公开(公告)号：US07126902B2

公开(公告)日：2006-10-24

申请号：US10223631

申请日：2002-08-20

Applicant: Katsuya Sakamoto ,  Kohei Ota ,  Yuichi Atarashi

Inventor： Katsuya Sakamoto ,  Kohei Ota ,  Yuichi Atarashi

IPC: G11B7/00

CPC classification number: G11B7/13922 ,  G11B7/127 ,  G11B7/1374 ,  G11B2007/0006

Abstract: An objective lens for use in an optical pickup apparatus has a diffractive optical surface. A first light flux having a first wavelength of λ1 is converged as a first number diffraction order diffracted-ray other than the zero-th order diffracted-ray onto an information recording plane of the first optical information recording medium having a thinner protective substrate t1 by the diffractive optical surface and a second light flux having a second wavelength of λ2 (λ1

Abstract translation: 用于光学拾取装置的物镜具有衍射光学表面。 具有λ1的第一波长的第一光束作为除零级衍射光之外的第一数量级衍射级衍射光束会聚在具有较薄保护衬底t的第一光学信息记录介质的信息记录平面上 通过衍射光学表面和具有λ2（λ1λ2）的第二波长的第二光束作为除零级衍射光之外的第二数量衍射级衍射光会聚在信息记录面上 通过衍射光学表面具有较厚保护衬底t 2（t 1

公开(公告)号：US20060140103A1

公开(公告)日：2006-06-29

申请号：US11355220

申请日：2006-02-16

Applicant: Shinichiro Saito ,  Katsuya Sakamoto

Inventor： Shinichiro Saito ,  Katsuya Sakamoto

IPC: G11B7/135 ,  G11B7/00

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：<？in-line-formula description =“In-line Formulas”end =“lead”？> | deltaSA /deltaU|.|deltaU|+|deltaSA < SUB> 2 / deltaT |。| deltaT | <= 0.07 lambdarms <？in-line-formula description =“In-line Formulas”end =“tail”？>其中lambda表示光源的波长， deltaSA＆lt; 1＆gt; / deltaU表示对象到图像间距变化ΔU（| deltaU |≤0.5mm）和deltaSA2 / deltaT表示的球面像差的变化 对于温度变化ΔT（| deltaT | <= 30℃）的球面像差的变化，对象间距离是光源（发光点）和信息记录面之间的距离。

公开(公告)号：US06636365B2

公开(公告)日：2003-10-21

申请号：US09965088

申请日：2001-09-28

Applicant: Shinichiro Saito ,  Katsuya Sakamoto

Inventor： Shinichiro Saito ,  Katsuya Sakamoto

IPC: G02B302

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

Abstract: An optical pickup apparatus for first and second optical information recording medium, comprises first and second light sources to emit first and second light flux; a single objective lens made and a diaphragm having an aperture. The pitch of a plurality of ring-shaped diffractive zones provided on the objective lens, becomes gradually small from the optical axis to a point h and the pitch increases at the point h. At the time of conducting recording or reproducing information of the second optical information recording medium, the second light flux has a spherical aberration discontinuous portion at the point h where a spherical aberration-stepped amount is 7 &mgr;m to 40 &mgr;m, and a spherical aberration of a light ray of the second light flux having passed through the outermost portion of the aperture of the diaphragm is 7 &mgr;m to 40 &mgr;m.

公开(公告)号：US07483358B2

公开(公告)日：2009-01-27

申请号：US12052359

申请日：2008-03-20

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n1，n2和n3分别是当各个光束入射到第一，第二和第三光束时具有波长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 衍射结构分别满足下列公式：<？in-line-formula description =“In-line formula”end =“lead”？> | n1 |> | n2 |，| n1> | n3 | ？在线公式描述=“内联公式”end =“tail”？>混合物镜会聚第一，第二和第三光通量的第n1，第n2和第N3阶衍射光线 分别在第一，第二蚂蚁第三光学信息记录介质的信息记录面上分别形成在相应的规定的必要图像侧数值孔内的适当的波前。

公开(公告)号：US20080074981A1

公开(公告)日：2008-03-27

申请号：US11630945

申请日：2005-06-16

Applicant: Katsuya Sakamoto

Inventor： Katsuya Sakamoto

IPC: G11B7/135 ,  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：US07333416B2

