公开(公告)号：DE60313382D1

公开(公告)日：2007-06-06

申请号：DE60313382

申请日：2003-02-19

Applicant: KONICA MINOLTA OPTO INC

Inventor： TOTSUKA HIDEKAZU ,  SAITO SHINICHIRO ,  SAKAMOTO KATSUYA ,  IKENAKA KIYONO

IPC: G02B13/00 ,  G11B7/135 ,  G02B13/18 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1392

Abstract: An objective optical element for use in an optical pickup apparatus, includes an objective lens to converge the light flux emitted from the first and second light sources; and an optical functional surface including a common region and an exclusive region. When a first optical information medium is used, a sine condition unsatisfied-amount whose value is maximum exists on the common region. The following formula is satisfied: 0.5

公开(公告)号：JP2005222612A

公开(公告)日：2005-08-18

申请号：JP2004029233

申请日：2004-02-05

Applicant: Konica Minolta Opto Inc ,  コニカミノルタオプト株式会社

Inventor： TOTSUKA HIDEKAZU ,  SAKAMOTO KATSUYA ,  MIMORI MITSURU ,  SHIN YUICHI

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

Abstract: PROBLEM TO BE SOLVED: To provide an objective optical element capable of dealing with an optical media having different substrate thicknesses by using a plurality of wavelengths and also capable of dealing with optical media of not only a single layer but also of a multilayer. SOLUTION: The optical element is divided into a plurality of areas. As for a DVD, the absolute value of a spherical aberration SA of the optical element is increased in proportion to separation from an optical axis, and different codes are assigned for every adjacent area. On the other hand, the absolute value of the aberration is made to be equal to or smaller than a specified value by providing an optical path difference imparting structure to an aperture area required for forming an conversion spot on a CD. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种能够通过使用多个波长处理具有不同基板厚度的光学介质的物镜光学元件，并且还能够处理不仅单层的光学介质，而且还可以处理多层 。 解决方案：光学元件被分成多个区域。 对于DVD，光学元件的球面像差SA的绝对值与从光轴的分离成比例地增加，并且对于每个相邻区域分配不同的代码。 另一方面，通过对在CD上形成转换点所需的开口面提供光程差赋予结构，将像差的绝对值设定为等于或小于规定值。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2006114081A

公开(公告)日：2006-04-27

申请号：JP2004297698

申请日：2004-10-12

Applicant: Konica Minolta Opto Inc ,  コニカミノルタオプト株式会社

Inventor： IKENAKA SEINO ,  SHIN YUICHI ,  TOTSUKA HIDEKAZU ,  OTA KOHEI

IPC: G11B7/135 ,  G02B13/00 ,  G02B13/18

CPC classification number: G11B7/1374 ,  G11B2007/0006

Abstract: PROBLEM TO BE SOLVED: To improve a light quantity in a focused spot regarding an objective lens facing an optical recording medium and an optical pickup system provided with the objective lens. SOLUTION: A magnification m 1 of the objective lens 5 to a first laser beam and a magnification m 2 of the objective lens 5 to a second laser beam satisfy 1/30>m 1 ≥0.9×m 2 . An optical surface 6 has a shape of a non-spherical face and is provided with a center area 61 where a first laser beam and a second laser beam are focused and an outer peripheral area 62 where the first laser beam is focused. In the center area 61, a plurality of annular blaze-type first diffraction structures 65 with an optical axis as a center is provided. A first area 63 of the first diffraction structures 65 faces an outer peripheral side and a second area 64 of the same faces an inner peripheral side. The number of apertures NA P1 to the first laser beam passing through only the first area 63 satisfies a following expression 0.35NA C ≤NA P1 ≤0.7NA C or 0.73NA C ≤NA P1 ≤0.95NA C . COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提高关于面向光学记录介质的物镜的聚焦点的光量和设置有物镜的光学拾取系统。 解决方案：物镜5的第一激光束的相对于第二激光束的物镜5的倍率m SB = 1 / SB，物镜5的倍率m SB <2>满足1 / 30>米 1 ≥0.9×m个 2 。 光学面6具有非球面的形状，并且设置有第一激光束和第二激光束聚焦的中心区域61和第一激光束聚焦的外周区域62。 在中心区域61中，设置有以光轴为中心的多个环形闪耀型第一衍射结构65。 第一衍射结构65的第一区域63面向外周侧，第二区域64面向内周侧。 通过仅第一区域63的第一激光束的孔径NA P1 的数量满足以下表达式：0.35NA ≤NA P1 ≤ 0.7NA 或0.73NA ≤NA P1 ≤0.95NA C 。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005317168A

