公开(公告)号：US07280276B2

公开(公告)日：2007-10-09

申请号：US10937290

申请日：2004-09-10

申请人： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi ,  Naohito Sasaki

发明人： Daisuke Koreeda ,  Koichi Maruyama ,  Shuichi Takeuchi ,  Naohito Sasaki

IPC分类号： G11B7/00 ,  G02B1/10

CPC分类号： G11B7/1374 ,  G02B1/11 ,  G02B13/18

摘要： 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

摘要翻译： 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：＆lt;线内公式描述=“在线公式 “end =”lead“？> 0.6 其中h 1表示光轴与 反射率呈现局部最大值的位置，hmax表示物镜的有效直径的光轴与最外侧位置之间的距离。

公开(公告)号：US07042608B2

公开(公告)日：2006-05-09

申请号：US10663643

申请日：2003-09-17

申请人： Shuichi Takeuchi ,  Daisuke Koreeda

发明人： Shuichi Takeuchi ,  Daisuke Koreeda

IPC分类号： G02B26/08

CPC分类号： G06K15/1209 ,  G02B26/124 ,  G03G15/0435

摘要： In a scanning optical system, a partial light blocking member having an annular light blocking part (for blocking off part of the incident laser beam entering the annular area around the central axis of the laser beam) is placed on an optical path between the laser light source and the polygon mirror. The scanning optical system including such a partial light blocking member is installed in a printer. By the effect of the partial light blocking member, 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： 在扫描光学系统中，具有环形遮光部分（用于阻挡入射到激光束的中心轴线周围的环形区域的入射激光束的一部分）的局部遮光构件被放置在激光 源和多面镜。 包括这种部分遮光构件的扫描光学系统安装在打印机中。 通过部分遮光构件的作用，即使在扫描光学系统的成像光学系统的光学表面具有特定的微小波动的情况下，也防止了旁瓣（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发生的黑色条纹。

公开(公告)号：US07035193B2

公开(公告)日：2006-04-25

申请号：US11033741

申请日：2005-01-13

申请人： Shuichi Takeuchi ,  Koichi Maruyama ,  Daisuke Koreeda

发明人： Shuichi Takeuchi ,  Koichi Maruyama ,  Daisuke Koreeda

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

摘要： 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

摘要翻译： 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。

公开(公告)号：US20050281173A1

公开(公告)日：2005-12-22

申请号：US11155477

申请日：2005-06-20

申请人： Daisuke Koreeda ,  Koichi Maruyama

发明人： Daisuke Koreeda ,  Koichi Maruyama

IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： An objective lens for an optical pick-up which is used to record data to and/or to reproduce data from at least three types of optical discs by selectively using one of at least three light beams having different wavelengths is provided. When thicknesses of a first, second and optical discs are represented by t1, t2 and t3, respectively, a relationship t1≦t2 NA3 is satisfied. The first, second and third light beams are incident on the objective lens as substantially collimated light beams, respectively. In this configuration, at least one of surfaces of the objective lens includes a first area for attaining the numerical aperture required for recording data to and/or reproducing data from the third optical disc, and a second area located outside the first area. The first area includes an inner area including an optical axis of the objective lens, and an outer area located outside the inner area. The outer area is configured to converge the third light beam on a data recording layer of the third optical disc with an amount of an aberration being substantially zero. The objective lens satisfies a condition: 0.75

摘要翻译： 提供了一种用于通过选择性地使用具有不同波长的至少三个光束中的至少三种类型的光盘来记录数据和/或从至少三种类型的光盘再现数据的用于光学拾取器的物镜。 当第一，第二和光盘的厚度分别由t 1，t 2和t 3表示时，满足关系t 1 <= t 2 = NA 2> NA 3。 第一，第二和第三光束分别作为基本准直的光束入射在物镜上。 在该配置中，物镜的至少一个表面包括用于获得从第三光盘记录数据和/或再现数据所需的数值孔的第一区域和位于第一区域外的第二区域。 第一区域包括包括物镜的光轴的内部区域和位于内部区域外部的外部区域。 外部区域被配置为将第三光束会聚在第三光盘的数据记录层上，其像差量基本为零。 物镜满足条件：0.75

公开(公告)号：US06958839B2

公开(公告)日：2005-10-25

申请号：US10142147

申请日：2002-05-10

申请人： Daisuke Koreeda

发明人： Daisuke Koreeda

IPC分类号： B41J2/44 ,  G02B3/06 ,  G02B13/00 ,  G02B13/08 ,  G02B13/18 ,  G02B26/10 ,  H04N1/036 ,  H04N1/04 ,  H04N1/113 ,  H04N1/12 ,  G02B26/08

