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    Scanning optical system
    81.
    发明授权
    Scanning optical system 有权
    扫描光学系统

    公开(公告)号：US07193759B2

    公开(公告)日：2007-03-20

    申请号：US10623692

    申请日：2003-07-22

    Applicant: Shuichi Takeuchi ,  Yutaka Takakubo

    Inventor： Shuichi Takeuchi ,  Yutaka Takakubo

    IPC: G02B26/08

    CPC classification number: G02B26/125

    Abstract: There is provided a scanning optical system, which is provided with a light source that emits at least one beam, a polygonal mirror, and an imaging optical system that converges the at least one beam deflected by the polygonal mirror to form at least one beam spot on a surface to be scanned. The at least one beam incident on the polygonal mirror is inclined in an auxiliary scanning direction which is perpendicular to the main scanning direction. Further, at least one lens surface of the imaging optical system is configured such that a beam reflected therefrom proceeds toward an outside region of the polygonal mirror.

    Abstract translation: 提供了一种扫描光学系统，其设置有发射至少一个光束的光源，多面镜和成像光学系统，其收敛由多面镜偏转的至少一个光束以形成至少一个光束点 在要扫描的表面上。 入射在多面镜上的至少一个光束在垂直于主扫描方向的辅助扫描方向上倾斜。 此外，成像光学系统的至少一个透镜表面被配置为使得从其反射的光束朝向多面镜的外部区域。

    Objective lens for optical disc
    84.
    发明申请
    Objective lens for optical disc 失效
    光学镜片

    公开(公告)号：US20050152259A1

    公开(公告)日：2005-07-14

    申请号：US11033741

    申请日：2005-01-13

    Applicant: Shuichi Takeuchi ,  Koichi Maruyama ,  Daisuke Koreeda

    Inventor： Shuichi Takeuchi ,  Koichi Maruyama ,  Daisuke Koreeda

    IPC: G02B13/00 ,  G02B3/08 ,  G02B13/18 ,  G11B7/00 ,  G11B7/135

    CPC classification number: G11B7/1374 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

    Abstract: An objective lens for recording data to and/or reproducing data from first and second optical discs. The objective lens is provided with at least one surface including a plurality of annular zones divided by steps. The steps has functions of phase shifting a wavefront of light passing through the plurality of annular zones so that a beam spot formed at a converging point of an average wavefront of the wavefront phase shifted by the steps is used for the first and second optical discs. The plurality of annular zones of the at least one surface includes at least one annular zone structure which includes first and second annular zone groups, each of which has at least three steps for phase shifting the wavefront in a first direction, and a first return step which is a step formed at a boundary between the first and second annular zone groups. The first return step phase shifts the wavefront in a second direction opposite to the first direction. An absolute value |Δψ1| of a phase shifting amount of the first light beam given by the first return step satisfies a condition: 6π

    Abstract translation: 用于将数据记录到第一和第二光盘和/或从第一和第二光盘再现数据的物镜。 物镜设置有至少一个表面，其包括被台阶分割的多个环形区域。 这些步骤具有使通过多个环形区域的光的波前相移的功能，使得在第一和第二光盘处使用由步骤偏移的波前相位的平均波前的聚光点处形成的束斑。 所述至少一个表面的多个环形区域包括至少一个环形区域结构，其包括第一和第二环形区域组，每个环形区域组具有至少三个步骤，用于沿第一方向相移所述波阵面;以及第一返回步骤 其是在第一和第二环形区域组之间的边界处形成的台阶。 第一返回阶段相对于与第一方向相反的第二方向偏移波前。 绝对值| Deltapsi1 | 由第一返回步骤给出的第一光束的相移量满足条件：6pi <| Deltapsi1 | <14pi。 。 。 （1）。 绝对值| Deltapsi1 | 由第一返回步骤给出的第一光束的相移量的值小于由第一环形区域组给出的相移量之和的绝对值和相移量之和的绝对值中的较大值 由第二个环形区组给出。

    Objective lens
    86.
    发明申请
    Objective lens 有权
    物镜

    公开(公告)号：US20050057811A1

    公开(公告)日：2005-03-17

    申请号：US10937290

    申请日：2004-09-10

    Applicant: Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi ,  Naohito Sasaki

    Inventor： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi ,  Naohito Sasaki

    IPC: G02B1/11 ,  G02B13/18 ,  G11B7/135 ,  G11B7/00 ,  G02B1/10 ,  G02B21/02

    CPC classification number: G11B7/1374 ,  G02B1/11 ,  G02B13/18

    Abstract: An objective lens on which a beam having parallel light fluxes is incident includes a single element lens and a reflection suppressing coating formed on at least one surface of the single element lens. The reflection suppressing coating is formed such that the reflectivity across a radius of the objective lens exhibits a local maximal value, and the reflection suppressing coating is formed to achieve the following condition: 0.6

    Abstract translation: 入射了具有平行光束的光束的物镜包括形成在单一元件透镜的至少一个表面上的单个元件透镜和反射抑制涂层。 形成反射抑制涂层，使得物镜半径的反射率呈现局部最大值，形成反射抑制涂层以达到以下条件：0.6

    Objective lens
    87.
    发明申请
    Objective lens 有权
    物镜

    公开(公告)号：US20050041561A1

    公开(公告)日：2005-02-24

    申请号：US10900250

    申请日：2004-07-28

    Applicant: Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

    Inventor： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

    IPC: G11B7/00 ,  G11B7/135

    CPC classification number: G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

