公开(公告)号：US07038862B2

公开(公告)日：2006-05-02

申请号：US10867781

申请日：2004-06-16

Applicant: Koichi Maruyama ,  Daisuke Koreeda

Inventor： Koichi Maruyama ,  Daisuke Koreeda

IPC: G02B3/02

CPC classification number: G11B7/1374 ,  G02B5/188 ,  G02B5/1895 ,  G02B13/146 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1353 ,  G11B2007/0006

Abstract: An objective lens that satisfies conditions: −0.02

Abstract translation: 满足条件的物镜：<？in-line-formula description =“In-line formula”end =“lead”？> - 0.02 <？in-line-formula description =”In-line Formulas“end =”lead“？> - 0.02 <？in-line-formula description =“In-line Formulas”end =“lead”？> - 0.29 物镜的透镜表面中的至少一个包括具有用于将第三光束会聚的第一区域的衍射结构 第三光盘的数据记录层。 第一区域内的衍射结构被配置为使得第一光束的衍射效率最大化的衍射级为六阶，第二光束的衍射效率最大化的衍射级为四阶， 并且第三光束的衍射效率最大化的衍射级是三阶。

公开(公告)号：US07019768B2

公开(公告)日：2006-03-28

申请号：US10721908

申请日：2003-11-26

Applicant: Shuichi Takeuchi ,  Daisuke Koreeda

Inventor： Shuichi Takeuchi ,  Daisuke Koreeda

IPC: G02B26/10 ,  B41J2/47

CPC classification number: G02B5/1895 ,  B41J2/471 ,  G02B5/1876 ,  G02B26/124

Abstract: There is provided a scanning optical system including a collimator lens being placed on an optical path between a light source and a deflecting system. At least one of a front surface and a rear surface of the collimator lens includes a central area through which part of the laser beam in the vicinity of a central axis of the laser beam passes, at least one first outer area having an effect on the laser beam so that the laser beam after passing through said at least one first outer area is given a first phase difference not including a phase difference of zero, and at least one second outer area having an effect on the laser beam so that the laser beam after passing through said at least one second outer area is given a second phase difference being different from the first phase difference and including a phase difference of zero.

Abstract translation: 提供了一种扫描光学系统，其包括放置在光源和偏转系统之间的光路上的准直透镜。 准直透镜的前表面和后表面中的至少一个包括激光束的中心轴附近的激光束的一部分通过的中心区域，至少一个第一外部区域， 激光束，使得在穿过所述至少一个第一外部区域之后的激光束被给予不包括零相位差的第一相位差和至少一个对激光束具有影响的第二外部区域，使得激光束 在通过所述至少一个第二外部区域之后，给予不同于第一相位差并包括零相位差的第二相位差。

公开(公告)号：US06937374B2

公开(公告)日：2005-08-30

申请号：US10792737

申请日：2004-03-05

Applicant: Takashi Iizuka ,  Daisuke Koreeda

Inventor： Takashi Iizuka ,  Daisuke Koreeda

IPC: B41J2/44 ,  G02B13/00 ,  G02B13/08 ,  G02B13/18 ,  G02B26/10 ,  G02B26/12 ,  H04N1/113 ,  G02B26/08

CPC classification number: G02B26/123

Abstract: A scanning optical system includes a polygonal mirror that deflects the even number of beams, which are incident thereon along optical paths arranged symmetrically with respect to a plane perpendicular to a rotation axis thereof. An imaging optical system for converging the beams includes lenses for converging the beam, in an auxiliary scanning direction, respectively. The lenses have the same shapes, and are arranged symmetrically with respect to the plane. The orientation of the lenses on one side of the plane is oriented oppositely, in the auxiliary scanning direction, to the other lenses located on the other side of the plane.

Abstract translation: 扫描光学系统包括多边形镜，其使沿着与其旋转轴线垂直的平面对称布置的光路入射到其上的偶数个光束。 用于会聚光束的成像光学系统包括用于在辅助扫描方向上会聚光束的透镜。 透镜具有相同的形状，并且相对于平面对称地布置。 在该平面的一侧上的透镜的取向在辅助扫描方向上相对于位于该平面另一侧的其它透镜。

公开(公告)号：US20050073937A1

公开(公告)日：2005-04-07

申请号：US10956132

申请日：2004-10-04

Applicant: Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

Inventor： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

IPC: G11B7/00 ,  G11B7/135

CPC classification number: G11B7/1392 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

Abstract: 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

Abstract translation: 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

公开(公告)号：US20050002118A1

公开(公告)日：2005-01-06

申请号：US10867781

申请日：2004-06-16

Applicant: Koichi Maruyama ,  Daisuke Koreeda

Inventor： Koichi Maruyama ,  Daisuke Koreeda

IPC: G02B13/14 ,  G02B27/00 ,  G11B7/00 ,  G11B7/135 ,  G02B3/02 ,  G02B13/18

CPC classification number: G11B7/1374 ,  G02B5/188 ,  G02B5/1895 ,  G02B13/146 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1353 ,  G11B2007/0006

