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    • 62. 发明授权
    • Optical information recording /reproducing device and objective lens for the same
    • 光信息记录/再现装置和物镜相同
    • US07843792B2
    • 2010-11-30
    • US11765498
    • 2007-06-20
    • Daisuke KoreedaShuichi Takeuchi
    • Daisuke KoreedaShuichi Takeuchi
    • G11B7/135
    • G11B7/1374G11B7/1353G11B2007/0006
    • 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
    • 提供了一种包括第一光学构件和第二光学构件的物镜,其由彼此不同的材料制成并且在固结表面处粘合在一起。 固定表面包括具有围绕物镜的光轴同心地形成的多个折射表面区的第一相移结构。 第一相移结构满足条件(1)和(2):0.85 <Φ2/Φ1<1.15(1)0.10 <|(Φ3-Φ2)/Φ1| <0.50(2)其中Φ1= m(λ1)× λ1/(n2(λ1)-n1(λ1))),Φ2= m(λ2)×(λ2/(n2(λ2)-n1(λ2))),Φ3= m(λ3)×(λ3/(n2 (λ3)-n1(λ3))),m(λ1),m(λ2)和m(λ3)分别为第一至第三光束的衍射效率最大化的衍射级,n1(λ1) n1(λ2),n1(λ3)分别为第一光学部件的折射率,n2(λ1),n2(λ2),n2(λ3)分别为第二光学部件的折射率。
    • 64. 发明授权
    • Optical system with objective lens having diffraction structure
    • 具有衍射结构物镜的光学系统
    • US07411884B2
    • 2008-08-12
    • US10643899
    • 2003-08-20
    • Shuichi Takeuchi
    • Shuichi Takeuchi
    • G11B7/135
    • G11B7/139G11B7/1353G11B7/1374G11B7/13922G11B2007/0006
    • An optical system for an optical disc drive includes a light source, an objective lens and a collimator lens. The light source emits first and second light beams. The first light beam is for reproducing data from a digital versatile disc while the second light beam is for a compact disc. The objective lens is provided with a diffraction structure which is designed to focus the first light beam on a recording layer of the digital versatile disc and the second light beam on a recording layer of the compact disc. The collimator lens is disposed between the light source and the objective lens. The collimator lens adjusts the diverging/converging angle of the first and second light beams entering the objective lens. The change in spherical aberration of the first light beam caused by wavelength deviation from a design wavelength due to individual specificity of the light source is corrected by adjusting the diverging/converging angle of the first light beam emerging from the collimator lens.
    • 用于光盘驱动器的光学系统包括光源,物镜和准直透镜。 光源发射第一和第二光束。 第一光束用于从数字通用光盘再现数据,而第二光束用于光盘。 该物镜设置有衍射结构,该衍射结构被设计成将第一光束聚焦在数字通用盘的记录层上,而第二光束聚焦在光盘的记录层上。 准直透镜设置在光源和物镜之间。 准直透镜调节进入物镜的第一和第二光束的发散/会聚角度。 通过调整从准直透镜出射的第一光束的发散/收敛角度来校正由于光源的个体特异性而导致的与设计波长的波长偏差引起的第一光束的球面像差的变化。
    • 67. 发明授权
    • Objective lens for optical pick-up
    • 物镜用于光学拾取
    • US07106525B2
    • 2006-09-12
    • US10752707
    • 2004-01-08
    • Shuichi TakeuchiKoichi Maruyama
    • Shuichi TakeuchiKoichi Maruyama
    • G02B13/18G02B3/02G11B7/00G11B7/135
    • G11B7/139G11B7/1353G11B7/1374G11B2007/0006
    • There is provided an objective lens for an optical pick-up used for different types of optical discs. The objective lens has at least one surface on which a plurality of annular zones are formed. The at least one surface is divided into an inner area having a low NA and an outer area having high NA outside the inner area. Further, with regard to a light beam used for a second optical disc (e.g., a DVD), an optical path difference generated between at least one of steps formed between adjacent annular zones of the plurality of annular zones within the outer area is lower by a predetermined amount than an integral multiple of a wavelength of the light beam used for the second optical disc.
    • 提供了用于不同类型光盘的光学拾取器的物镜。 物镜具有形成多个环形区域的至少一个表面。 所述至少一个表面被分成具有低NA的内部区域和在所述内部区域之外具有高NA的外部区域。 此外,关于用于第二光盘(例如DVD)的光束,在外部区域中的多个环形区域的相邻环形区域之间形成的至少一个台阶之间产生的至少一个台阶之间产生的光程差较小 比用于第二光盘的光束的波长的整数倍的预定量。
    • 68. 发明授权
    • Scanning optical system
    • 扫描光学系统
    • US07106484B2
    • 2006-09-12
    • US10890232
    • 2004-07-14
    • Shuichi TakeuchiTakashi Iizuka
    • Shuichi TakeuchiTakashi Iizuka
    • G02B26/08
    • G02B26/123
    • An scanning optical system includes a light source having a plurality of light emitting points each of which emits a beam, a first optical system that collimates the beams emitted by the light emitting points in regard to a main scanning direction while converging the beams in an auxiliary scanning direction, a deflecting system that dynamically deflects the beams simultaneously in the main scanning direction, and a second optical system that converges the deflected beams on the scan target surface. Further, the second optical system includes a magnification adjustment element whose magnification mS in the main scanning direction on an optical axis thereof is approximately +1 and whose magnification mP in the auxiliary scanning direction on the optical axis thereof is approximately −1.
    • 扫描光学系统包括具有发射光束的多个发光点的光源,第一光学系统,其将由发光点发射的光束相对于主扫描方向准直,同时将光束会聚在辅助光 扫描方向,在主扫描方向上同时动态地偏转光束的偏转系统以及将偏转的光束会聚在扫描目标表面上的第二光学系统。 此外,第二光学系统包括其光轴上的主扫描方向上的放大率mS大约为+1并且其在其轴上的辅助扫描方向上的倍率mP大约为-1的倍率调节元件。
    • 69. 发明授权
    • Scanning optical system
    • 扫描光学系统
    • US07042608B2
    • 2006-05-09
    • US10663643
    • 2003-09-17
    • Shuichi TakeuchiDaisuke Koreeda
    • Shuichi TakeuchiDaisuke Koreeda
    • G02B26/08
    • G06K15/1209G02B26/124G03G15/0435
    • 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.
    • 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。
    • 70. 发明授权
    • Objective lens for optical disc
    • 光学镜片
    • US07035193B2
    • 2006-04-25
    • US11033741
    • 2005-01-13
    • Shuichi TakeuchiKoichi MaruyamaDaisuke Koreeda
    • Shuichi TakeuchiKoichi MaruyamaDaisuke Koreeda
    • G11B7/00
    • G11B7/1374G11B7/1353G11B7/1367G11B7/13922G11B2007/0006
    • 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
    • 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。