公开(公告)号：US20080310284A1

公开(公告)日：2008-12-18

申请号：US12179751

申请日：2008-07-25

Applicant: Kyu TAKADA ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

Inventor： Kyu TAKADA ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G02B3/08 ,  G02B13/003 ,  G02B13/0045 ,  G02B13/0055 ,  G02B13/0065 ,  G11B7/1367 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

Abstract: An optical pickup apparatus includes a diffractive optical element, and an objective lens that focuses a light beam of a first wavelength λ1, a light beam of a second wavelength λ2 and a light beam of a third wavelength λ3 on a first recording medium, a second recording medium, and a third recording medium, respectively, the wavelengths λ1, λ2, and λ3 being different from each other. The diffractive optical element includes a first diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the third wavelength λ3 but diffracts the light beam of the second wavelength λ2, and a second diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the second wavelength λ2 but diffracts the light beam of the third wavelength λ3, and each of the first and second diffractive surfaces satisfies the following condition inequality: Λ/λ≧8 wherein Λ represents the minimum pitch in the case that the width which generates a phase difference of one wavelength when the closest wavefronts resulting from adjacent steps in each of the diffractive surfaces are linked with each other is defined as one pitch, and λ represents the wavelength of the diffracted light.

Abstract translation: 光拾取装置包括衍射光学元件和将第一波长λ1的光束，第二波长λ2的光束和第三波长λ3的光束的光束聚焦在第一记录介质上的物镜，第二 记录介质和第三记录介质，波长λ1，λ2和λ3彼此不同。 衍射光学元件包括：第一衍射面，其既不衍射第一波长λ1的光束也不衍射第三波长λ3的光束，但衍射第二波长λ2的光束;以及第二衍射面，其不衍射光 第一波长λ1的光束和第二波长λ2的光束，但是衍射第三波长λ3的光束，并且第一和第二衍射面中的每一个满足以下条件不等式：<βin-line-formula description = “In-line Formulas”end =“lead”？>λ/λ> = 8 <？in-line-formula description =“In-line Formulas”end =“tail”？>其中Lambda表示该情况下的最小间距 当由每个衍射表面中的相邻步骤产生的最接近的波前相互连接时产生一个波长的相位差的宽度被定义为一个间距，并且λ表示 衍射光的波长。

公开(公告)号：US06922289B2

公开(公告)日：2005-07-26

申请号：US10438135

申请日：2003-05-14

Applicant: Junji Hashimura ,  Kyu Takada

Inventor： Junji Hashimura ,  Kyu Takada

IPC: G02B13/00 ,  G02B3/04 ,  G02B13/18 ,  G11B7/135 ,  G02B21/02

CPC classification number: G11B7/1374 ,  G02B3/04 ,  G11B7/13922

Abstract: An objective lens system for optical pickups reading and/or writing information by condensing a luminous flux from a light source onto an optical information recording medium, consists of, a single lens having, from a light source side, a first surface convex to the light source side and a second surface convex to an image side. A medium of the single lens is a homogeneous medium. At least one of the two surfaces is aspherical. The system satisfies the predetermined conditions.

Abstract translation: 用于光学拾取器的物镜系统通过将来自光源的光通量聚光到光学信息记录介质上来读取和/或写入信息，包括从光源侧具有凸起到光的第一表面的单透镜 源极侧和向图像侧凸出的第二表面。 单透镜的介质是均匀的介质。 两个表面中的至少一个是非球面的。 该系统满足预定条件。

公开(公告)号：US20050063282A1

公开(公告)日：2005-03-24

申请号：US10942460

申请日：2004-09-16

Applicant: Kyu Takada ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

Inventor： Kyu Takada ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

IPC: G02B5/18 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1392

CPC classification number: G11B7/1353 ,  G02B3/08 ,  G02B13/003 ,  G02B13/0045 ,  G02B13/0055 ,  G02B13/0065 ,  G11B7/1367 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