Abstract: An objective lens that satisfies conditions: −0.02

Abstract translation: 满足条件的物镜：-0.02

公开(公告)号：US08072694B2

公开(公告)日：2011-12-06

申请号：US12046751

申请日：2008-03-12

Applicant: Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

Inventor： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

IPC: G02B3/08

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）。

公开(公告)号：US08068401B2

公开(公告)日：2011-11-29

申请号：US12357462

申请日：2009-01-22

Applicant: Daisuke Koreeda ,  Shuichi Takeuchi ,  Yoshiyuki Tashiro

Inventor： Daisuke Koreeda ,  Shuichi Takeuchi ,  Yoshiyuki Tashiro

IPC: G11B7/00

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

Abstract: There is provided an objective optical system used for information recording/reproducing for three types of optical discs. The objective optical system includes an objective lens, and a diffraction structure formed on an optical surface. The diffraction structure includes a first area for contributing to converging the third light beam. The first area includes first and second steps defined by first and second optical path difference functions, respectively. The first step is configured such that diffraction orders at which diffraction efficiencies for the first, second and third light beams are maximized are 1st order, 0-th order and 0-th order, respectively. The first step satisfies a condition: −0.36×102

Abstract translation: 提供了用于三种类型的光盘的信息记录/再现的物镜光学系统。 物镜光学系统包括物镜和形成在光学表面上的衍射结构。 衍射结构包括用于有助于会聚第三光束的第一区域。 第一区域包括分别由第一和第二光程差函数限定的第一和第二步骤。 第一级被配置为使得第一，第二和第三光束的衍射效率最大化的衍射级分别为1级，0级和0级。 第一步满足条件：-0.36×102

公开(公告)号：US07872958B2

公开(公告)日：2011-01-18

申请号：US11752386

申请日：2007-05-23

Applicant: Yoshiyuki Tashiro ,  Daisuke Koreeda ,  Koichi Maruyama

Inventor： Yoshiyuki Tashiro ,  Daisuke Koreeda ,  Koichi Maruyama

IPC: G11B7/135

CPC classification number: G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

Abstract: In an optical information recording/reproducing device which executes information reading or writing on multiple types of optical discs having different data densities by selectively using first through third light beams having first through third wavelengths, respectively, at least one side of an optical element is provided with a step structure including a plurality of concentric refracting surfaces and steps between them. The steps include first steps each giving a first optical path length difference specified by a first optical path difference function, second steps each giving a second optical path length difference specified by a second optical path difference function, and special steps each giving an optical path length difference obtained by the sum or difference of/between the first and second optical path length differences. Annular zone widths between adjacent steps are set at 10 times the first wavelength or more.

Abstract translation: 在通过选择性地使用具有第一至第三波长的第一至第三光束执行信息读取或写入具有不同数据密度的多种类型的光盘的光学信息记录/再现装置中，分别提供光学元件的至少一侧 具有包括多个同心折射表面和它们之间的台阶的台阶结构。 这些步骤包括第一步骤，每个步骤给出由第一光程差函数指定的第一光程长度差，每个给出由第二光程差函数指定的第二光程长度差的第二步，以及各自给出光程长度 通过第一和第二光程长度差的和/之差获得的差。 相邻步骤之间的环带宽度设定为第一波长的10倍以上。

公开(公告)号：US07778139B2

公开(公告)日：2010-08-17

申请号：US11873105

申请日：2007-10-16

Applicant: Daisuke Koreeda ,  Shuichi Takeuchi

Inventor： Daisuke Koreeda ,  Shuichi Takeuchi

IPC: G11B7/135

CPC classification number: G11B7/13922 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: There is provided an objective lens used for an optical information recording/reproducing device for recording information to and/or reproducing information from two types of optical discs, by selectively using one of two types of substantially collimated light beams including first and second light beams. When wavelengths of the first and second light beams are respectively represented by λ1 (nm) and λ2 (nm), λ1

Abstract translation: 提供了一种用于光信息记录/再现装置的物镜，用于通过选择性地使用包括第一和第二光束的两种类型的基本上准直的光束中的一种来从两种类型的光盘记录信息和/或再现信息。 当第一和第二光束的波长分别由λ1（nm）和λ2（nm）表示时，满足λ1<λ2。 物镜包括第一光学元件和由与第一光学元件不同的材料制成的第二光学元件。 第一和第二光学元件通过固井表面胶合。 此外，物镜被配置为满足以下条件：0.006 <{（nR·丁·2·n························（{ 2 3）+ 8×A fort 42}×f ud 1 3 + 2.29] <0.038。 （1）

公开(公告)号：US07742370B2

公开(公告)日：2010-06-22

申请号：US11419810

申请日：2006-05-23

Applicant: Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

Inventor： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi

IPC: G11B7/00

CPC classification number: G11B7/1275 ,  G02B5/1876 ,  G02B5/1895 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

Abstract: 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

Abstract translation: 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。