公开(公告)号：US07671312B2

公开(公告)日：2010-03-02

申请号：US11630945

申请日：2005-06-16

Applicant: Katsuya Sakamoto

Inventor： Katsuya Sakamoto

IPC: G11B7/00

CPC classification number: G02B27/1006 ,  G02B27/141 ,  G02B27/144 ,  G02B27/145 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0006

Abstract: The present invention provides an optical pickup system including a first light source emitting a light flux with a first wavelength; a second light source emitting a light flux with a second wavelength; and a light-converging optical system converging the light flux with the first wavelength from the first light source with a first magnification onto a first reference surface set at a first depth, and converging the light flux with the second wavelength from the second light source with a second magnification onto a second reference surface set at a second depth. The first and second wavelengths, the first and second depths, and the first and second magnifications satisfy: a first condition according to an aberration and a second condition according to a working distance.

Abstract translation: 本发明提供了一种光拾取系统，包括：发射具有第一波长的光束的第一光源; 发射具有第二波长的光束的第二光源; 以及聚光光学系统，将来自第一光源的第一波长的光束以第一倍率收敛到设置在第一深度的第一参考面，并且将来自第二光源的具有第二波长的光束与 第二放大倍率设置在第二深度上的第二参考表面上。 第一和第二波长，第一和第二深度以及第一和第二放大倍数满足：根据像差的第一条件和根据工作距离的第二条件。

公开(公告)号：US07639589B2

公开(公告)日：2009-12-29

申请号：US12000783

申请日：2007-12-17

Applicant: Shinichiro Saito ,  Katsuya Sakamoto

Inventor： Shinichiro Saito ,  Katsuya Sakamoto

IPC: G11B7/135

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

Abstract: An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied: |δSA1/δU|·|δU|+|δSA2/δT|·|δT|≦0.07 λrms where λ represents a wavelength of a light source, δSA1/δU represents a change of a spherical aberration for an object-to-image distance change δU (|δU|≦0.5 mm) and δSA2/δT represents a change of spherical aberration for a temperature change δT (|δT|≦30° C.), the object-to-image distance is a distance between the light source (a light emitting point) and the information recording surface.

Abstract translation: 光学拾取装置的物镜将发散光束会聚到信息记录表面上。 满足以下条件公式：| deltaSA1 / deltaU |。| deltaU | + | deltaSA2 / deltaT |。| deltaT | 其中λ表示光源的波长，deltaSA1 / deltaU表示对象对图像距离变化ΔU（| deltaU | <= 0.5mm）的球面像差的变化，deltaSA2 / deltaT表示球面像差的变化 温度变化ΔT（| deltaT | <= 30℃），物体与图像的距离是光源（发光点）和信息记录表面之间的距离。

公开(公告)号：US20080259767A1

公开(公告)日：2008-10-23

申请号：US12155620

申请日：2008-06-06

Applicant: Mitsuru Mimori ,  Kohei Ota ,  Shinichiro Saito ,  Yuichi Atarashi ,  Katsuya Sakamoto ,  Hidekazu Totsuka ,  Kiyono Ikenaka

Inventor： Mitsuru Mimori ,  Kohei Ota ,  Shinichiro Saito ,  Yuichi Atarashi ,  Katsuya Sakamoto ,  Hidekazu Totsuka ,  Kiyono Ikenaka

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/1275 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An objective optical element of an optical pickup apparatus has a magnification m1 satisfying the following formula for a light flux of the wavelength λ1: − 1/7≦m1≦− 1/25 and |m1|

Abstract translation: 光学拾取装置的物镜光学元件具有满足下列公式的放大倍数m 1对于波长λ1：1/7 <= m 1 <= - 1/25和| m 1 | <| M的光通量 1，其中M 1是从第一光源到波长λ1的光通量的第一光信息记录介质的光学系统倍率。 物镜光学元件包括公共区域和专用区域。 专有区域包括具有抑制由于大气温度升高引起的球面像差增加的功能的专属衍射结构。 通过专用衍射结构的波长λ2的光通量与形成在第二光学信息记录介质的信息记录面上的会聚光点的位置不同的位置与光轴相交。

公开(公告)号：US07382709B2

公开(公告)日：2008-06-03

申请号：US11679204

申请日：2007-02-27

Applicant: Tohru Kimura ,  Katsuya Sakamoto ,  Yuichi Atarashi

Inventor： Tohru Kimura ,  Katsuya Sakamoto ,  Yuichi Atarashi

IPC: G11B7/00

CPC classification number: G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength λ1, λ2 and λ3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1|>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.

