公开(公告)号：US06671247B1

公开(公告)日：2003-12-30

申请号：US09712231

申请日：2000-11-15

申请人： Norikazu Arai ,  Toshiyuki Kojima ,  Kohei Ota

发明人： Norikazu Arai ,  Toshiyuki Kojima ,  Kohei Ota

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/127 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical pickup apparatus for a first optical medium including a first transparent base plate having a thickness of t1 and a second optical medium including a second transparent base plate having a thickness of t2 (t2>t1), comprises a first light source to emit a first light flux having a wavelength of &lgr;1; a second light source to emit a second light flux having a wavelength of &lgr;2 (&lgr;1

摘要翻译： 一种用于第一光学介质的光学拾取装置，包括厚度为t1的第一透明基板和包括厚度为t2（t2> t1）的第二透明基板的第二光学介质，包括：第一光源， 具有波长λ1的第一光通量; 用于发射波长为λ2（λ1

公开(公告)号：US06919996B2

公开(公告)日：2005-07-19

申请号：US10642199

申请日：2003-08-18

申请人： Kazuhiro Wada ,  Hiroyuki Hattori ,  Yayol Eguro ,  Norikazu Arai ,  Koji Honda ,  Yuichi Honda ,  Yuichi Atarashi

发明人： Kazuhiro Wada ,  Hiroyuki Hattori ,  Yayol Eguro ,  Norikazu Arai ,  Koji Honda ,  Yuichi Honda ,  Yuichi Atarashi

IPC分类号： G02B3/02 ,  G02B7/02 ,  G11B7/00

CPC分类号： G11B7/1374 ,  G02B7/022 ,  G11B2007/13727

摘要： An objective lens for use in an optical pickup apparatus, comprises a first lens molded with a plastic and having an optically functional section, flange section provided around the periphery of the optically functional section, and a first contacting section provided on the flange section; and a second lens molded with a plastic, located opposite to the first lens and having an optically functional section, a flange section provided around the periphery of the optically functional section, and a second contacting section provided on the flange section. The first lens and the second lens are joined in such a way that the first contacting section and the second contacting section are brought in contact with each other.

摘要翻译： 一种用于光学拾取装置的物镜，包括用塑料模制并具有光学功能部分的第一透镜，设置在光学功能部分周围的凸缘部分和设置在凸缘部分上的第一接触部分; 以及与所述第一透镜相对设置并且具有光学功能部分的塑料模制的第二透镜，设置在所述光学功能部分周围的凸缘部分和设置在所述凸缘部分上的第二接触部分。 第一透镜和第二透镜以使得第一接触部和第二接触部彼此接触的方式接合。

公开(公告)号：US06765732B2

公开(公告)日：2004-07-20

申请号：US10206187

申请日：2002-07-29

申请人： Shogo Yamamoto ,  Hiroyuki Hattori ,  Etsuzo Kurihara ,  Shinichiro Saito ,  Takashi Matsumaru ,  Taichiro Saito ,  Kazuo Ishida ,  Yuichi Atarashi ,  Norikazu Arai

发明人： Shogo Yamamoto ,  Hiroyuki Hattori ,  Etsuzo Kurihara ,  Shinichiro Saito ,  Takashi Matsumaru ,  Taichiro Saito ,  Kazuo Ishida ,  Yuichi Atarashi ,  Norikazu Arai

IPC分类号： G02B302

CPC分类号： G11B7/1374 ,  B29C45/27 ,  B29D11/00009 ,  B29D11/00432 ,  B29L2011/0016 ,  C03B11/08 ,  C03B2215/404 ,  C03B2215/49 ,  G02B3/04 ,  G11B7/22 ,  G11B11/10543 ,  Y02P40/57

摘要： An objective lens for use in an optical pickup apparatus for conducting recording and/or reproducing information for an optical information recording medium, has a lens section shaped in an approximate circle and including a flange section; and a connecting section integrally provided to the lens section. The objective lens satisfies the following conditional formulas: 0.5≦A≦2.0, 0.3A≦B≦1.7A where A is a diameter of the lens section when the lens section is viewed from an direction of an optical axis, and B is a width of the connecting section when the connecting section is viewed from the direction of the optical axis.

摘要翻译： 用于对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中的物镜具有近似圆形且包括凸缘部分的透镜部分; 以及与透镜部一体地设置的连接部。 该物镜满足以下条件式：其中，A是从光轴方向观察透镜部时的透镜部的直径，B是从连接部从方向观察时的连接部的宽度 的光轴。

公开(公告)号：US4902114A

公开(公告)日：1990-02-20

申请号：US226378

申请日：1988-07-29

申请人： Norikazu Arai

发明人： Norikazu Arai

IPC分类号： G02B13/00 ,  G02B13/18 ,  G02B13/24 ,  G11B7/135

CPC分类号： G02B13/24

摘要： In an objective lens for an optical disk of the type in which focussing is carried out by moving a unit of the entire optical system including a light source and an objective lens, variation of the numerical apertures and deterioration in performance for the focussing are not present, but it is important for reducing the weight of the unit as light as possible to minimize the distance from a light source to an information recording surface while securing an operating distance as required. The lens for that purpose is an aspherical single lens, but it is necessary, for an aspherical shape less affected by a high-order term to be easily fabricated, to make a surface on the light source side an aspherical surface, of which conical coefficient is within a predetermined range.