    Abstract: 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

    Abstract translation: 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，内部区域的倾斜度θ2A和后表面的外部区域的倾斜度θ2B满足条件：-2.5

    Objective lens having diffractive structure for optical pick-up
    88.
    发明授权
    Objective lens having diffractive structure for optical pick-up 失效
    物镜具有用于光学拾取的衍射结构

    公开(公告)号：US06807019B2

    公开(公告)日：2004-10-19

    申请号：US10107133

    申请日：2002-03-28

    Applicant: Shuichi Takeuchi ,  Koichi Maruyama

    Inventor： Shuichi Takeuchi ,  Koichi Maruyama

    IPC: G02B308

    CPC classification number: G11B7/13922 ,  G02B5/1895 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

    Abstract: Disclosed is an objective lens of an optical pick-up that converges light beams of two different wavelengths onto recording layers of optical discs of two different standards, respectively. The objective lens includes a refractive lens having a positive power and a diffractive lens structure formed on one surface of the refractive lens. The diffractive lens structure has a plurality of concentric ring areas with minute steps at the boundaries therebetween. The diffractive lens structure maximizes the diffraction efficiency of the third order diffracted light at the shorter wavelength and maximizes the diffraction efficiency of the second order diffracted light at the longer wavelength. This enables the diffractive lens structure to correct the chromatic aberration at the respective wavelengths with keeping high diffraction efficiency.

    Abstract translation: 公开了将两种不同波长的光束分别聚焦到两种不同标准的光盘的记录层上的光学拾取器的物镜。 物镜包括具有正功率的折射透镜和形成在折射透镜的一个表面上的衍射透镜结构。 衍射透镜结构具有在它们之间的边界处具有微小阶梯的多个同心圆环区域。 衍射透镜结构使得在较短波长处的三次衍射光的衍射效率最大化，并且使较长波长的二次衍射光的衍射效率最大化。 这使得衍射透镜结构能够以高衍射效率来校正各波长处的色像差。

    Objective lens for optical pick-up
    89.
    发明授权
    Objective lens for optical pick-up 有权
    物镜用于光学拾取

    公开(公告)号：US06624942B2

    公开(公告)日：2003-09-23

    申请号：US10166680

    申请日：2002-06-12

    Applicant: Koichi Maruyama ,  Shuichi Takeuchi

    Inventor： Koichi Maruyama ,  Shuichi Takeuchi

    IPC: G02B2744

    CPC classification number: G02B5/1876

    Abstract: An objective lens for an optical pick-up has a refractive lens element provided with a diffraction lens structure on at least one surface thereof. The diffraction lens structure has a plurality of annular zones. The objective lens is capable of converging at least two beams having different wavelengths on at least two types of optical discs having different data recording densities, respectively. The objective lens is partitioned into a common area through which a beam with a low NA passes, and an exclusive high NA area which is designed to converge a beam with a high NA. The boundaries of the annular zones formed on the exclusive high NA area are designed independently from boundaries obtained from an optical path difference function so that the beam with the high NA is converged substantially on a certain point and the beam with the low NA is diffused.

    Abstract translation: 用于光学拾取器的物镜具有在其至少一个表面上设置有衍射透镜结构的折射透镜元件。 衍射透镜结构具有多个环形区域。 物镜能够在具有不同数据记录密度的至少两种类型的光盘上分别聚焦具有不同波长的至少两束光束。 物镜被分割成具有低NA的光束通过的公共区域和被设计成会聚具有高NA的光束的专用高NA区域。 形成在专用高NA区域上的环形区域的边界独立于从光程差函数获得的边界设计，使得具有高NA的光束基本上会聚在某一点上，并且具有低NA的光束被扩散。

    Diffraction optical element
    90.
    发明授权
    Diffraction optical element 有权
    衍射光学元件

    公开(公告)号：US06624941B2

    公开(公告)日：2003-09-23

    申请号：US10166677

    申请日：2002-06-12

    Applicant: Shuichi Takeuchi ,  Koichi Maruyama

    Inventor： Shuichi Takeuchi ,  Koichi Maruyama

    IPC: G02B2744

    CPC classification number: G02B5/1876

    Abstract: A diffraction optical element is configured such that a plurality of annular zones having minute steps extending in a direction of the optical axis therebetween are formed on a base element. The plurality of annular zones include narrow and wide zones respectively satisfying conditions (1) and (2): &Dgr;Z(i) (3/2)·&Dgr;E(i)  (2), wherein, i represents the order of the steps counted from the optical axis, &Dgr;E(i) represents an absolute value of an OPD provided by the i-th step, and &Dgr;Z(i) represents an absolute value of a difference between OPDs provided, with respect to a base curve, by an inner side end portion and outer side end portion of an annular zone between an i-th step and (i+1)-th step.

    Abstract translation: 衍射光学元件被构造成使得在基底元件上形成具有沿其光轴方向延伸的微小台阶的多个环形区域。 多个环形区域包括分别满足条件（1）和（2）的狭窄宽区域：其中，i表示从光轴计数的步骤的顺序，DeltaE（i）表示由光轴提供的OPD的绝对值 第i步，并且DeltaZ（i）表示在第i步和第i步之间的环形区的内侧端部和外侧端部之间相对于基线曲线提供的OPD之间的差的绝对值 （i + 1）步。

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