公开(公告)号：US06937374B2

公开(公告)日：2005-08-30

申请号：US10792737

申请日：2004-03-05

申请人： Takashi Iizuka ,  Daisuke Koreeda

发明人： Takashi Iizuka ,  Daisuke Koreeda

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

CPC分类号： G02B26/123

摘要： 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.

摘要翻译： 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：US06771406B2

公开(公告)日：2004-08-03

申请号：US10173613

申请日：2002-06-19

申请人： Takashi Iizuka ,  Daisuke Koreeda

发明人： Takashi Iizuka ,  Daisuke Koreeda

IPC分类号： G02B2608

CPC分类号： G02B26/123

摘要： 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.

公开(公告)号：US07430159B2

公开(公告)日：2008-09-30

申请号：US11036989

申请日：2005-01-19

申请人： Daisuke Koreeda ,  Koichi Maruyama

发明人： Daisuke Koreeda ,  Koichi Maruyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B7/1374 ,  G11B2007/0006

摘要： There is provided an optical pick-up used for recording data to and/or reproducing data from at least three types of optical discs having at least two different thicknesses of cover layers. The optical pick-up includes light sources and an objective lens. A thickness t1 of a first optical disc, a thickness t2 of a second optical disc, and a thickness t3 of a third optical disc satisfy a relationship t1≦t2 NA3. Further, a first light beam for the first optical disc is incident on the objective lens as a converging light beam, and the second and third light beams for the second and third optical discs are incident on the objective lens as diverging light beams, respectively. Given that magnification of the objective lens is m1 when the first optical disc is used, magnification of the objective lens is m2 when the second optical disc is used, and magnification of the objective lens is m3 when the first optical disc is used, following conditions are satisfied: m1>0, m3

摘要翻译： 提供了一种用于将数据记录到至少三种类型的具有至少两个不同厚度的覆盖层厚度的光盘中的数据的光学拾取器。 光学拾取器包括光源和物镜。 第一光盘的厚度t 1，第二光盘的厚度t 2和第三光盘的厚度t 3满足关系t 1 <= t 2 = NA 2> NA 3。 此外，用于第一光盘的第一光束作为会聚光束入射在物镜上，并且用于第二和第三光盘的第二和第三光束分别作为发散光束入射在物镜上。 假设当使用第一光盘时物镜的放大倍数为m 1，当使用第二光盘时物镜的倍率为m 2，并且当使用第一光盘时物镜的倍率为m 3 满足以下条件：m 1> 0，m 3

公开(公告)号：US20070297314A1

公开(公告)日：2007-12-27

申请号：US11765498

申请日：2007-06-20

申请人： Daisuke Koreeda ,  Shuichi Takeuchi

发明人： Daisuke Koreeda ,  Shuichi Takeuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B2007/0006

摘要： There is provided an objective lens including a first optical member and a second optical member which are made of materials different from each other and are cemented together at a cementing surface. The cementing surface includes a first phase shift structure having a plurality of refractive surface zones concentrically formed about an optical axis of the objective lens. The first phase shift structure satisfies conditions (1) and (2): 0.85

公开(公告)号：US07023596B2

公开(公告)日：2006-04-04

申请号：US10356490

申请日：2003-02-03

申请人： Daisuke Koreeda

发明人： Daisuke Koreeda

IPC分类号： G02B26/08

CPC分类号： G02B26/125

摘要： A scanning optical system includes first and a second lens elements, at least one of which is a plastic lens element. Each surface of the plastic lens element is an aspherical surface that is configured such that a shape in a main scanning plane is defined as a function of a distance, in the main scanning direction, from a surface reference axis thereof, and that a curvature in an auxiliary scanning plane which is perpendicular to the main scanning plane is defined as another function of a distance, in the main scanning direction, from the surface reference axis. At least one of the two surfaces of the plastic lens element are arranged such that the surface reference axis thereof is decentered from an axis of the beam in the auxiliary scanning direction.

公开(公告)号：US06977781B2

公开(公告)日：2005-12-20

申请号：US10652033

申请日：2003-09-02

申请人： Shuichi Takeuchi ,  Daisuke Koreeda

发明人： Shuichi Takeuchi ,  Daisuke Koreeda

IPC分类号： B41J2/385 ,  G02B9/00 ,  G02B9/08 ,  G02B17/00 ,  G02B26/08 ,  G02B26/12 ,  G02B27/09 ,  G02B27/58 ,  G03G13/04 ,  H04N1/04

CPC分类号： G02B27/0988 ,  G02B26/124 ,  G02B27/58

摘要： A phase shift element having a central area (for transmitting part of an incident laser beam in the vicinity of the beam central axis) and a first area (giving the laser beam incident thereon a phase difference π relative to a beam passing through the central area) is placed on an optical path between a laser light source and a polygon mirror of a scanning optical system. The scanning optical system including such a phase shift element is installed in a printer. By the effect of the phase shift element, the intensity of side lobes (several rings of light accompanying the main beam) is prevented from exceeding a threshold value even when optical surfaces of an imaging optical system of the scanning optical system have certain microscopic undulations, by which black stripes occurring in halftone printing can be eliminated.