摘要翻译： 在通过移动包括光源和物镜的整个光学系统的单元进行聚焦的类型的光盘的物镜中，不存在数值孔径的变化和用于聚焦的性能的劣化 但是，尽可能地减小单元的重量对于将光源到信息记录表面的距离最小化，同时确保所需的操作距离是重要的。 用于该目的的透镜是非球面单透镜，但是对于容易制造较少受高阶项影响的非球面形状，必须使光源侧的表面成为非球面的圆锥形系数 在预定范围内。

公开(公告)号：US4484803A

公开(公告)日：1984-11-27

申请号：US443238

申请日：1982-11-22

申请人： Norikazu Arai

发明人： Norikazu Arai

IPC分类号： G02B13/00 ,  G02B13/24 ,  G02B21/02 ,  G02B9/06

CPC分类号： G02B21/02 ,  G02B13/24

摘要： This invention relates to an objective lens for regenerating a video disc or the like. A semiconductor laser is used as a light source to directly drive an objective lens for carrying out tracking, and thus the lens must be small and light-weight, but the aberration on the optical axis could well be corrected. However, because of small-size of lens, a manufacture error such as eccentricity is greatly affected. A positive meniscus lens on the image side is approximated to a concentric configuration by an objective lens comprising two lenses whereby the influence resulting from eccentricity may be minimized.

摘要翻译： 本发明涉及用于再生视频盘等的物镜。 使用半导体激光器作为光源来直接驱动用于进行跟踪的物镜，因此透镜必须小而重量轻，但是可以很好地校正光轴上的像差。 然而，由于镜片尺寸小，偏心等制造误差受到很大影响。 图像侧的正弯月形透镜由包括两个透镜的物镜近似为同心构造，由此偏心引起的影响可以最小化。

公开(公告)号：US07327663B2

公开(公告)日：2008-02-05

申请号：US10420911

申请日：2003-04-23

申请人： Tohru Kimura ,  Norikazu Arai

发明人： Tohru Kimura ,  Norikazu Arai

IPC分类号： G11B7/00

CPC分类号： G11B7/1376 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A recording reproducing optical system for an optical information recording medium is provided with a light source; an objective lens; and an aberration correcting optical element provided on an optical path between the light source and the objective lens. The objective lens includes an aspherical surface and one diffractive surface on which a diffractive structure structured by a plurality of concentric ring-shaped zonal steps is formed and the objective lens is a plastic lens structured in one element in one group. The aberration correcting optical element comprises at least one plastic lens on which a diffractive structure structured by a plurality of concentric ring-shaped zonal steps is formed. The following formulas are satisfied: PD1>0 (PD1 is a diffractive power (mm−1)), PD2 0 (PR2 is a refractive power (mm−1) as a refractive lens).

摘要翻译： 一种用于光学信息记录介质的记录再现光学系统设置有光源; 物镜; 以及设置在光源和物镜之间的光路上的像差校正光学元件。 物镜包括非球面和一个衍射表面，其上形成有由多个同心环形区带台阶构成的衍射结构，并且物镜是以一个组件中的一个元件构成的塑料透镜。 像差校正光学元件包括至少一个塑料透镜，在其上形成由多个同心环状带状台阶构成的衍射结构。 满足下列公式：PD 1> 0（PD 1是衍射功率（mm -1）），PD 2 <0（PD 2是衍射功率（mm < / SUP>））和PR 2> 0（PR 2是作为折射透镜的折射光焦度（mm ^-1））。

公开(公告)号：US20050018297A1

公开(公告)日：2005-01-27

申请号：US10886625

申请日：2004-07-09

申请人： Tatsuo Ohta ,  Norikazu Arai ,  Shin-ichiro Saito

发明人： Tatsuo Ohta ,  Norikazu Arai ,  Shin-ichiro Saito

IPC分类号： G02B27/00 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G02B5/18 ,  G02B27/44

CPC分类号： G11B7/1367 ,  G02B5/1895 ,  G02B27/0037 ,  G02B27/4238 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B2007/0006

摘要： This invention provides an optical component which can keep the light transmittance high while ensuring good wiping resistance characteristics, and can also realize intended optical characteristics based on a fine structure, and an optical pickup apparatus including the optical component. An optical component according to this invention includes a first optical surface on which a fine structure is formed and a second optical surface on which no fine structure is formed. The number of layers of an antireflection film on the first optical surface is set to be smaller than the number of layers of an antireflection film on the second optical surface.

