公开(公告)号：US20120155241A1

公开(公告)日：2012-06-21

申请号：US13407405

申请日：2012-02-28

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： G11B7/1353

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：US07961583B2

公开(公告)日：2011-06-14

申请号：US11976061

申请日：2007-10-19

申请人： Norikazu Arai ,  Toshiyuki Kojima ,  Toshihiko Kiriki ,  Kohei Ota ,  Shinichiro Saito

发明人： Norikazu Arai ,  Toshiyuki Kojima ,  Toshihiko Kiriki ,  Kohei Ota ,  Shinichiro Saito

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.

公开(公告)号：US07948856B2

公开(公告)日：2011-05-24

申请号：US11716628

申请日：2007-03-12

申请人： Kohei Ota ,  Kentarou Nakamura

发明人： Kohei Ota ,  Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/13922 ,  G11B7/1374

摘要： A method of manufacturing an optical pickup apparatus, comprising steps of selecting one type objective lens from plural types of objective lenses different in specification of respective optical path difference providing structures in accordance with an oscillation wavelength of a laser light source; and assembling the selected type objective lens and the laser light source into the apparatus.

摘要翻译： 一种制造光学拾取装置的方法，包括以下步骤：根据激光光源的振荡波长从各个光程差提供结构的不同规格的多种物镜中选择一种物镜; 并将所选择的物镜和激光光源组装到设备中。

公开(公告)号：US07843793B2

公开(公告)日：2010-11-30

申请号：US11712959

申请日：2007-03-02

申请人： Kentarou Nakamura ,  Kohei Ota ,  Nobuyoshi Mori ,  Eiji Nomura

发明人： Kentarou Nakamura ,  Kohei Ota ,  Nobuyoshi Mori ,  Eiji Nomura

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G02B3/08 ,  G02B27/42 ,  G02B27/4238 ,  G02B27/4283 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus according to the present invention 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 element. The objective optical element has an optical surface including at least two areas provided with optical path difference providing structures. The objective optical element converges the first to third light fluxes each passing through the predetermined areas on the objective optical element onto respective information recording surfaces of the first to third optical disks. The optical pickup apparatus provides a wavelength dependency of a spherical aberration so as to correct a change in a spherical aberration due to a refractive index change with a temperature change of the objective optical element.

摘要翻译： 根据本发明的光拾取装置包括：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; 和物镜光学元件。 物镜光学元件具有包括设置有光程差提供结构的至少两个区域的光学表面。 物镜光学元件将通过物镜光学元件上的预定区域的第一至第三光束会聚到第一至第三光盘的相应信息记录表面上。 光学拾取装置提供球面像差的波长依赖性，以便校正由于物镜光学元件的温度变化引起的折射率变化引起的球面像差的变化。

公开(公告)号：US07733758B2

公开(公告)日：2010-06-08

申请号：US11716627

申请日：2007-03-12

申请人： Kohei Ota ,  Kentarou Nakamura

发明人： Kohei Ota ,  Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/13922 ,  G11B7/1374

摘要： An objective lens for use in an optical pickup apparatus, comprises an objective lens satisfying the following expression: 0.01≦|δSA3obj/δλ|

摘要翻译： 用于光拾取装置的物镜包括满足以下表达式的物镜：0.01＆nlE; |δSA3obj/δλ| <0.1（λrms/ nm），其中δSA3obj/δλ表示三阶球面像差的波长依赖性 当振荡波长在±2nm之间波动时，物镜。

公开(公告)号：US20090103419A1

公开(公告)日：2009-04-23

申请号：US12297534

申请日：2007-04-17

申请人： Kentarou Nakamura ,  Kohei Ota ,  Jun Egashira

发明人： Kentarou Nakamura ,  Kohei Ota ,  Jun Egashira

IPC分类号： G11B7/00

CPC分类号： G02B3/08 ,  G11B7/1353 ,  G11B2007/0006

摘要： In order to provide an optical pickup device, an objective optical element and an optical information recording and reproducing device that can properly record and/or reproduce information with three different recording densities and that can be realized with a simplified structure and at low cost, the optical pickup device is comprised of an optical element, the construction of which is stacked with first, second and third basic structures to make different optical lengths.

