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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：US20060114796A1
公开(公告)日：2006-06-01
申请号：US11289386
申请日：2005-11-30
IPC分类号： G11B7/00
CPC分类号： G11B7/1367 , G02B27/42 , G02B27/4238 , G02B27/4294 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： A method of designing an optical element to be used for an optical system in which each of a plurality of light beams having different design wavelengths passes through the optical element is provided. The method includes determining at least two types of optical path difference functions including first and second optical path difference functions in such a manner that proportion, brought by the first optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized is different from proportion, brought by the second optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized, and obtaining a shape defined by combining the at least two types of optical path difference functions so as to apply the obtained shape to at least one surface of surfaces of the optical element.
摘要翻译： 提供一种设计用于光学系统的光学元件的方法，其中具有不同设计波长的多个光束中的每一个通过光学元件。 该方法包括确定包括第一和第二光程差函数的至少两种类型的光程差函数，使得由第一光程差函数带来的比例在衍射级之间，衍射级之间的多个光束的衍射效率 最大化不同于由第二光程差函数引起的比例，在多个光束的衍射效率最大化的衍射级之间，并且获得通过组合至少两种类型的光程差函数而定义的形状 以将获得的形状应用于光学元件的表面的至少一个表面。
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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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25.发明申请Complex lens for a tandem scanning optical system and a manufacturing method thereof 失效串联扫描光学系统用复合透镜及其制造方法公开(公告)号：US20050024723A1
公开(公告)日：2005-02-03
申请号：US10923668
申请日：2004-08-24
申请人： Daisuke Koreeda , Junji Kamikubo
发明人： Daisuke Koreeda , Junji Kamikubo
CPC分类号： G02B3/0025 , G02B3/0031 , G02B3/005 , G02B3/0068 , G02B3/0075 , G02B26/123 , Y10S425/808
摘要： A complex lens for a tandem scanning optical system converges a plurality of light beams, which are modulated independently and deflected by a deflector, onto a surface to be scanned, and forms a plurality of scanning lines at the same time. The complex lens includes a plurality of stacked lens portions that are molded as a single-piece element. Thus a plurality of lens surfaces of the lens portions at an incident side are formed by a single-piece mirror surface core and a plurality of lens surfaces of the lens portions at an exit side are formed by another single-piece mirror surface core during the molding process.
摘要翻译： 用于串联扫描光学系统的复合透镜将由偏转器独立调制和偏转的多个光束会聚到待扫描的表面上，并且同时形成多条扫描线。 复合透镜包括多个被模制成单片元件的堆叠透镜部分。 因此，入射侧的透镜部分的多个透镜表面由单片镜面芯形成，并且在出射侧的透镜部分的多个透镜表面由另一个单片镜面芯形成 成型工艺。
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公开(公告)号：US06822800B2
公开(公告)日：2004-11-23
申请号：US10456674
申请日：2003-06-09
申请人： Daisuke Koreeda , Koichi Maruyama
发明人： Daisuke Koreeda , Koichi Maruyama
IPC分类号： G02B2700
CPC分类号： G11B7/1374 , G02B3/08 , G02B7/028 , G11B7/13922
摘要： An objective lens for an optical pickup has a single lens element. One surface of the objective lens is divided into a central area and a peripheral area, and a step providing a level difference along a direction of the optical axis is formed at a boundary therebetween. The step provides a phase shift between light passing through the central area and the peripheral area. The level difference is formed such that a thickness on the peripheral area side is greater than a thickness on the central area side at the boundary. In one case, the objective lens satisfies a condition: 0.83
摘要翻译： 用于光学拾取器的物镜具有单个透镜元件。 物镜的一个表面被分成中心区域和周边区域，并且在它们之间的边界处形成沿着光轴方向提供水平差的台阶。 该步骤提供穿过中心区域的光和外围区域之间的相移。 水平差形成为周边区域侧的厚度大于边界处的中央区域侧的厚度。 在一种情况下，物镜满足条件：其中hx是边界的半径，hmax是限定由台阶形成的表面的数值孔径的有效半径。
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公开(公告)号：US06734890B2
公开(公告)日：2004-05-11
申请号：US10173769
申请日：2002-06-19
申请人： Shuichi Takeuchi , Daisuke Koreeda
发明人： Shuichi Takeuchi , Daisuke Koreeda
IPC分类号： G02B2608
CPC分类号： B41J2/473 , G02B26/123
摘要： A scanning optical system that emits a plurality of beams to a plurality of surfaces to be scanned, respectively. The scanning optical system includes a light source and a polygonal mirror. The plurality of beams incident on the polygonal mirror are inclined with respect each other in an auxiliary scanning direction. The scanning optical system further includes an imaging optical system that converges the deflected beams on the plurality of surfaces, respectively. The imaging optical system includes a front lens group and a plurality of rear lens groups. All the beams are incident on the front lens group, and then incident on the respective rear lens groups. Each of the plurality of rear lens groups has a shape which is designed in accordance with an angle of a beam incident thereon with respect to an optical axis of the front lens group.