摘要翻译： 本发明提供一种可以保持良好的耐擦拭性特性而保持透光性高的光学部件，并且还可以实现基于精细结构的预期光学特性，以及包括该光学部件的光学拾取装置。 根据本发明的光学部件包括其上形成微细结构的第一光学表面和不形成细微结构的第二光学表面。 将第一光学面上的防反射膜的层数设定为小于第二光学面上的防反射膜的层数。

公开(公告)号：US06400672B2

公开(公告)日：2002-06-04

申请号：US09798965

申请日：2001-03-06

申请人： Norikazu Arai ,  Hiroyuki Yamazaki ,  Shinichiro Saito

发明人： Norikazu Arai ,  Hiroyuki Yamazaki ,  Shinichiro Saito

IPC分类号： G11B712

CPC分类号： G11B7/1275 ,  G02B3/10 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1381 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical pickup apparatus includes a light source for emitting a light flux; and a converging optical system having a first, second, and third divided surface, which are divided in the order named from the vicinity of an optical axis of the converging optical system, for converging the light flux emitted from the light source, wherein a beam spot passing through the first and third divided surfaces is formed onto a first optical information recording medium having a transparent substrate whose thickness is t1, and a beam spot passing through the first and second surfaces is formed onto a second optical information recording medium having a transparent substrate whose thickness is t2 that is more than t1. The optical pickup apparatus further includes an image sensor for receiving a light flux reflected from the first and/or second optical information recording medium.

摘要翻译： 光拾取装置包括用于发射光束的光源; 以及会聚光学系统，其具有从会聚光学系统的光轴附近按顺序划分的第一，第二和第三分割表面，用于会聚从光源发射的光束，其中光束 通过第一和第三分割表面的光斑形成在具有厚度为t1的透明基板的第一光学信息记录介质上，并且穿过第一和第二表面的光束点形成在具有透明的第二光学信息记录介质上 基板的厚度t2大于t1。 光学拾取装置还包括用于接收从第一和/或第二光学信息记录介质反射的光束的图像传感器。

公开(公告)号：US06243349B1

公开(公告)日：2001-06-05

申请号：US09624342

申请日：2000-07-24

申请人： Norikazu Arai ,  Hiroyuki Yamazaki ,  Shinichiro Saito

发明人： Norikazu Arai ,  Hiroyuki Yamazaki ,  Shinichiro Saito

IPC分类号： G11B712

CPC分类号： G11B7/1275 ,  G02B3/10 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1381 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical pickup apparatus includes a light source for emitting a light flux; and a converging optical system having a first, second, and third divided surface, which are divided in the order named from the vicinity of an optical axis of the converging optical system, for converging the light flux emitted from the light source, wherein a beam spot passing through the first and third divided surfaces is formed onto a first optical information recording medium having a transparent substrate whose thickness is t1, and a beam spot passing through the first and second surfaces is formed onto a second optical information recording medium having a transparent substrate whose thickness is t2 that is more than t1. The optical pickup apparatus further includes an image sensor for receiving a light flux reflected from the first and/or second optical information recording-medium.

摘要翻译： 光拾取装置包括用于发射光束的光源; 以及会聚光学系统，其具有从会聚光学系统的光轴附近按顺序划分的第一，第二和第三分割表面，用于会聚从光源发射的光束，其中光束 通过第一和第三分割表面的光斑形成在具有厚度为t1的透明基板的第一光学信息记录介质上，并且穿过第一和第二表面的光束点形成在具有透明的第二光学信息记录介质上 基板的厚度t2大于t1。 光学拾取装置还包括用于接收从第一和/或第二光学信息记录介质反射的光束的图像传感器。

公开(公告)号：USRE34455E

公开(公告)日：1993-11-23

申请号：US277469

申请日：1988-11-23

申请人： Norikazu Arai ,  Shozo Ishiyama ,  Tadashi Kojima

发明人： Norikazu Arai ,  Shozo Ishiyama ,  Tadashi Kojima

IPC分类号： G02B13/18 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G02B13/18

摘要： A large-aperture single lens with aspherical surfaces to be used as a pickup lens for video disks, especially for tracking the video disk by directly moving the pickup lens. It is preferable that the single lens is made of plastic material in order to make it compact and light in weight. Both refractive surfaces of the single lens are arranged to have positive refractive powers in order to make the working distance of the lens long. Spherical aberration of the single lens is corrected to the degree that the diameter of the circle of confusion thereof is decided approximately by diffraction of light. Both refractive surfaces of the single lens are formed as aspherical surfaces and the shapes of the refractive surfaces are determined so as to correct aberrations including the sine condition to the required range, by taking the error to be caused at the time of manufacture into consideration.