摘要翻译： 一种相移元件，其具有中心区域（用于传递入射激光束在光束中心轴附近的一部分）和第一区域（给予入射到其上的激光束相对于穿过中心区域的光束的相位差pi） ）放置在扫描光学系统的激光光源和多面镜之间的光路上。 包括这种相移元件的扫描光学系统安装在打印机中。 通过相移元件的作用，即使在扫描光学系统的成像光学系统的光学表面具有一定的微小波动的情况下，也能够防止旁瓣（伴随主光束的几个光环）的强度超过阈值， 可以消除在半色调印刷中出现的黑色条纹。

公开(公告)号：US06384968B1

公开(公告)日：2002-05-07

申请号：US09585646

申请日：2000-06-01

申请人： Eiichi Ito ,  Daisuke Koreeda ,  Satoru Tachihara

发明人： Eiichi Ito ,  Daisuke Koreeda ,  Satoru Tachihara

IPC分类号： G02B2106

CPC分类号： G02B7/20 ,  G02B21/0012 ,  G02B21/06 ,  G02B21/22

摘要： The optical system of the microscope includes a close-up optical system that faces an object, a pair of imaging optical systems that take object light rays passing through regions of the close-up optical system, and an illuminating optical system that guides illumination light emitted from a light source to illuminate the object. Each lens included in the close-up optical system has a semicircular shape in which one side is cut out. The close-up optical system is held in a first lens barrel, and the illuminating optical system is held in a second lens barrel. The second lens barrel is arranged in the cutout space of the close-up optical system inside the first lens barrel. A light shielding member is attached to the second lens barrel to prevent a leak of the illumination light through grooves formed on the second lens barrel.

公开(公告)号：US06275318B1

公开(公告)日：2001-08-14

申请号：US09339297

申请日：1999-06-24

申请人： Junji Kamikubo ,  Daisuke Koreeda

发明人： Junji Kamikubo ,  Daisuke Koreeda

IPC分类号： G02B2608

CPC分类号： G02B26/125

摘要： A linear imaging lens element for a scanning optical system in which light flux from a light source is formed as a linear image in the vicinity of a reflection surface of a light deflector includes a progressive power toric-aspherical surface being provided on either a surface facing the light source or on a surface facing the deflector. Cross-sectional configurations of the progressive power toric-aspherical surface, which are parallel with the plane including the optical axis and being perpendicular to the linear image, are made to be a circular arc, and the radius of curvature of each circular arc cross-sectional configuration is independently determined from the cross-sectional configuration lain on the plane which includes the optical axis and is parallel with the linear image.

摘要翻译： 一种用于扫描光学系统的线性成像透镜元件，其中来自光源的光束在光偏转器的反射表面附近形成为线性图像，包括渐进屈光力复曲面非球面，其设置在面向 光源或面向偏转器的表面上。 与包括光轴并且垂直于线性图像的平面平行的渐进屈光力复曲面非球面的横截面构造被制成圆弧，并且每个圆弧交叉的曲率半径 截面结构由包括光轴的平面上的横截面形状独立地确定并且与线性图像平行。

公开(公告)号：US07839752B2

公开(公告)日：2010-11-23

申请号：US11536004

申请日：2006-09-28

申请人： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi ,  Yoshiyuki Tashiro

发明人： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi ,  Yoshiyuki Tashiro

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。

公开(公告)号：US07239598B2

公开(公告)日：2007-07-03

申请号：US10867736

申请日：2004-06-16

申请人： Koichi Maruyama ,  Daisuke Koreeda

发明人： Koichi Maruyama ,  Daisuke Koreeda

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

摘要： There is provided an objective lens for an optical pick-up which is used to record/reproduce data to/from at least three types of optical discs. Thicknesses t1, t2 and t3 of cover layers of first, second third optical discs are t1≅0.6 mm, t2≅0.6 mm, and t3≅1.2 mm. Numerical apertures NA1, NA2 and NA3 for the first, second and third optical discs satisfy a relationship NA1≧NA2>NA3. When the first optical disc is used, a substantially collimated light beam is incident on the objective lens. When the second or third optical disc is used, a diverging beam is incident on the objective lens. With regard to magnifications M1, M2 and M3 and focal lengths f1, f2 and f3 of the objective lens for the first, second and third optical discs, the following conditions (1), (2) and (3) are satisfied: −0.02

摘要翻译： 提供了用于光学拾取器的物镜，其用于向/从至少三种类型的光盘记录/再现数据。 第一，第二三个光盘的覆盖层的厚度t 1，t 2和t 3分别为t 1≅0.6mm，t 2≅0.6 mm，t 3≅1.2mm。 第一，第二和第三光盘的数值孔径NA 1，NA 2和NA 3满足关系NA 1> = NA 2> NA 3。 当使用第一光盘时，基本上准直的光束入射到物镜上。 当使用第二或第三光盘时，发散光束入射到物镜上。 关于用于第一，第二和第三光盘的物镜的放大率M 1，M 2和M 3以及焦距f 1，f 2和f 3，以下条件（1），（2）和（3 ）满足：<？in-line-formula description =“In-line formula”end =“lead”？> - 0.02 <？in-line-formula description =“In-line Formulas”end =“lead”？> - 0.10 <？in-line-formula description =”In-line Formulas“end =”lead“？> - 0.29