公开(公告)日：2008-02-19

申请号：US11355220

申请日：2006-02-16

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：<？in-line-formula description =“In-line Formulas”end =“lead”？> | deltaSA /deltaU|.|deltaU|+|deltaSA < SUB> 2 / deltaT |。| deltaT | <= 0.07 lambdarms <？in-line-formula description =“In-line Formulas”end =“tail”？>其中lambda表示光源的波长， deltaSA＆lt; 1＆gt; / deltaU表示对象到图像间距变化ΔU（| deltaU |≤0.5mm）和deltaSA2 / deltaT表示的球面像差的变化 对于温度变化ΔT（| deltaT | <= 30℃）的球面像差的变化，对象间距离是光源（发光点）和信息记录面之间的距离。

公开(公告)号：US07158467B2

公开(公告)日：2007-01-02

申请号：US10400655

申请日：2003-03-28

Applicant: Katsuya Sakamoto

Inventor： Katsuya Sakamoto

IPC: G11B7/00

CPC classification number: G11B7/1374 ,  G02B5/1814 ,  G02B27/4238 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pick-up apparatus has a first light source, a second light source, and an optical system including an objective lens. An optical functional surface of the objective lens is divided into at least first and second concentric optical functional regions. The second functional region is provided with a diffractive structure to correct a spherical aberration of a converged light spot on an information recording plane to be regulated in a range where reproduction and/or recording information for a first optical information recording medium can be conducted when the refractive index of the optical element and the wavelength of the first light source vary due to a change of the working temperature of the optical system.

Abstract translation: 光学拾取装置具有第一光源，第二光源和包括物镜的光学系统。 物镜的光学功能表面被分成至少第一和第二同心光学功能区域。 第二功能区域设置有衍射结构，用于校正信息记录面上的会聚光点的球面像差，以在可以进行第一光学信息记录介质的再现和/或记录信息的范围内被调节 光学元件的折射率和第一光源的波长由于光学系统的工作温度的变化而变化。

公开(公告)号：US07102980B2

公开(公告)日：2006-09-05

申请号：US09983682

申请日：2001-10-25

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：<？in-line-formula description =“In-line Formulas”end =“lead”？> | deltaSA /deltaU|.|deltaU|+|deltaSA < SUB> 2 / deltaT |。| deltaT | <= 0.07 lambdarms <？in-line-formula description =“In-line Formulas”end =“tail”？>其中lambda表示光源的波长， deltaSA＆lt; 1＆gt; / deltaU表示对象到图像间距变化ΔU（| deltaU |≤0.5mm）和deltaSA2 / deltaT表示的球面像差的变化 对于温度变化ΔT（| deltaT | <= 30℃）的球面像差的变化，对象间距离是光源（发光点）和信息记录面之间的距离。

公开(公告)号：US07075880B2

公开(公告)日：2006-07-11

申请号：US10144027

申请日：2002-05-14

Applicant: Koji Honda ,  Katsuya Sakamoto ,  Yuichi Atarashi ,  Kohei Ota

Inventor： Koji Honda ,  Katsuya Sakamoto ,  Yuichi Atarashi ,  Kohei Ota

IPC: G11B7/135

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

Abstract: An optical pickup apparatus conducts recording or reproducing information for an information recording plane of a first or second optical information recording medium and comprises a first light source and a second light source mounted on a same base board; a converging optical system; and a coupling lens. The converging optical system comprises an objective lens to converge a first or second light flux having passed through the coupling lens on a first or second optical information recording medium; and a diffractive structure to change a focal length in accordance with a wavelength of a light flux emitted from the first light source or the second light source.

公开(公告)号：US20050249064A1

公开(公告)日：2005-11-10

申请号：US11121087

申请日：2005-05-04

Applicant: Tohru Kimura ,  Katsuya Sakamoto

Inventor： Tohru Kimura ,  Katsuya Sakamoto

IPC: G02B5/18 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/1392

CPC classification number: G11B7/13922 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B2007/0006

Abstract: An optical pick-up apparatus comprising: a first light source emitting a the first light flux; a second light source emitting a second light flux; a third light source emitting a third light flux; and an optical element, wherein the optical element has a first optical surface having a first area including an optical axis of the optical element, and a second area positioned outside the first area, the second area includes a light-shielding structure being capable of substantially shielding the third light flux and being capable of transmitting the first light flux and the second light flux.

Abstract translation: 一种光学拾取装置，包括：发射第一光束的第一光源; 发射第二光束的第二光源; 发射第三光束的第三光源; 以及光学元件，其中所述光学元件具有第一光学表面，所述第一光学表面具有包括所述光学元件的光轴的第一区域和位于所述第一区域外部的第二区域，所述第二区域包括能够基本上 屏蔽第三光束并能够传输第一光通量和第二光通量。