includes at least two wavefront conversion surfaces (13a) and (16a) and an objective lens (10). The at least two wavefront conversion surfaces (13a) and (16a) convert a wavefront of any laser beam entered therein into a different wavefront in response to the kind of an optical information recording medium (3) corresponding to the laser light. The objective lens (10) focuses the laser beam came out of the wavefront conversion surface (16a) on an optical information recording surface (3R). The optical pickup (1) satisfies the following condition for every wavelength of the corresponding laser beams: |SCMAX|
摘要翻译： 光拾取器（1）包括能够发射各种波长的激光束的光源（6）和物镜光学系统（2）。 物镜光学系统（2）包括至少两个波前转换表面（13a）和（16a）和物镜（10）。 响应于对应于激光的光学信息记录介质（3）的种类，至少两个波前转换表面（13a）和（16a）将其中输入的任何激光束的波前转换成不同的波阵面。 物镜（10）将激光束聚焦在光学信息记录表面（3R）上的波前转换表面（16a）之外。 对于相应激光束的每个波长，光学拾取器（1）满足以下条件：<？in-line-formula description =“In-line Formulas”end =“lead”？> | SCMAX | <0.036（1） ？in-line-formula description =“In-line Formulas”end =“tail”？>其中SCMAX是针对物镜光学系统（2）的正弦条件的违规的最大值。
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公开(公告)号：US20080130467A1
公开(公告)日：2008-06-05
申请号：US11819204
申请日：2007-06-26
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B7/1275 , G11B7/1353 , G11B2007/0006 , G11B2007/13722
摘要： An objective optical system 10 includes a diffraction plane 15 for separating a laser light beam into at least 0th-order diffracted light and 1st-order diffracted light. The objective optical system 10 is configured to focus the 0th-order diffracted light onto an information recording surface 22a of a first information recording medium 20a and the 1st-order diffracted light onto an information recording surface 22b of a second information recording medium 20b and meet the following conditional expression (1): η0>η1 (1) wherein η0 is the diffraction efficiency of the 0th-order diffracted light and η1 is the diffraction efficiency of the 1st-order diffracted light.
摘要翻译： 物镜光学系统10包括用于将激光束分离成至少0级次级衍射光和1级次级衍射光的衍射平面15。 物镜光学系统10被配置为将第0个/次级衍射光聚焦到第一信息记录介质20a的信息记录表面22a上，并且第一信号记录介质 将衍射光分级到第二信息记录介质20b的信息记录表面22b上，并满足以下条件表达式（1）：<？in-line-formula description =“In-line Formulas”end =“lead”？> η（1）<βin-line-formula description =“In-line Formulas”end =“tail”？>其中eta <0> 是第0级衍射光的衍射效率，而第1级衍射光的衍射效率是第1级次衍射光的衍射效率 衍射光。
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18.发明授权公开(公告)号：US07221521B2
公开(公告)日：2007-05-22
申请号：US11385829
申请日：2006-03-22
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, a collimating lens for converting a bundle of rays into parallel rays or predetermined convergent or divergent rays, the collimating lens 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 lens 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.
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19.发明申请公开(公告)号：US20060164734A1
公开(公告)日：2006-07-27
申请号：US11385765
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.
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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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