公开(公告)号：US07547868B2

公开(公告)日：2009-06-16

申请号：US12007854

申请日：2008-01-16

Applicant: Kazuhiro Hongo ,  Tetsu Watanabe

Inventor： Kazuhiro Hongo ,  Tetsu Watanabe

IPC: G11B5/02 ,  G11B9/12 ,  G11B11/24 ,  G11B13/08

CPC classification number: G11B5/02 ,  B82Y10/00 ,  B82Y20/00 ,  G11B5/314 ,  G11B7/1387 ,  G11B2005/0005 ,  G11B2005/0021

Abstract: An optical near-field generating apparatus includes a conductive scatterer causing an optical near-field based on a surface plasmon to be generated by being illuminated by incident light, and a conductive body arranged in a vicinity of the scatterer and generating a surface plasmon by being illuminated by the incident light and by being influenced by the surface plasmon of the scatterer. An oscillation direction of the surface plasmon of the conductive body is approximately parallel to an oscillation direction of the surface plasmon of the scatterer, and a generation region of the surface plasmon of the conductive body exists in a position deviated from a region extending in an oscillation direction of the surface plasmon of the scatterer.

Abstract translation: 光学近场产生装置包括导电散射体，其通过被入射光照射而产生基于表面等离子体激元的光学近场;以及导电体，布置在散射体附近并通过以下方式产生表面等离子体： 由入射光照射，受到散射体表面等离子体的影响。 导电体的表面等离子体激元的振荡方向大致平行于散射体的表面等离子体的振荡方向，导电体的表面等离子体的产生区域存在于从摆动延伸的区域偏离的位置 散射体表面等离子体的方向。

公开(公告)号：US06992842B2

公开(公告)日：2006-01-31

申请号：US11103577

申请日：2005-04-12

Applicant: Masahiro Yamada ,  Akira Kouchiyama ,  Tetsu Watanabe

Inventor： Masahiro Yamada ,  Akira Kouchiyama ,  Tetsu Watanabe

IPC: G02B9/00

CPC classification number: G02B6/4214 ,  G02B3/0087 ,  G02B6/262 ,  G02B6/30 ,  G02B6/4203 ,  G02B6/4204 ,  G02B6/4246

Abstract: A first optical device according to the present invention comprises a base made of a first optical material and a second optical material having a refractive index different from that of the first optical material, and the base has a concavity, and the second optical material is filled in this concavity. A second optical device according to the present invention comprises a base made of a first optical material and a second optical material having a refractive index different from the first optical material, and the base comprises first and second faces facing each other, a first concavity is formed in the first face and a second concavity is formed in the second face, and the second optical material is filled in the first and second concavities.

公开(公告)号：US20050180270A1

公开(公告)日：2005-08-18

申请号：US10508260

申请日：2004-01-30

Applicant: Tetsu Watanabe ,  Takakiyo Kanazawa ,  Sunao Aoki ,  Masahiro Yamada

Inventor： Tetsu Watanabe ,  Takakiyo Kanazawa ,  Sunao Aoki ,  Masahiro Yamada

IPC: G11B21/21 ,  G11B7/12 ,  G11B7/121 ,  G11B7/122 ,  G11B7/135 ,  G11B11/105 ,  G11B11/00

CPC classification number: G11B7/121 ,  G11B7/122 ,  G11B11/10554 ,  G11B11/1058

Abstract: The influence of dust is reduced to prevent degradation of the recording and reproduction performances of an optical head apparatus and an information processing apparatus which use a flying slider. The optical head apparatus includes a slider (28) for being flown by an air flow produced by rotation of a disk-type recording medium. Parallel rail elements (28A, 28B) are formed along the direction of the air flow on an opposing face of the slider to the disk-type recording medium. Another rail element (29) is formed in the middle between the two rail elements, and beam light condensed by an objective lens passes through the rail element (29) formed from a transparent material. Even if a foreign particle flows into a gap between the slider and the disk-type recording medium, the optical influence of the foreign particle is less likely to be exerted.

Abstract translation: 减少灰尘的影响，以防止使用飞行滑块的光学头装置和信息处理装置的记录和再现性能的劣化。 光头装置包括用于由盘形记录介质的旋转产生的气流而流动的滑块（28）。 平行轨道元件（28A，28B）沿滑动件的相对面上的空气流动方向形成到盘型记录介质。 另一个轨道元件（29）形成在两个轨道元件之间的中间，并且由物镜聚光的束光通过由透明材料形成的导轨元件（29）。 即使外来颗粒流入滑块和圆盘式记录介质之间的间隙，也不太可能产生外来颗粒的光学影响。

