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公开(公告)号：US07414948B2
公开(公告)日：2008-08-19
申请号：US10900250
申请日：2004-07-28
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： 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
摘要翻译： 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，后表面的外部区域的内部区域的倾斜度θ2A和斜面θ2B2满足以下条件：<βin-line-formula description = “In-line Formulas”end =“lead”？> - 2.5 （1）<？in-line-formula description =“In-line Formulas”end =“tail”？>
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公开(公告)号：US07224662B2
公开(公告)日：2007-05-29
申请号：US10430212
申请日：2003-05-07
IPC分类号： G11B7/135
CPC分类号： G11B7/139 , G11B7/1353 , G11B7/1374 , G11B2007/0006
摘要： An objective lens for an optical pickup is configured such that, when a light beam having a wavelength corresponding to the optical disc requiring the higher NA is converged on the optical disc requiring the higher NA at the higher NA, the phase of light flux passed through the peripheral area is substantially the same as that passed through the central area. When a light beam having a wavelength corresponding to the optical disc requiring the lower NA is converged on the optical disc requiring the lower NA at the lower NA, the phase of light flux passed through a first annular region included in the peripheral area is different from that passed through the central area, and the phase of light flux passed through a second annular region, which is outside the first region, is substantially the same as that passed through the central area.
摘要翻译： 用于光学拾取器的物镜被配置为使得当具有对应于需要较高NA的光盘的波长的光束会聚在需要较高NA的较高NA的光盘上时，光通量的相位通过 周边区域与通过中心区域的区域基本相同。 当具有对应于需要较低NA的光盘的波长的光束会聚在需要较低NA的较低NA的光盘上时，通过包括在周边区域中的第一环形区域的光通量的相位不同于 并且通过第一区域外的第二环状区域的光束的相位与穿过中央区域的光通量大致相同。
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公开(公告)号：US20050152259A1
公开(公告)日：2005-07-14
申请号：US11033741
申请日：2005-01-13
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。
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公开(公告)号：US20050057811A1
公开(公告)日：2005-03-17
申请号：US10937290
申请日：2004-09-10
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：0.6
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公开(公告)号：US20050041561A1
公开(公告)日：2005-02-24
申请号：US10900250
申请日：2004-07-28
CPC分类号： G11B7/1353 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： 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
摘要翻译： 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
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公开(公告)号：US07280276B2
公开(公告)日：2007-10-09
申请号：US10937290
申请日：2004-09-10
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：US07035193B2
公开(公告)日：2006-04-25
申请号：US11033741
申请日：2005-01-13
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。
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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
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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。
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公开(公告)号：US07019768B2
公开(公告)日：2006-03-28
申请号：US10721908
申请日：2003-11-26
申请人： Shuichi Takeuchi , Daisuke Koreeda
发明人： Shuichi Takeuchi , Daisuke Koreeda
CPC分类号： G02B5/1895 , B41J2/471 , G02B5/1876 , G02B26/124
摘要： 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.
摘要翻译： 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。
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