公开(公告)号：US20090196149A1

公开(公告)日：2009-08-06

申请号：US11663431

申请日：2006-11-06

申请人： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

发明人： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/08517 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925 ,  G11B7/1398 ,  G11B2007/0006 ,  G11B2007/13727

摘要： In order to provide an optical pickup apparatus that has a relatively simple configuration and that can carry out recording and/or reproduction of information in a s compatible manner for different optical information storage medium, the optical surface of the first objective lens OBJ1 is formed only by a refracting surface, and hence it is possible to form it at a low cost even if it is made of glass. In addition, said first objective lens OBJ1 can be designed by optimizing it for the first light flux with the wavelength λ1 and the protective substrate t1 of said first optical disk OD1. On the other hand, while the second objective lens OBJ2 is used commonly for both the first light flux with a wavelength λ1 and the second light flux with a wavelength λ2, when the protective substrate t2 of the second optical disk OD2 and the protective substrate t3 of the third optical disk OD3 are the same, there is no need to consider the difference in the thickness of the protective substrate, and hence the design is easy and it is possible to produce at a low cost.

摘要翻译： 为了提供具有相对简单的配置并且可以以不同的光学信息存储介质的兼容方式进行信息的记录和/或再现的光学拾取装置，第一物镜OBJ1的光学表面仅由 折射表面，因此即使由玻璃制成也可以低成本地形成。 此外，所述第一物镜OBJ1可以通过对具有波长λ1的第一光束和所述第一光盘OD1的保护基板t1进行优化来设计。 另一方面，当第二物镜OBJ2同时用于具有波长λ1的第一光通量和波长λ2的第二光通量时，当第二光盘OD2的保护基板t2和保护基板t3 的第三光盘OD3是相同的，不需要考虑保护性基板的厚度的差异，因此设计容易，并且可以以低成本生产。

公开(公告)号：US20050213472A1

公开(公告)日：2005-09-29

申请号：US11082550

申请日：2005-03-17

申请人： Kiyono Ikenaka ,  Junji Hashimura

发明人： Kiyono Ikenaka ,  Junji Hashimura

IPC分类号： G02B5/18 ,  G02B13/00 ,  G02B13/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/127 ,  G11B7/135 ,  G11B7/1367 ,  G11B7/1376 ,  G11B7/1392

CPC分类号： G11B7/1367 ,  G11B7/127 ,  G11B7/1376 ,  G11B7/13922 ,  G11B2007/0006

摘要： This invention provides an optical element which has an optical surface in which a first light beam having a wavelength λx and a second light beam having a wavelength λy, which are emitted from light sources, become incident, including a diffraction structure in which a plurality of zone portions are formed, the zone portions being arranged in a radial direction about an optical axis and forming one period by a plurality of zones formed into a staircase shape divided by steps in a section including the optical axis, wherein the plurality of zone portions of said diffraction structure include a first zone portion and a second zone portion whose numbers of zones in one period are different, and of the plurality of zones which form one period, the zones except the zone which gives a largest optical path length to the passing second light beam have at least two different widths in a direction perpendicular to the optical axis, and of the plurality of zones which form the zone portion, two zones which are adjacent to each other via a step are designed to give no actual phase difference to the first light beam to pass the first light beam and give a phase difference to the second light beam to generate a diffraction effect, and an optical pickup device having the optical element.

摘要翻译： 本发明提供了一种光学元件，其具有光学表面，其中具有从光源发射的具有波长长度的第一光束和具有波长长度的第二光束入射，包括衍射结构，其中多个 形成区域部分，沿着光轴的径向布置，并且由形成为包括光轴的部分中的台阶形成为阶梯状的多个区域形成一个周期，其中，多个区域部分 所述衍射结构包括第一区域部分和一个周期中的区域数量不同的第二区域部分，以及形成一个周期的多个区域，除了向通过的第二个区域给出最大光程长度的区域之外的区域 光束在垂直于光轴的方向和形成区域por的多个区域中具有至少两个不同的宽度 通过台阶彼此相邻的两个区域被设计成不向第一光束提供实际的相位差以通过第一光束并且给予第二光束的相位差以产生衍射效应，并且 具有光学元件的光学拾取装置。

公开(公告)号：US07668066B2

公开(公告)日：2010-02-23

申请号：US11663299

申请日：2006-11-06

申请人： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

发明人： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical pickup apparatus for information recording and/or reproduction on different optical information recording media with compatibility among these media, the optical surface of a first objective lens and the optical surface of a second objective lens are formed only of a refractive surface. The second objective lens is used in common for the first light flux with a wavelength of λ1 and the second light flux with a wavelength of λ2, but in the case where the protective substrate t2 of the second optical information recording medium and the protective substrate t3 of the third optical information recording medium are the same, it is not necessary to take the difference in thickness of the protective substrate into consideration. Chromatic aberration based on the difference in wavelength between the first light flux and the second light flux can be corrected by displacing the second coupling lens.