公开(公告)号：US20050157980A1

公开(公告)日：2005-07-21

申请号：US11080426

申请日：2005-03-16

Applicant: Masahiro Yamada ,  Tetsu Watanabe

Inventor： Masahiro Yamada ,  Tetsu Watanabe

IPC: G02B6/024 ,  G02B6/26 ,  G02B6/27 ,  G02B6/36 ,  G02B6/42 ,  H01L31/12

CPC classification number: G11B7/1384 ,  G02B6/262 ,  G02B6/4203 ,  G02B6/4206 ,  G02B6/4208 ,  G02B6/4218

Abstract: An optical pickup using an optical fiber module which includes optical fibers is provided, which can be small-sized and utilize a light beam from a light source at high efficiency. The optical pickup includes: an optical fiber module 20, in which an optical fiber 10 consists of: a first optical fiber 11 which is a field-distribution converting fiber and a second optical fiber 12 whose core has birefringence, both the optical fibers 11 and 12 are connected to each other at one end thereof, and the laser light beam L emitted from the semiconductor laser 1 is made to enter the other end of the first optical fiber 11; an optical head having at least an objective lens; an optical detector; wherein the optical fiber 10 is used as optical wiring to lead the laser light beam L emitted from the semiconductor laser 1 into the optical head.

Abstract translation: 提供一种使用包括光纤的光纤模块的光学拾取器，其可以是小尺寸的并且以高效率利用来自光源的光束。 光拾取器包括：光纤模块20，其中光纤10由以下部分组成：作为场分布转换光纤的第一光纤11和芯具有双折射的第二光纤12，光纤11和 12在其一端彼此连接，从半导体激光器1发射的激光束L进入第一光纤11的另一端; 具有至少一个物镜的光学头; 光学检测器; 其中光纤10用作光线以将从半导体激光器1发射的激光束L引导到光学头中。

公开(公告)号：US06785222B2

公开(公告)日：2004-08-31

申请号：US10040110

申请日：2001-10-29

Applicant: Naohiro Netsu ,  Yoshitaka Aoki ,  Tetsu Watanabe ,  Kazuhiko Fujiie ,  Yasuaki Maeda ,  Takuya Kaeriyama

Inventor： Naohiro Netsu ,  Yoshitaka Aoki ,  Tetsu Watanabe ,  Kazuhiko Fujiie ,  Yasuaki Maeda ,  Takuya Kaeriyama

IPC: G11B2300

CPC classification number: B29C69/001 ,  B29C2793/0009 ,  B29L2017/005 ,  G11B7/007 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/24085 ,  G11B11/10508 ,  G11B11/10582 ,  G11B17/03 ,  G11B23/0035 ,  G11B23/0307 ,  G11B23/0308 ,  G11B23/0317

Abstract: An optical recording medium is provided which has a substrate and a signal recording layer provided on the substrate and in which an information signal is recorded in the form of microscopic pits. A light beam is focused on the signal recording layer and some change of the light beam carried by a return light from the signal recording layer is detected to read the information signal recorded on the signal recording layer. The optical recording medium has a diameter of 65 mm or less and a thickness of 0.4 to 0.7 mm. An information signal recording area extends outwardly from a radial position of 12.5 mm or less from the center of the medium. The ratio in area between the information signal recording area and non-signal recording area is 3.4 or more. The storage capacity of this medium is 2 gigabytes or more. The optical recording medium has formed at the center thereof a center hole around which an annular table-abutment convexing to one side of the medium is formed. A magnetic-clamping hub is installed in the center hole and thus the medium is magnetically clamped to a rotation driving mechanism of an optical recording and/or reproducing apparatus. The compactness and high density of recording of the optical recording medium will contribute greatly to a further compact structure of a recording and/or reproducing apparatus in which the medium is to be used.

Abstract translation: 提供了一种光记录介质，其具有基板和设置在基板上的信号记录层，其中以微观凹坑的形式记录信息信号。 光束聚焦在信号记录层上，并且检测由来自信号记录层的返回光所携带的光束的一些变化，以读取记录在信号记录层上的信息信号。 光记录介质的直径为65mm以下，厚度为0.4〜0.7mm。 信息信号记录区域从介质中心的12.5mm或更小的径向位置向外延伸。 信息信号记录区域与非信号记录区域之间的面积比为3.4以上。 该介质的存储容量为2 GB或更多。 光记录介质在其中心处形成有中心孔，在该中心孔处形成有凸起到介质一侧的环形台面邻接。 磁性夹紧轮毂安装在中心孔中，因此介质被磁力夹紧到光学记录和/或再现装置的旋转驱动机构。 光记录介质的紧凑性和高密度记录对于使用介质的记录和/或再现装置的进一步紧凑结构将有很大的贡献。

