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公开(公告)号：US07839752B2
公开(公告)日：2010-11-23
申请号：US11536004
申请日：2006-09-28
IPC分类号： G11B7/135
CPC分类号： G11B7/1374 , G11B7/1275 , G11B7/13922 , G11B2007/0006
摘要： There is provided an optical disc drive for recordation/reproduction for three types of optical discs by selectively using one of three types of light beams. The optical disc drive comprises an objective lens. The objective lens has a step structure which gives an optical path length difference to an incident beam at each step. When the third laser beam passes through the objective lens, the objective lens produces normal diffraction order light converging to a recording surface of the third optical disc and undesired diffraction order light converging to a point deviating from the recording surface of the third optical disc. A distance from a point to which the normal diffraction order light converges to a point to which the undesired diffraction order light converges is larger than or equal to twice a pull-in range of a focus error signal obtained when the third optical disc is used.
摘要翻译： 通过选择性地使用三种类型的光束之一，提供了用于三种类型的光盘的记录/再现的光盘驱动器。 光盘驱动器包括物镜。 物镜具有在每个步骤中给入射光束的光程长度差的阶梯结构。 当第三激光束通过物镜时，物镜产生会聚到第三光盘的记录表面的正常衍射级光，并且不期望的衍射级光会聚到偏离第三光盘的记录表面的点。 从法线衍射级光收敛到不期望的衍射级光会聚的点的距离大于或等于当使用第三光盘时获得的聚焦误差信号的拉入范围的两倍。
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公开(公告)号：US20070014211A1
公开(公告)日：2007-01-18
申请号：US11456943
申请日：2006-07-12
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B2007/0006
摘要： There is provided an objective lens used for three types of optical discs including by selectively using one of three types of light beams. At least one of surfaces of the objective lens is provided with a first region converging the third light beam on a recoding surface of the third optical disc. The first region has a step structure configured to have concentric refractive surface zones and to give an optical path length difference to an incident beam at each step formed between adjacent refractive surface zones. The step structure is configured such that the optical path length difference given by each step is substantially equal to an odd multiple of a wavelength of a first light beam, and a value of differentiation of an optical path difference function defining the step structure crosses zero in a height ranging from 30% to 70% of an effective diameter of the first region.
摘要翻译： 提供了一种用于三种类型的光盘的物镜，包括通过选择性地使用三种类型的光束之一。 物镜的至少一个表面设置有将第三光束会聚在第三光盘的记录表面上的第一区域。 第一区域具有构造成具有同心折射表面区域并且在相邻折射表面区域之间形成的每个台阶处的入射光束的光程长度差异的台阶结构。 台阶结构被配置为使得由每个步骤给出的光程长度差基本上等于第一光束的波长的奇数倍，并且限定步骤结构的光程差函数的微分值在零 高度为第一区域的有效直径的30％至70％。
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公开(公告)号：US20050073937A1
公开(公告)日：2005-04-07
申请号：US10956132
申请日：2004-10-04
CPC分类号： G11B7/1392 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： An objective lens used for recording data to and/or reproducing data from a plurality of types of optical discs having different thicknesses of cover layers. The objective lens satisfies a condition 0.02
摘要翻译： 用于从具有不同厚度的覆盖层的多种类型的光盘记录数据和/或再现数据的物镜。 物镜满足条件0.02
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公开(公告)号：US08072694B2
公开(公告)日：2011-12-06
申请号：US12046751
申请日：2008-03-12
IPC分类号： G02B3/08
CPC分类号： G11B7/1353 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： There is provided an objective lens used for a plurality of types of optical discs having a front surface and a rear surface, each of which includes an inner region and an outer region. The outer region has a surface shape which suppresses a coma caused when a beam used for a first optical disc is incident thereon obliquely with respect to an optical axis of the objective lens. The inner region is configured such that, at a boundary position between the inner region and the outer region, the coma caused when a beam used for a second optical disc is incident on the inner region obliquely at a first angle with respect to the optical axis is less than the coma caused when the beam used for the second optical disc is incident on the outer region obliquely at the first angle with respect to the optical axis. Further, an inclination θ2A of the inner region and an inclination θ2B of the outer region of the rear surface satisfy a condition: −2.5