摘要翻译： 为了提供能够以三种不同的记录密度适当地记录和/或再现信息并且可以以简化的结构并且以低成本实现的光学拾取装置，物镜光学元件和光学信息记录和再现装置， 光学拾取装置由光学元件组成，该光学元件的结构与第一，第二和第三基本结构堆叠以形成不同的光学长度。

公开(公告)号：US20080137514A1

公开(公告)日：2008-06-12

申请号：US11976768

申请日：2007-10-26

申请人： Norikazu ARAI ,  Toshiyuki KOJIMA ,  Toshihiko KIRIKI ,  Kohei OTA ,  Shinichiro SAITO

发明人： Norikazu ARAI ,  Toshiyuki KOJIMA ,  Toshihiko KIRIKI ,  Kohei OTA ,  Shinichiro SAITO

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.

公开(公告)号：US20080013433A1

公开(公告)日：2008-01-17

申请号：US11775007

申请日：2007-07-09

申请人： Tohru Kimura ,  Kohei Ota ,  Kiyono Ikenaka

发明人： Tohru Kimura ,  Kohei Ota ,  Kiyono Ikenaka

IPC分类号： G02B13/18

CPC分类号： G02B27/0068 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup apparatus for conducting recording and/or reproducing information for a first optical information recording medium including at least a transparent protective substrate, a first information recording surface, and a second information recording surface which are laminated in this order from a light source side along an optical axis, comprising: a first light source to emit a light flux having a wavelength of λ1 (380 nm≦λ1≦450 nm); an objective lens to converge the light flux onto the first optical information recording medium; a spherical aberration correcting structure to correct a spherical aberration caused in a converged spot on the first and second information recording surfaces due to a difference in thickness between the thickness to the first information recording surface and the thickness to the second information recording surface.

摘要翻译： 一种用于对包括至少透明保护基板，第一信息记录表面和第二信息记录表面的第一光学信息记录介质进行记录和/或再现信息的光学拾取装置，其从光源侧依次层叠 沿着光轴，包括：发射波长为λ1（380nm <λ1= 450nm）的光束的第一光源; 用于将光束会聚到第一光学信息记录介质上的物镜; 球面像差校正结构，用于校正由于第一信息记录表面的厚度与第二信息记录表面的厚度之间的厚度差，在第一和第二信息记录表面上的会聚点引起的球面像差。

公开(公告)号：US20070217316A1

公开(公告)日：2007-09-20

申请号：US11716628

申请日：2007-03-12

申请人： Kohei Ota ,  Kentarou Nakamura

发明人： Kohei Ota ,  Kentarou Nakamura

IPC分类号： G11B7/00

CPC分类号： G11B7/13922 ,  G11B7/1374

摘要： A method of manufacturing an optical pickup apparatus, comprising steps of selecting one type objective lens from plural types of objective lenses different in specification of respective optical path difference providing structures in accordance with an oscillation wavelength of a laser light source; and assembling the selected type objective lens and the laser light source into the apparatus.

摘要翻译： 一种制造光学拾取装置的方法，包括以下步骤：根据激光光源的振荡波长从各个光程差提供结构的不同规格的多种物镜中选择一种物镜; 并将所选择的物镜和激光光源组装到设备中。

公开(公告)号：US20070211609A1

公开(公告)日：2007-09-13

申请号：US11713042

申请日：2007-03-02

申请人： Kentarou Nakamura ,  Kohei Ota ,  Nobuyoshi Mori ,  Eiji Nomura

发明人： Kentarou Nakamura ,  Kohei Ota ,  Nobuyoshi Mori ,  Eiji Nomura

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G02B3/08 ,  G02B27/42 ,  G02B27/4238 ,  G02B27/4283 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus according to the present invention 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 element. The objective optical element has an optical surface including at least two areas provided with optical path difference providing structures. The objective optical element converges the first to third light fluxes each passing through the predetermined areas on the objective optical element onto respective information recording surfaces of the first to third optical disks. One of the optical path difference providing structures includes a first basic structure and a second basic structure which are predetermined optical path difference providing structures and overlap with each other.

摘要翻译： 根据本发明的光拾取装置包括：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; 和物镜光学元件。 物镜光学元件具有包括设置有光程差提供结构的至少两个区域的光学表面。 物镜光学元件将通过物镜光学元件上的预定区域的第一至第三光束会聚到第一至第三光盘的相应信息记录表面上。 光路差分提供结构之一包括第一基本结构和第二基本结构，它们是预定的光程差提供结构并彼此重叠。