Abstract translation: 混合物镜具有在其至少一个光学表面上由多个同轴环形区域构成的折射透镜和衍射光学元件。 当n 1，n 2和n 3各自是当各个光束来到时具有波长λ1，λ2和λ3的第一，第二和第三光束中的每一个的衍射光线中具有最大光量的衍射光线的衍射级数 要分别入射到衍射结构中，满足下列公式：<？in-line-formula description =“In-line formula”end =“lead”？> | n 1 |> | n 2 |和| n 1 |> | n 3 |和<？in-line-formula description =“In-line Formulas”end =“tail”？>混合物镜会聚第1，第2和第3 分别将第一，第二和第三光束的次级衍射光线分别放置到第一，第二蚂蚁第三光学信息记录介质中的每一个的信息记录平面上，以便在各个规定的必要图像侧数值孔径内形成适当的波前。

公开(公告)号：US07187641B2

公开(公告)日：2007-03-06

申请号：US10769848

申请日：2004-02-03

Applicant: Katsuya Sakamoto

Inventor： Katsuya Sakamoto

IPC: G11B7/00

CPC classification number: G11B7/1374

Abstract: An objective lens has a first meniscus-shape lens including a first object-side surface having a positive reflective power; and a second meniscus-shape lens having a positive reflective power. The first meniscus-shape lens and the second meniscus-shape are arranged in that order from an object side. The objective lens satisfies the following formulas: fF/f≦−1.1 LH1H2/f≧0.5 fB/f≧0.2 L/f≦1.3 where f is an object-side focus length of the objective lens, fF is a front focus, fB is a back focus, LH1H2 is a length between an object-side principal point H1 and an image-side principal point H2, and L is a length on an optical axis of the objective lens between the first object-side surface and the second image-side surface.

Abstract translation: 物镜具有包括具有正反射功率的第一物体侧表面的第一弯液面状透镜; 以及具有正反射功率的第二弯液面状透镜。 第一弯月形透镜和第二弯液面形状从物体侧依次排列。 物镜满足下列公式：<？in-line-formula description =“In-line formula”end =“lead”？> fF / f <= - 1.1 <？in-line-formula description =“In-line 公式“end =”tail“？> <？in-line-formula description =”In-line Formulas“end =”lead“？> L H1H2 / f> = 0.5 < -formulae description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line formula”end =“lead”？> fB / f> = 0.2 <？in-line -formulae description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> L / f <= 1.3 <？in-line -formulae description =“In-line Formulas”end =“tail”？>其中f是物镜的物体侧对焦长度，fF是前焦点，fB是后焦点，L H1H2 < SUB>是物体侧主点H 1和图像侧主点H 2之间的长度，L是物镜在第一物体侧表面和第二图像侧之间的光轴上的长度 表面。

公开(公告)号：US20050219988A1

公开(公告)日：2005-10-06

申请号：US11092896

申请日：2005-03-30

Applicant: Yuichi Atarashi ,  Kohei Ota ,  Katsuya Yagi ,  Junji Hashimura ,  Tohru Kimura ,  Katsuya Sakamoto

Inventor： Yuichi Atarashi ,  Kohei Ota ,  Katsuya Yagi ,  Junji Hashimura ,  Tohru Kimura ,  Katsuya Sakamoto

IPC: G11B7/09 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/135 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/1392

CPC classification number: G11B7/13927 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/1378 ,  G11B2007/0006

Abstract: An optical pickup apparatus comprises a first, second and third light beam sources for emitting first light beams having wavelengths λ1, λ2 and λ3 (λ1

Abstract translation: 光拾取装置包括第一，第二和第三光束源，用于发射分别具有第一，第二和第二记录介质的第一，第二和第三记录介质的具有波长λ1，λ2和λ3（λ1<λ2λ）的第一光束， 具有厚度t1，t2和t3的第三保护层，用于将第一，第二和第三光束会聚到第一，第二和第三记录介质的各个记录表面上的物镜光学透镜，用于使目标移动的跟踪装置 光学透镜，用于改变能够在光轴方向上移动并放置在光路中的光束的发散角的第一发散角度改变元件和用于校正当跟踪装置产生的彗形像差的彗形像差校正元件 移动物镜光学元件。

公开(公告)号：US20050141393A1

公开(公告)日：2005-06-30

申请号：US11017050

申请日：2004-12-21

Applicant: Katsuya Sakamoto

Inventor： Katsuya Sakamoto

IPC: G02B5/18 ,  G02B13/00 ,  G02B13/18 ,  G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135

CPC classification number: G11B7/1367 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pickup apparatus for recording and/or reproducing information on a first optical information recording medium and a second optical information recording medium includes: a first light source emitting a first light flux with a wavelength λ1; a second light source emitting a second light flux with a wavelength λ2; and an objective lens of a finite conjugate type converging the first and second light fluxes. The objective lens has astigmatism for the first light flux, and the direction of occurrence for the astigmatism is the same as the direction in which astigmatism of the first light flux resulting from tracking is reduced. Further, an image height of the objective lens in the direction of tracking is within a prescribed range and astigmatism of the objective lens takes the minimum value.