摘要翻译： 用于在这些介质之间具有兼容性的不同光学信息记录介质上的信息记录和/或再现的光学拾取装置，第一物镜的光学表面和第二物镜的光学表面仅由折射表面形成。 对于波长为λ1的第一光束和波长为λ2的第二光束，第二物镜共同使用，但是在第二光信息记录介质的保护基板t2和保护基板t3的情况下 第三光信息记录介质的厚度相同时，不需要考虑保护基板的厚度差。 可以通过移动第二耦合透镜来校正基于第一光束和第二光束之间的波长差的色像差。

公开(公告)号：US20060203692A1

公开(公告)日：2006-09-14

申请号：US11366546

申请日：2006-03-03

申请人： Kohei Ota ,  Nobuyoshi Mori ,  Junji Hashimura ,  Tohru Kimura ,  Kiyono Ikenaka ,  Katsuya Sakamoto ,  Eiji Nomura

发明人： Kohei Ota ,  Nobuyoshi Mori ,  Junji Hashimura ,  Tohru Kimura ,  Kiyono Ikenaka ,  Katsuya Sakamoto ,  Eiji Nomura

IPC分类号： G11B7/00

CPC分类号： G11B7/1367 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical unit having a first optical path difference providing structure and a second optical path difference providing structure. Magnifications of the objective optical unit for the first-third light fluxes have almost same value. The first optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be one of under-correction and over-correction for all of the first light flux, the second light flux, and the third light flux. The second optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be the other of under-correction and over-correction of the spherical aberration only for the second light flux.

摘要翻译： 一种光学拾取装置包括：用于发射第一光通量的第一光源; 用于发射第二光通量的第二光源; 用于发射第三光通量的第三光源; 以及具有第一光程差提供结构和第二光程差提供结构的物镜光学单元。 用于第一至第三光束的物镜光学单元的放大率具有几乎相同的值。 第一光程差提供结构提供预定的光程差，并且将球面像差改变为对于所有第一光通量，第二光通量和第三光通量的校正和过校正之一。 第二光程差提供结构提供预定的光程差，并且将球面像差改变为仅用于第二光通量的球面像差的校正不足和过校正。

公开(公告)号：US20050180294A1

公开(公告)日：2005-08-18

申请号：US11049948

申请日：2005-02-04

申请人： Tohru Kimura ,  Nobuyoshi Mori ,  Junji Hashimura ,  Yuichi Atarashi ,  Toshiyuki Kojima ,  Kiyono Ikenaka ,  Mitsuru Mimori

发明人： Tohru Kimura ,  Nobuyoshi Mori ,  Junji Hashimura ,  Yuichi Atarashi ,  Toshiyuki Kojima ,  Kiyono Ikenaka ,  Mitsuru Mimori

IPC分类号： G02B13/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1369 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13922 ,  G11B11/10532 ,  G11B2007/0006

摘要： An optical pickup apparatus comprising: a first, second and third light sources emitting first, second and third light flux having first wavelength of λ1, second wavelength of λ2 and third wavelength of λ3, respectively; and an objective optical system converging the first, second and third light fluxes onto an information recording surface of a first, second and third optical disk, respectively, wherein the objective optical system has a phase structure, and wherein when a first, second and third magnifications of the objective optical system for conducting reproducing information from and/or recording information on the first, second and third optical disks are represented by M1, M2, and M3, respectively, |dM1−M2|, which represents an absolute value of a difference between M1 and M2, satisfies the following relation. |dM1−M2|

摘要翻译： 一种光学拾取装置，包括：第一，第二和第三光源，分别发射具有λ1的第一波长，λ2的第二波长和λ3的第三波长的第一，第二和第三光束; 以及物镜光学系统，其将所述第一，第二和第三光束分别聚焦到第一，第二和第三光盘的信息记录表面上，其中所述物镜光学系统具有相位结构，并且其中当第一，第二和第三光束 用于从第一，第二和第三光盘进行再现信息和/或记录信息的物镜光学系统的放大率分别由M1，M2和M3分别表示为M1，M2和M3。 ，其表示M1和M2之间的差的绝对值，满足以下关系。 <？in-line-formula description =“In-line Formulas”end =“lead”？> | d M1-M2 <0.02 <？in-line-formula description =“In-line 公式“end =”tail“？>

公开(公告)号：US20090196147A1

公开(公告)日：2009-08-06

申请号：US11663299

申请日：2006-11-06

申请人： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

发明人： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925 ,  G11B7/1398 ,  G11B2007/0006

摘要： An optical pickup apparatus for information recording and/or reproduction on different optical information recording media with compatibility among these media, the optical surface of a first objective lens and the optical surface of a second objective lens are formed only of a refractive surface. The second objective lens is used in common for the first light flux with a wavelength of λ1 and the second light flux with a wavelength of λ2, but in the case where the protective substrate t2 of the second optical information recording medium and the protective substrate t3 of the third optical information recording medium are the same, it is not necessary to take the difference in thickness of the protective substrate into consideration. Chromatic aberration based on the difference in wavelength between the first light flux and the second light flux can be corrected by displacing the second coupling lens.