公开(公告)日：2005-11-10

申请号：JP2004203157

申请日：2004-07-09

Applicant: Konica Minolta Opto Inc ,  コニカミノルタオプト株式会社

Inventor： SAKAMOTO KATSUYA ,  TOTSUKA HIDEKAZU ,  SHIN YUICHI ,  OTA KOHEI ,  YAMASHITA KIYOSHI

IPC: G11B7/135

Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup device capable of appropriately performing shaping of a cross-sectional shape of each light flux and conversion of intensity distribution even if a light source unit is used in which a plurality of light emitting points are adjacently provided. SOLUTION: The optical pickup unit 10 is configured with a light source unit 20 in which a plurality of light emitting points emitting lights in different wavelengths are adjacently provided, a beam shaping element 40 for shaping the light flux to have a divergence angle different from that at the incidence, a coupling element 12, and an objective optical element 15 for converging the emitted light flux from the coupling element on a recording face of an optical information recording medium for forming a condensing spot. The distance from each light emitting point to a surface of a protection layer for protecting the recording surface is stabilized irrespective of kinds of the optical information recording medium, and the condensing spot is formed by using a light flux of a long wavelength for the optical information recording medium with a thick protection layer while using a light flux of a short wavelength for the optical information recording medium with a thin protection layer. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 解决的问题：为了提供能够适当地进行各光束的截面形状的成形以及强度分布的变换的光学拾取装置，即使使用多个发光点的光源单元 相邻提供。 光拾取单元10配置有光源单元20，在该光源单元20中相邻地设置发射不同波长的光的多个发光点，用于使光通量成形为具有发散角的光束整形元件40 不同于入射处的耦合元件12，以及用于将来自耦合元件的发射光束会聚在用于形成聚光点的光学信息记录介质的记录面上的物镜光学元件15。 不管光学信息记录介质的种类如何，从每个发光点到用于保护记录表面的保护层的表面的距离都是稳定的，并且通过使用长波长的光束来形成聚光点，用于光学信息 在具有较薄保护层的光学信息记录介质上使用短波长的光束的同时具有厚保护层的记录介质。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005011425A

公开(公告)日：2005-01-13

申请号：JP2003173916

申请日：2003-06-18

Applicant: Konica Minolta Opto Inc ,  コニカミノルタオプト株式会社

Inventor： TOTSUKA HIDEKAZU ,  KOJIMA TOSHIYUKI

IPC: G02B5/18 ,  G02B3/08 ,  G02B13/00 ,  G02B13/18 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To provide an optical element and an optical pickup device, of which the deterioration of an opening limit function in the boundary between the diffractive surface and the refractive surface is suppressed while used for reproducing, etc., and/or recording the information with respect to two kinds of optical information recording media. SOLUTION: This optical element 40 is used for the optical pickup device carrying out reproduction, etc., of the information by using luminous flux of wavelengths λ1 and λ2 with respect to two kinds of the optical information recording media having a protective substrate different in thickness. One optical surface is divided into a center area A1 and a surrounding area A2 covering its circumference, and the center area and the surrounding area are continued through a level difference surface 60 at the boundary. The refractive surface is formed on one area out of the center area and surrounding area, and an optical path difference applying structure 50 is formed on another area for applying the optical path difference on the passing luminous flux. The luminous flux of wavelength λ1 is emitted from the optical element in the state phases of the luminous flux passed through the center area and passed through the surrounding area coincide, and the luminous flux of wavelength λ2 is emitted from the optical element in the phase deviated state. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种光学元件和光学拾取装置，其中在用于再现等的同时抑制了衍射表面和折射表面之间的边界中的开口限制功能的劣化，以及 /或记录关于两种光学信息记录介质的信息。 解决方案：该光学元件40用于相对于具有保护基板的两种光学信息记录介质，通过使用波长λ1和λ2的光束来进行信息的再现等的光学拾取装置 厚度不同。 一个光学表面被分成中心区域A1和覆盖其圆周的周围区域A2，并且中心区域和周围区域在边界处继续通过水平差面60。 折射表面形成在中心区域和周围区域之外的一个区域上，并且在另一个区域上形成光程差施加结构50，以在通过的光通量上施加光程差。 波长λ1的光通量在透过中心区域的光束的状态相中从光学元件发射，并通过周围区域一致，波长λ2的光通量从相位偏离的光学元件发射 州。 版权所有（C）2005，JPO＆NCIPI