摘要翻译： 提供了一种用于具有前表面和后表面的多种类型的光盘的物镜，每个光盘包括内部区域和外部区域。 外部区域具有抑制当用于第一光盘的光束相对于物镜的光轴倾斜入射时引起的彗差的表面形状。 内部区域被构造成使得在内部区域和外部区域之间的边界位置处，当用于第二光盘的光束相对于光轴以第一角度倾斜地入射到内部区域时引起的彗形像 小于当用于第二光盘的光束相对于光轴以第一角度倾斜地入射到外部区域时引起的昏迷。 此外，内表面的倾斜度和外面的面积和外表面的外表面部分2B的条件是满足以下条件：-2.5 <＆amp; t; 2B-＆thetas; 2A <0.0。 。 。 （1）。
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公开(公告)号：US07742370B2
公开(公告)日：2010-06-22
申请号：US11419810
申请日：2006-05-23
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G02B5/1876 , G02B5/1895 , G11B7/1367 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An objective lens, for an optical information read/write device that performs read/write operations on each of a plurality of optical discs using a corresponding one of three laser beams having first, second, and third wavelengths λ1, λ2, and λ3 (nm) satisfying a relationship λ1
摘要翻译： 一种用于光信息读/写装置的物镜，用于使用具有第一，第二和第三波长λ1，λ2和λ3（nm）的三个激光束中的相应一个对多个光盘中的每一个进行读/写操作 ）分别包括具有多个环形折射表面区域的相移结构，物镜的至少一个表面被同心分开。 物镜由符合条件40＆nlE;＆ngr; d＆nlE; 80的阿贝数和材料制成。 相移结构在每对相邻的折射表面区域之间具有步骤，其给出与入射激光束的光程差，从而满足条件2N + 1.00 <| | Dgr; OPD /λ1| <2N + 1.30， 其中＆Dgr; OPD表示步长给出具有第一波长的激光束的光程差（nm），N表示非负整数。
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公开(公告)号：US20060181978A1
公开(公告)日：2006-08-17
申请号：US11352324
申请日：2006-02-13
IPC分类号： G11B7/00
CPC分类号： G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： A optical system of an optical pick-up is provided. The optical system includes an optical element including at least a phase shift surface among the surfaces thereof, and located closer to a light source than the objective lens. In this configuration, t1≦t2 is satisfied, where t1 represents a thickness of a cover layer of a first optical disc for which a first laser beam is employed, and t2 a thickness of a cover layer of a second optical disc for which a second laser beam, having a longer wavelength than the first laser beam, is employed. NA1≧NA2 is satisfied, where NA1 represents a numerical aperture for the first optical disc, and NA 2 the numerical aperture for the second optical disc. The phase shift surface includes a first region that converges the first laser beam on a recording surface of the first optical disc, and the second laser beam on a recording surface of the second optical disc. The first region includes at least an annular zone structure having an annular zone group including a step that gives an additional optical path length to the first laser beam generally by two wavelengths, with respect to an inner refracting surface at a boundary between adjacent refracting surfaces, and a return step portion located at an outer position of the annular zone group. The return step includes a step that gives an additional optical path length to the first laser beam generally by three wavelengths with respect to an inner refracting surface located inside of the return step, in an opposite direction to the step of the annular zone group.
摘要翻译： 提供光学拾取器的光学系统。 光学系统包括在其表面中至少包括相移表面并且位于比物镜更靠近光源的光学元件。 在这种配置中，满足t 1 <= t 2，其中t 1表示使用第一激光束的第一光盘的覆盖层的厚度，t 2表示第二光学器件的覆盖层的厚度 使用具有比第一激光束长的波长的第二激光束的光盘。 NA 1> = NA 2，其中NA 1表示第一光盘的数值孔径，NA 2表示第二光盘的数值孔径。 相移表面包括将第一激光束会聚在第一光盘的记录表面上的第一区域和在第二光盘的记录表面上的第二激光束。 第一区域至少包括具有环形区域组的环形区域结构，所述环形区域组包括相对于相邻折射表面之间的边界处的内部折射表面给予第一激光束的附加光程长度通常为两个波长的步骤， 以及位于所述环形区域组的外部位置的返回台阶部。 返回步骤包括以与环形区域组的台阶相反的方向相对于位于返回步骤内部的内部折射表面通常相对于第一激光束附加光路长度的步骤。
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公开(公告)号：US06900949B2
公开(公告)日：2005-05-31
申请号：US10761318
申请日：2004-01-22
CPC分类号： G11B7/1353 , G11B7/1374 , G11B7/1378 , G11B7/13922 , G11B2007/0006
摘要： An optical system of an optical pick-up for a plurality of types of optical discs with a corresponding plurality of light sources. A first coupling lens that is used at least for the first optical disc, and an objective lens that is used for the plurality of types of optical discs. A beam for the first optical disc emitted by the plurality of light sources passes through the first coupling lens and is incident on the objective lens as a diverging beam. The diverging beam being given spherical aberration by the coupling lens. When the objective lens shift occurs, a coma component relating to the spherical aberration of the diverging beam which is shifted with respect to the objective lens due to the shift of the objective lens is canceled by a coma generated by the objective lens and the cover layer of the first optical disc.