CPC分类号： H04N1/1135 ,  H04N1/12 ,  H04N2201/0446

摘要： A scanning optical system is configured to include a light source, an anamorphic optical element, a polygonal mirror, and an imaging optical system. The imaging optical system has a scanning lens including a first lens provided on a polygonal mirror side and a second lens provided on a surface side, and a compensation lens provided on the surface side with respect to the scanning lens, the compensation lens compensating for curvature of field. The scanning lens includes at least one convex surface that has a toric surface having a stronger power in the auxiliary scanning direction than in the main scanning direction. One surface of the compensation lens has an anamorphic aspherical surface, which is a surface whose radius of curvature in the auxiliary scanning direction at a point spaced from the optical axis thereof is determined independently from a cross-sectional shape thereof along the main scanning direction.

摘要翻译： 扫描光学系统被配置为包括光源，变形光学元件，多面镜和成像光学系统。 成像光学系统具有包括设置在多面镜侧的第一透镜和设置在表面侧的第二透镜的扫描透镜和设置在相对于扫描透镜的表面侧的补偿透镜，补偿透镜补偿曲率 的领域。 扫描透镜包括至少一个凸面，其具有在辅助扫描方向上比在主扫描方向上更强的功率的复曲面。 补偿透镜的一个表面具有变形非球面，该变形非球面表面的辅助扫描方向上的与其光轴隔开的点的曲率半径独立于主扫描方向的横截面形状来确定。

公开(公告)号：US06956686B2

公开(公告)日：2005-10-18

申请号：US10142149

申请日：2002-05-10

申请人： Daisuke Koreeda

发明人： Daisuke Koreeda

IPC分类号： B41J2/47 ,  G02B26/12 ,  G02B26/08

CPC分类号： B41J2/471 ,  G02B26/125

摘要： A scanning optical system includes a light source, an anamorphic optical element, a polygonal mirror, and an imaging optical system that converges the beam(s) on a surface to be scanned. The imaging optical system has a scanning lens, and a compensation lens provided on the surface side for compensating for curvature of field. All the surfaces of the scanning lens are rotationally symmetrical, and the compensation lens has an aspherical surface. A cross section of the aspherical surface in the auxiliary scanning direction is asymmetrical with respect to the optical axis thereof, and a SAG amount defining the aspherical surface is expressed by a two-dimensional polynomial.

摘要翻译： 扫描光学系统包括光源，变形光学元件，多面镜以及将光束会聚在要扫描的表面上的成像光学系统。 成像光学系统具有扫描透镜和设置在表面侧的用于补偿曲率的补偿透镜。 扫描透镜的所有表面是旋转对称的，并且补偿透镜具有非球面。 辅助扫描方向上的非球面的横截面相对于其光轴是不对称的，并且限定非球面的SAG量由二维多项式表示。

公开(公告)号：US06906824B1

公开(公告)日：2005-06-14

申请号：US09652008

申请日：2000-08-31

申请人： Junji Kamikubo ,  Daisuke Koreeda

发明人： Junji Kamikubo ,  Daisuke Koreeda

IPC分类号： G02B13/00 ,  G02B26/12 ,  G02B27/44 ,  G06K15/12 ,  G06K15/00 ,  G02B26/00 ,  G02B27/00

CPC分类号： G02B27/4211 ,  G02B13/0005 ,  G02B26/125 ,  G02B27/4227 ,  G02B27/4283 ,  G06K15/129

摘要： A tandem type printer is provided with a plurality of scanning optical systems, a plurality of fθ lenses and photoconductive drums, which correspond to the scanning optical systems, respectively. Each scanning optical system includes a laser source and a deflector that deflects the laser beam emitted by the laser source to scan, in a main scanning direction, within a predetermined angular range. The deflected laser beam is converged by the fθ lens on the corresponding photoconductive drum and form an image. Images formed on the plurality of photoconductive drums are developed and transferred on a sheet in an overlaid fashion. Each fθ lens includes a glass lens that is burdened with substantially all the power, in the main scanning direction, of the fθ lens, and a plastic lens that is burdened with compensation for aberrations of the fθ lens. Further, a diffraction lens structure is formed to compensate for a lateral chromatic aberration of the fθ lens in the main scanning direction. Each fθ lens satisfies conditions: 0.0