Abstract translation: 一种用于在第一光学信息记录介质和第二光学信息记录介质上记录和/或再现信息的光学拾取装置包括：发射波长为λ1的第一光通量的第一光源; 发射波长为λ2的第二光束的第二光源; 以及会聚第一和第二光束的有限共轭型物镜。 物镜对于第一光通量具有散光，并且像散的发生方向与由跟踪产生的第一光束的像散减小的方向相同。 此外，物镜在跟踪方向上的图像高度在规定范围内，物镜的像散取最小值。

公开(公告)号：US20050105446A1

公开(公告)日：2005-05-19

申请号：US10987853

申请日：2004-11-12

Applicant: Katsuya Sakamoto ,  Junji Hashimura ,  Kiyono Ikenaka

Inventor： Katsuya Sakamoto ,  Junji Hashimura ,  Kiyono Ikenaka

IPC: G11B7/00

CPC classification number: G11B7/13927 ,  G11B7/1356 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/1398 ,  G11B2007/0006

Abstract: This invention provides an optical pickup apparatus which includes a plurality of light sources, a beam shaping element which is arranged in an optical path through which a light beam emitted from at least one of the light sources passes, and an optical system which includes a divergence angle conversion element and an objective lens and is arranged in an optical path through which the light beams emitted from the plurality of light sources pass, and records and/or reproduces information by condensing, through the objective lens, the light beam emitted from each light source on the information recording surface of a corresponding optical information recording medium. An almost elliptical cross-sectional shape of the light beam which enters the beam shaping element is shaped into a cross-sectional shape closer to an almost circular shape or a circular shape, and the light beam emerges from the beam shaping element. The light beam which enters the divergence angle conversion element emerges from it with a reduced angle or degree of divergence.

Abstract translation: 本发明提供了一种包括多个光源的光学拾取装置，一个光束整形元件，其布置在从至少一个光源发射的光束通过的光路中，以及包括发散的光学系统 角度转换元件和物镜，并且被布置在从多个光源发射的光束通过的光路中，并且通过物镜通过聚光来记录和/或再现从每个光发射的光束的信息 源在相应的光学信息记录介质的信息记录表面上。 进入光束成形元件的光束的近似椭圆形的横截面形状被成形为更接近于几乎圆形或圆形的横截面形状，并且光束从光束成形元件出射。 进入发散角转换元件的光束以减小的角度或发散度出现。

公开(公告)号：US20050007931A1

公开(公告)日：2005-01-13

申请号：US10882617

申请日：2004-07-01

Applicant: Katsuya Sakamoto ,  Kiyoshi Yamashita ,  Kohei Ota ,  Yuichi Atarashi ,  Hidekazu Totsuka

Inventor： Katsuya Sakamoto ,  Kiyoshi Yamashita ,  Kohei Ota ,  Yuichi Atarashi ,  Hidekazu Totsuka

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

CPC classification number: G11B7/1378 ,  G11B7/1275 ,  G11B7/1376 ,  G11B7/1398 ,  G11B2007/0006

Abstract: An optical pickup apparatus having a light source unit including a plurality of light emitting, a beam regulating element to regulate a light flux emitted from the light source unit so that the an angle of divergence of the light flux emitted from the light source unit is changed to a first direction and/or a second direction, wherein a distance from each of the light emitting element to a surface of a protective layer that protects the recording surface is constant regardless a type of the optical information recording medium.

Abstract translation: 一种具有包括多个发光的光源单元的光学拾取装置，用于调节从光源单元发射的光束的光束调节元件，使得从光源单元发射的光束的发散角度改变 到第一方向和/或第二方向，其中从每个发光元件到保护记录表面的保护层的表面的距离是恒定的，而与所述光学信息记录介质的类型无关。

公开(公告)号：US06710939B2

公开(公告)日：2004-03-23

申请号：US10292068

申请日：2002-11-12

Applicant: Katsuya Sakamoto

Inventor： Katsuya Sakamoto

IPC: G02B1304

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

Abstract: An objective lens is provided with plural optical functional regions including an inside optical functional region, an outside optical functional region and an intermediate optical functional region provided between the inside and outside optical functional regions. The absolute value of an amount of a spherical aberration of a light flux coming to the second optical information recording medium after having passed through the intermediate optical functional region is made larger than that of an amount of a spherical aberration of a light flux coming to the second optical information recording medium after having passed through the inside optical functional region when recording and/or reproducing information is conducted for the second optical information recording medium.

Abstract translation: 物镜设置有多个光学功能区域，包括内侧光学功能区域，外部光学功能区域和设置在内部和外部光学功能区域之间的中间光学功能区域。 在通过中间光学功能区域之后到达第二光学信息记录介质的光束的球面像差的量的绝对值被设定为大于来自该光学功能区域的光束的球面像差量的绝对值 当对第二光学信息记录介质进行记录和/或再现信息时，经过内部光学功能区域之后的第二光学信息记录介质。