Abstract: An optical pickup apparatus includes a diffractive optical element, and an objective lens that focuses a light beam of a first wavelength λ1, a light beam of a second wavelength λ2 and a light beam of a third wavelength λ3 on a first recording medium, a second recording medium, and a third recording medium, respectively, the wavelengths λ1, λ2, and λ3 being different from each other. The diffractive optical element includes a first diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the third wavelength λ3 but diffracts the light beam of the second wavelength λ2, and a second diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the second wavelength λ2 but diffracts the light beam of the third wavelength λ3, and each of the first and second diffractive surfaces satisfies the following condition inequality: Λ/λ≧8 wherein A represents the minimum pitch in the case that the width which generates a phase difference of one wavelength when the closest wavefronts resulting from adjacent steps in each of the diffractive surfaces are linked with each other is defined as one pitch, and λ represents the wavelength of the diffracted light.

Abstract translation: 光拾取装置包括衍射光学元件和将第一波长λ1的光束，第二波长λ2的光束和第三波长λ3的光束的光束聚焦在第一记录介质上的物镜，第二 记录介质和第三记录介质，波长λ1，λ2和λ3彼此不同。 衍射光学元件包括：第一衍射面，其既不衍射第一波长λ1的光束也不衍射第三波长λ3的光束，但衍射第二波长λ2的光束;以及第二衍射面，其不衍射光 第一波长λ1的光束和第二波长λ2的光束，但衍射第三波长λ3的光束，并且第一和第二衍射面中的每一个满足以下条件不等式：λλ= 8其中A表示 当在每个衍射表面中由相邻步骤产生的最接近的波前相互连接时产生一个波长的相位差的宽度的情况下的最小间距被定义为一个间距，并且λ表示衍射的波长 光。

公开(公告)号：US06624951B2

公开(公告)日：2003-09-23

申请号：US10163333

申请日：2002-06-05

Applicant: Junji Hashimura ,  Kyu Takada ,  Hideki Nagata

Inventor： Junji Hashimura ,  Kyu Takada ,  Hideki Nagata

IPC: G02B1318

CPC classification number: G11B7/1374 ,  G11B2007/13727

Abstract: An objective lens system for optical pickups performing at least one of reading and writing of information by condensing a luminous flux from a light source on an information recording medium, has the following two lens elements from a light source side: a first lens element having a first surface convex to the light source side and a second surface convex to the light source side; and a second lens element having a third surface convex to the light source side and a plane fourth surface, wherein the first surface is an aspherical surface.

Abstract translation: 用于通过将来自光源的光通量聚集在信息记录介质上的读取和写入信息中的至少一个的光学拾取器的物镜系统具有来自光源侧的以下两个透镜元件：第一透镜元件，具有 第一表面凸起到光源侧，第二表面凸起到光源侧; 以及第二透镜元件，其具有对光源侧凸出的第三表面和平面第四表面，其中所述第一表面是非球面。

公开(公告)号：US20090196149A1

公开(公告)日：2009-08-06

申请号：US11663431

申请日：2006-11-06

Applicant: Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

Inventor： Yuichi Atarashi ,  Kohei Ota ,  Junji Hashimura ,  Kiyono Ikenaka

IPC: G11B7/00

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

Abstract: 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.

Abstract translation: 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

Applicant: Kiyono Ikenaka ,  Junji Hashimura

Inventor： Kiyono Ikenaka ,  Junji Hashimura

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

CPC classification number: G11B7/1367 ,  G11B7/127 ,  G11B7/1376 ,  G11B7/13922 ,  G11B2007/0006

Abstract: 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.