摘要翻译： 一种扫描光学系统，其分别将多个光束发射到要被扫描的多个表面。 扫描光学系统包括光源和多面镜。 入射在多面镜上的多个光束在辅助扫描方向上相对倾斜。 扫描光学系统还包括成像光学系统，其将偏转的光束分别会聚在多个表面上。 成像光学系统包括前透镜组和多个后透镜组。 所有的光束入射在前透镜组上，然后入射到各个后透镜组上。 多个后透镜组中的每一个具有根据相对于前透镜组的光轴入射的光束的角度而设计的形状。
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公开(公告)号：US06667821B2
公开(公告)日：2003-12-23
申请号：US10054857
申请日：2002-01-25
申请人： Daisuke Koreeda
发明人： Daisuke Koreeda
IPC分类号： G02B2608
CPC分类号： G02B27/4211 , G02B13/0005 , G02B26/125 , G02B27/0031 , G02B27/0037 , G02B27/4227
摘要： A scanning lens which converges a beam deflected by a deflector on a surface to be scanned, is provided with at least one refractive lens, and a diffractive lens structure formed on at least one surface of the at least one refractive lens. The scanning lens is configured to satisfy the following condition: 9.0
摘要翻译： 将由偏转器偏转的光束会聚在待扫描的表面上的扫描透镜设置有至少一个折射透镜和形成在至少一个折射透镜的至少一个表面上的衍射透镜结构。 扫描透镜被配置为满足以下条件：其中fd是至少一个衍射透镜结构的焦距，f是整个包括至少一个衍射透镜结构的至少一个衍射透镜结构的扫描透镜的焦距，并且至少 一个折射透镜。 此外，扫描透镜被配置为使得对于与第一波长不同的第一波长和第二波长二者来补偿横向色差。
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29.发明授权公开(公告)号：US08705331B2
公开(公告)日：2014-04-22
申请号：US13311671
申请日：2011-12-06
IPC分类号： G11B7/135
CPC分类号： G11B7/1367 , G02B27/42 , G02B27/4238 , G02B27/4294 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： A method of designing an optical element to be used for an optical system in which each of a plurality of light beams having different design wavelengths passes through the optical element is provided. The method includes determining at least two types of optical path difference functions including first and second optical path difference functions in such a manner that proportion, brought by the first optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized is different from proportion, brought by the second optical path difference function, between diffraction orders at which diffraction efficiencies of the plurality of light beams are maximized, and obtaining a shape defined by combining the at least two types of optical path difference functions so as to apply the obtained shape to at least one surface of surfaces of the optical element.
摘要翻译： 提供一种设计用于光学系统的光学元件的方法，其中具有不同设计波长的多个光束中的每一个通过光学元件。 该方法包括确定包括第一和第二光程差函数的至少两种类型的光程差函数，使得由第一光程差函数带来的比例在衍射级之间，衍射级之间的多个光束的衍射效率 最大化不同于由第二光程差函数引起的比例，在多个光束的衍射效率最大化的衍射级之间，并且获得通过组合至少两种类型的光程差函数而定义的形状 以将获得的形状施加到光学元件的表面的至少一个表面。
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30.发明申请公开(公告)号：US20110122758A1
公开(公告)日：2011-05-26
申请号：US12949023
申请日：2010-11-18
申请人： Daisuke Koreeda , Shuichi Takeuchi
发明人： Daisuke Koreeda , Shuichi Takeuchi
IPC分类号： G11B7/24
CPC分类号： G11B7/13922 , G02B5/1895 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： An objective optical system for an optical information recording/reproducing apparatus for recording/reproducing for first, second and third optical discs by selectively using three types of substantially collimated light beams including first, second and third light beams respectively having first, second and third wavelengths, wherein at least one of optical surfaces of the objective optical system comprises a diffraction surface having a diffraction structure, the diffraction surface includes a first region defined by first and second optical path difference functions, a second region defined by at least one type of optical path difference function, and a third region defined by at least one type of optical path difference function, the first region satisfies a condition: −0.15
摘要翻译： 一种用于光信息记录/再现装置的物镜光学系统，用于通过选择性地使用分别具有第一，第二和第三波长的第一，第二和第三光束的三种基本上准直的光束来记录/再现第一，第二和第三光盘 其中所述物镜光学系统的至少一个光学表面包括具有衍射结构的衍射表面，所述衍射表面包括由第一和第二光程差函数限定的第一区域，由至少一种类型的光学 路径差分函数和由至少一种类型的光程差函数定义的第三区域，第一区域满足条件：-0.15
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