摘要翻译： 串联式打印机分别具有对应于扫描光学系统的多个扫描光学系统，多个透镜和感光鼓。 每个扫描光学系统包括激光源和偏转器，其使由激光源发射的激光束偏转，以在主扫描方向上在预定角度范围内扫描。 偏转的激光束由ftheta透镜会聚在相应的感光鼓上并形成图像。 形成在多个感光鼓上的图像​​以叠加的方式显影并转印在片材上。 每个晶片透镜包括玻璃透镜，其在主扫描方向上具有基本上所有功率的透镜，以及塑料透镜，该透镜具有用于补偿透镜的像差的塑料透镜。 此外，形成衍射透镜结构以补偿在主扫描方向上的透镜的横向色差。 每个ftheta透镜满足条件：<？in-line-formula description =“In-line Formulas”end =“lead”？> 0.0 <？in-line-formula description =”In-line Formulas“end =”lead“？> 0.75

公开(公告)号：US20050078593A1

公开(公告)日：2005-04-14

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 ,  G11B7/125 ,  G11B7/135

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，第二第三光盘的覆盖层的厚度t1，t2和t3分别为t1≅0.6mm，t2≅0.6mm，t3≅1.2mm。 第一，第二和第三光盘的数值孔径NA1，NA2和NA3满足关系NA1> = NA2> NA3。 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。 关于第一，第二和第三光盘的物镜M1，M2和M3以及焦距f1，f2和f3，满足以下条件（1），（2）和（3）：-0.02

公开(公告)号：US06790389B2

公开(公告)日：2004-09-14

申请号：US09987871

申请日：2001-11-16

申请人： Daisuke Koreeda ,  Junji Kamikubo

发明人： Daisuke Koreeda ,  Junji Kamikubo

IPC分类号： B29D1100

CPC分类号： G02B3/0025 ,  G02B3/0031 ,  G02B3/005 ,  G02B3/0068 ,  G02B3/0075 ,  G02B26/123 ,  Y10S425/808

摘要： Disclosed is a manufacturing method of a complex lens for a tandem scanning optical system that includes a step for preparing molding dies for forming a cavity to form the complex lens as a single-piece element, and a step for injecting lens material into the cavity. The molding dies include a pair of single-piece mirror surface cores that form a plurality of lens surfaces of the complex lens at an incident side and a plurality of lens surfaces at an exit side, respectively. The complex lens has a plurality of stacked lens portions and the lens portions converging a plurality of light beams, which are modulated independently and deflected by a deflector, onto a surface to be scanned, respectively, for forming a plurality of scanning lines at the same time.

摘要翻译： 公开了一种用于串联扫描光学系统的复合透镜的制造方法，其包括用于形成用于形成空腔以形成复合透镜作为单件元件的模具的步骤，以及用于将透镜材料注入到腔体中的步骤。 成形模具包括分别在入射侧形成复合透镜的多个透镜表面的一对单片镜面芯和在出射侧的多个透镜表面。 复合透镜具有多个层叠的透镜部分，并且透镜部分将由偏转器独立调制和偏转的多个光束分别聚焦到待扫描的表面上，以形成多个扫描线 时间。

公开(公告)号：US06522476B2

公开(公告)日：2003-02-18

申请号：US09774722

申请日：2001-02-01

申请人： Daisuke Koreeda

发明人： Daisuke Koreeda

IPC分类号： G02B1514

CPC分类号： G02B15/177

摘要： A three-group zoom lens has, from an object side, a first group lens having a positive power, a second group lens having a negative power and a third group lens consisting of a positive lens. The second lens group includes an aperture stop. When a distance to be focused is infinity, only the first lens group and the second lens group move for zooming. At least one positive lens included in the zoom lens has an aspherical surface whose positive power is greater at a portion farther from an optical axis thereof. The zoom lens satisfies the following conditions: −0.85

摘要翻译： 三组变焦透镜从物体侧具有具有正光焦度的第一组透镜，具有负光焦度的第二组透镜和由正透镜组成的第三组透镜。 第二透镜组包括孔径光阑。 当要聚焦的距离是无限远时，只有第一透镜组和第二透镜组移动以进行变焦。 包括在变焦透镜中的至少一个正透镜具有非球面，其正功率在远离其光轴的部分处更大。 变焦透镜满足以下条件：其中，fw表示位于宽端的焦距，f1，f2和f3分别表示第一透镜组，第二透镜组和第三透镜组的焦距。