Abstract translation: 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：US20050207315A1

公开(公告)日：2005-09-22

申请号：US11080452

申请日：2005-03-16

Applicant: Eiji Nomura ,  Junji Hashimura ,  Tohru Kimura ,  Kazutaka Noguchi

Inventor： Eiji Nomura ,  Junji Hashimura ,  Tohru Kimura ,  Kazutaka Noguchi

IPC: G11B7/00 ,  G11B7/135

CPC classification number: G11B7/13922 ,  G11B7/1367 ,  G11B2007/0006

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06327440B1

公开(公告)日：2001-12-04

申请号：US08896752

申请日：1997-07-18

Applicant: Nobuyuki Taniguchi ,  Hideo Kajita ,  Yujiro Mima ,  Junji Hashimura ,  Nobuya Miki ,  Masayuki Ikemura

Inventor： Nobuyuki Taniguchi ,  Hideo Kajita ,  Yujiro Mima ,  Junji Hashimura ,  Nobuya Miki ,  Masayuki Ikemura

IPC: G03B1700

CPC classification number: G03B1/50

Abstract: A camera capable of taking pictures selectively in a standard or full size frame and a panorama frame having a reduced vertical dimension. This camera includes vertically movable light-shielding members for partly light-shielding an exposure range of the standard frame to set an exposure range of the panorama frame. When the panorama frame is selected, a warning is given on a display provided on the camera body to the effect that a date and other photographic information cannot be recorded on pictures taken in the panorama frame. The shutter of the camera includes an electronic device for detecting an amount of light traveling from a photographic object to which light is flashed. Output of this device is used for suitably controlling exposure for photography in the standard and panorama frames.

Abstract translation: 能够以标准或全尺寸画面选择性地拍摄照片的相机和具有减小的垂直尺寸的全景画面。 该照相机包括可垂直移动的遮光构件，用于对标准框架的曝光范围进行部分遮光以设定全景框架的曝光范围。 当选择全景图像时，在相机机身上提供的显示器上给出警告，使得在全景帧中拍摄的照片上不能记录日期和其他照片信息。 照相机的快门包括用于检测从闪光的照相物体行进的光量的电子设备。 该设备的输出用于适当控制标准和全景图像中的摄影曝光。

公开(公告)号：US06304361B1

公开(公告)日：2001-10-16

申请号：US09608554

申请日：2000-06-30

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G02B2608

CPC classification number: G02B13/0005 ,  G02B26/105

Abstract: A scanning optical system has, from the object side, an object-side lens unit, a mirror, and an image-side lens unit, and scans a object by rotating the mirror while forming an image of the object on a one-dimensional line sensor. Either the object-side lens unit or the image-side lens unit includes at least one aspherical surface that fulfills a defined condition in a range that fulfills a defined condition.

Abstract translation: 扫描光学系统从物体侧具有物体侧透镜单元，反射镜和图像侧透镜单元，并且通过旋转镜来扫描物体，同时在一维线上形成物体的图像 传感器。 物体侧透镜单元或图像侧透镜单元包括在满足限定条件的范围内满足限定条件的至少一个非球面。

公开(公告)号：US5786941A

公开(公告)日：1998-07-28

申请号：US499297

申请日：1995-07-07

Applicant: Minoru Kuwana ,  Hitoshi Hagimori ,  Junji Hashimura

Inventor： Minoru Kuwana ,  Hitoshi Hagimori ,  Junji Hashimura

IPC: G02B7/10 ,  G02B15/14

CPC classification number: G02B7/102

Abstract: A zoom lens system includes a plurality of lens units. First to third focal length zones are set according to the focal length. During focusing, in the first focal length zone, the lens units are moved at a first constant ratio, and in the third focal length zone, the lens units are moved at a second constant ratio which is different from the first constant ratio. In the second focal length zone, the movement ratio of the lens units varies according to the focal length.

Abstract translation: 变焦透镜系统包括多个透镜单元。 根据焦距设置第一至第三焦距区域。 在聚焦期间，在第一焦距区域中，透镜单元以第一恒定比例移动，并且在第三焦距区域中，透镜单元以不同于第一恒定比例的第二恒定比例移动。 在第二焦距区域中，透镜单元的移动比根据焦距而变化。