摘要翻译： 一种用于具有相应多个光源的多种类型的光盘的光学拾取器的光学系统。 至少用于第一光盘的第一耦合透镜和用于多种类型的光盘的物镜。 用于由多个光源发射的第一光盘的光束穿过第一耦合透镜并作为发散光束入射在物镜上。 发散光束由耦合透镜给出球面像差。 当发生物镜偏移时，由于物镜的偏移而相对于物镜偏移的发散光束的球面像差的彗差成分被物镜和覆盖层产生的彗形消除 的第一光盘。
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公开(公告)号：US07839751B2
公开(公告)日：2010-11-23
申请号：US11352324
申请日：2006-02-13
CPC分类号： G11B7/1367 , G11B7/13922 , G11B2007/0006
摘要： An optical system of an optical pick-up is provided. The optical system includes an optical element including at least a phase shift surface among the surfaces thereof, and located closer to a light source than the objective lens. In this configuration, t1≦t2 is satisfied, where t1 represents a thickness of a cover layer of a first optical disc for which a first laser beam is employed, and t2 a thickness of a cover layer of a second optical disc for which a second laser beam, having a longer wavelength than the first laser beam, is employed. NA1≧NA2 is satisfied, where NA1 represents a numerical aperture for the first optical disc, and NA2 the numerical aperture for the second optical disc. The phase shift surface includes a first region that converges the first laser beam on a recording surface of the first optical disc, and the second laser beam on a recording surface of the second optical disc. The first region includes at least an annular zone structure having an annular zone group including a step that gives an additional optical path length to the first laser beam generally by two wavelengths, with respect to an inner refracting surface at a boundary between adjacent refracting surfaces, and a return step portion located at an outer position of the annular zone group.
摘要翻译： 提供光学拾取器的光学系统。 光学系统包括在其表面中至少包括相移表面并且位于比物镜更靠近光源的光学元件。 在该结构中，满足t1＆nlE; t2，其中t1表示采用第一激光束的第一光盘的覆盖层的厚度，t2表示第二光盘的覆盖层的厚度， 使用具有比第一激光束长的波长的激光束。 NA1≥NA2，其中NA1表示第一光盘的数值孔径，NA2表示第二光盘的数值孔径。 相移表面包括将第一激光束会聚在第一光盘的记录表面上的第一区域和在第二光盘的记录表面上的第二激光束。 第一区域至少包括具有环形区域组的环形区域结构，所述环形区域组包括相对于相邻折射表面之间的边界处的内部折射表面给予第一激光束的附加光程长度通常为两个波长的步骤， 以及位于所述环形区域组的外部位置的返回台阶部。
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公开(公告)号：US07738345B2
公开(公告)日：2010-06-15
申请号：US11456943
申请日：2006-07-12
IPC分类号： G11B7/00
CPC分类号： G11B7/1374 , G11B2007/0006
摘要： There is provided an objective lens used for three types of optical discs including by selectively using one of three types of light beams. At least one of surfaces of the objective lens is provided with a first region converging the third light beam on a recoding surface of the third optical disc. The first region has a step structure configured to have concentric refractive surface zones and to give an optical path length difference to an incident beam at each step formed between adjacent refractive surface zones. The step structure is configured such that the optical path length difference given by each step is substantially equal to an odd multiple of a wavelength of a first light beam, and a value of differentiation of an optical path difference function defining the step structure crosses zero in a height ranging from 30% to 70% of an effective diameter of the first region.
摘要翻译： 提供了一种用于三种类型的光盘的物镜，包括通过选择性地使用三种类型的光束之一。 物镜的至少一个表面设置有将第三光束会聚在第三光盘的记录表面上的第一区域。 第一区域具有构造成具有同心折射表面区域并且在相邻折射表面区域之间形成的每个台阶处的入射光束的光程长度差异的台阶结构。 台阶结构被配置为使得由每个步骤给出的光程长度差基本上等于第一光束的波长的奇数倍，并且限定步骤结构的光程差函数的微分值在零 高度为第一区域的有效直径的30％至70％。
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公开(公告)号：US07433291B2
公开(公告)日：2008-10-07
申请号：US10956132
申请日：2004-10-04
IPC分类号： G11B7/00
CPC分类号： G11B7/1392 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： An objective lens used for recording data to and/or reproducing data from a plurality of types of optical discs having different thicknesses of cover layers. The objective lens satisfies a condition 0.02
摘要翻译： 用于从具有不同厚度的覆盖层的多种类型的光盘记录数据和/或再现数据的物镜。 物镜满足条件0.02
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