摘要翻译： 用于在这些介质之间具有兼容性的不同光学信息记录介质上的信息记录和/或再现的光学拾取装置，第一物镜的光学表面和第二物镜的光学表面仅由折射表面形成。 第二物镜用于波长为λ1的第一光束和波长为λ2的第二光通量，但是在第二光学信息记录介质和保护基板t3的保护基板t2的情况下 第三光信息记录介质的厚度相同时，不需要考虑保护基板的厚度差。 可以通过移动第二耦合透镜来校正基于第一光束和第二光束之间的波长差的色像差。

公开(公告)号：US07525879B2

公开(公告)日：2009-04-28

申请号：US11076232

申请日：2005-03-10

申请人： Mitsuru Mimori ,  Junji Hashimura ,  Kiyono Ikenaka

发明人： Mitsuru Mimori ,  Junji Hashimura ,  Kiyono Ikenaka

IPC分类号： G11B7/00

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

摘要： An objective optical element for use in an optical pickup apparatus first-third light sources emitting first-third light fluxes and a light converging optical system, includes a first optical path difference providing structure for providing an optical path difference which provides a substantial phase change to the third light flux and does not provide a substantial phase change to the first and second light fluxes; and a second optical path difference providing structure for providing an optical path difference to the first light flux, the second light flux and the third light flux, wherein the objective optical element converges the first-third light fluxes through the protective layers with the thicknesses t1-t3 onto an information recording surface of the first-third optical information media respectively.

摘要翻译： 一种用于光拾取装置的发射第一和第三光束的第一和第三光源的物镜光学元件包括：第一光程差提供结构，用于提供光程差，其提供实质的相位变化 第三光束并且不提供对第一和第二光束的实质相位变化; 以及用于向第一光束，第二光束和第三光束提供光路差的第二光程差提供结构，其中物镜光学元件使第一至第三光束通过保护层会聚，厚度为t1 -t3分别在第一至第三光学信息介质的信息记录表面上。

公开(公告)号：US20050201250A1

公开(公告)日：2005-09-15

申请号：US11076232

申请日：2005-03-10

申请人： Mitsuru Mimori ,  Junji Hashimura ,  Kiyono Ikenaka

发明人： Mitsuru Mimori ,  Junji Hashimura ,  Kiyono Ikenaka

IPC分类号： G02B5/18 ,  G02B13/18 ,  G11B7/00 ,  G11B7/135

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

摘要： An objective optical element for use in an optical pickup apparatus first-third light sources emitting first-third light fluxes and a light converging optical system, includes a first optical path difference providing structure for providing an optical path difference which provides a substantial phase change to the third light flux and does not provide a substantial phase change to the first and second light fluxes; and a second optical path difference providing structure for providing an optical path difference to the first light flux, the second light flux and the third light flux, wherein the objective optical element converges the first-third light fluxes through the protective layers with the thicknesses t1-t3 onto an information recording surface of the first-third optical information media respectively.

摘要翻译： 一种用于光拾取装置的发射第一和第三光束的第一和第三光源的物镜光学元件包括：第一光程差提供结构，用于提供光路差异， 第三光束并且不提供对第一和第二光束的实质相位变化; 以及用于向第一光束，第二光束和第三光束提供光路差的第二光程差提供结构，其中物镜光学元件使第一至第三光束通过保护层会聚，厚度为t1 -t3分别在第一至第三光学信息介质的信息记录表面上。

公开(公告)号：US20050105446A1

公开(公告)日：2005-05-19

申请号：US10987853

申请日：2004-11-12

申请人： Katsuya Sakamoto ,  Junji Hashimura ,  Kiyono Ikenaka

发明人： Katsuya Sakamoto ,  Junji Hashimura ,  Kiyono Ikenaka

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/1356 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/1398 ,  G11B2007/0006

摘要： 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.

摘要翻译： 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：US20050207315A1

公开(公告)日：2005-09-22

申请号：US11080452

申请日：2005-03-16

申请人： Eiji Nomura ,  Junji Hashimura ,  Tohru Kimura ,  Kazutaka Noguchi

发明人： Eiji Nomura ,  Junji Hashimura ,  Tohru Kimura ,  Kazutaka Noguchi

IPC分类号： G11B7/00 ,  G11B7/135

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

摘要： An objective optical system for use in an optical pickup apparatus, comprises an aberration correcting element having at least two phase structures of a first and second phase structures; and a light converging element to converge the first light flux emitted from the aberration correcting element onto an information recording plane of the first optical disk and to converge the second light flux emitted from the aberration correcting element onto an information recording plane of the second optical disk; wherein the second phase structure refrains at least one of a change in the light converging characteristic of the objective optical system due to a change in the wavelength of the first light flux and a change in the light converging characteristic of the objective optical system due to a change in environmental temperature.

摘要翻译： 一种用于光学拾取装置的物镜光学系统，包括具有第一和第二相结构的至少两个相位结构的像差校正元件; 以及聚光元件，用于将从像差校正元件发射的第一光束会聚到第一光盘的信息记录面上，并将从像差校正元件发射的第二光束会聚到第二光盘的信息记录面上 ; 其特征在于，所述第二相位结构由于第一光束的波长的变化和物镜光学系统的会聚特性的变化而导致物镜光学系统的会聚特性的变化中的至少一个， 环境温度变化。