公开(公告)号：US06717738B2

公开(公告)日：2004-04-06

申请号：US10148667

申请日：2002-06-03

Applicant: Masahiro Yamada ,  Tetsu Watanabe

Inventor： Masahiro Yamada ,  Tetsu Watanabe

IPC: G02B900

CPC classification number: C03B19/025 ,  C03B11/08 ,  C03B2215/414 ,  C03B2215/48 ,  C03B2215/49 ,  C03B2215/71 ,  C03B2215/72 ,  C03B2215/80 ,  C03C15/00 ,  C03C17/02 ,  C03C17/34 ,  C03C17/3411 ,  C03C2218/328 ,  C03C2218/33 ,  C03C2218/34 ,  G02B3/00 ,  G02B3/12

Abstract: An approximately rectangular parallelopiped shaped optical element 100 has a substrate (base) 101, a lens 102, and an axially symmetric convex portion 103D formed in an upper surface 100U of the substrate 101. The radius of curvature of the surface of this convex portion 103D is approximately constant. The substrate 101 has an axially symmetric concave portion 101B in a bottom surface 100B of the substrate 101. A radius of curvature of the surface of this concave portion 101B is approximately constant. The concave portion 101B is filled with an optical material having a refractive index different from the substrate 101, thereby forming the lens 102. A flat portion 103E is formed around the convex portion 103D. Axes of symmetry of the convex portion 103D and the concave portion 101B are positioned on an identical straight line and are vertical with respect to the flat portions 103E and 101C.

Abstract translation: 近似矩形的平行四面体形状的光学元件100具有形成在基板101的上表面100U中的基板（基座）101，透镜102和轴向对称凸部103D。该凸部103D的表面的曲率半径 大致恒定。 基板101在基板101的底面100B上具有轴向对称的凹部101B。该凹部101B的表面的曲率半径近似恒定。 凹部101B被填充有与基板101不同的折射率的光学材料，从而形成透镜102.平面部分103E围绕凸部103D形成。 凸部103D和凹部101B的对称轴位于相同的直线上并且相对于平坦部103E和101C​​是垂直的。

公开(公告)号：US6075762A

公开(公告)日：2000-06-13

申请号：US76386

申请日：1998-05-12

Applicant: Tetsu Watanabe

Inventor： Tetsu Watanabe

IPC: G11B7/0037 ,  G11B7/12 ,  G11B11/105 ,  G11B7/00

CPC classification number: G11B7/126 ,  G11B11/10595 ,  G11B7/00375 ,  G11B11/10532 ,  G11B7/12

Abstract: An optical pickup is provided with a main beam for performing recording or playback on a disc and an advance beam in a position ahead of this main beam to detect the surface state of the disc; the surface state of the disc is detected on the basis of the light reception information (an MO signal or an RF signal) of this advance beam; and control is so effected that, at the timing of the main beam passing the position where adhesion of dust or the like to the disc is detected, the laser output power of the main beam reach a level at which satisfactory operation can be executed even if there is dust adhesion or the like so as to make possible execution of accurate recording and playback operations, even if the thickness of a disc-shaped recording medium is thinned, without being affected by dust or the like stuck to the surface of the disc-shaped recording medium.

Abstract translation: 光学拾取器设置有用于在盘上的记录或再现的主光束和在该主光束前方的位置的提前光束以检测光盘的表面状态; 基于该提前光束的光接收信息（MO信号或RF信号）检测光盘的表面状态; 并且进行控制，使得在主光束经过检测到灰尘等的附着位置的位置的正时，主光束的激光输出功率达到能够执行令人满意的操作的水平，即使 即使在盘状记录介质的厚度变薄的情况下，灰尘等粘附在盘形记录介质的表面上，也可以进行精确的记录和重放操作， 形记录介质。

公开(公告)号：US6044043A

公开(公告)日：2000-03-28

申请号：US46275

申请日：1998-03-23

Applicant: Yoshitaka Aoki ,  Tetsu Watanabe

Inventor： Yoshitaka Aoki ,  Tetsu Watanabe

IPC: G11B11/10 ,  G11B7/095 ,  G11B11/105 ,  G11B11/00

CPC classification number: G11B11/10595 ,  G11B11/1055 ,  G11B11/1058 ,  G11B7/0956

Abstract: A head unit is provided which is able to satisfactorily record/reproduce an information signal to and from a disk even if the disk can considerably be inclined (deflected) by a load applied by the head. The load applied from the magnetic head to the disk is set to be not larger than an upper limit which is calculated in accordance with a permissible range for incident angles of laser beams emitted from the optical head to the disc-shape recording medium, the thickness of the disc-shape recording medium and the radius of the disc-shape recording medium. As an alternative to this, the load is set to be not larger than an upper limit calculated in accordance with a permissible range of the amount of deviation between the point to which laser beams emitted from the optical head to the disc-shape recording medium and a point to which laser beams are converged, the thickness of the disc-shape recording medium and the radius of the disc-shape recording medium.

Abstract translation: 提供了一种头部单元，其能够令人满意地将信息信号记录/再现到盘中，即使盘可以由头施加的负载相当大地倾斜（偏转）。 从磁头施加到盘的载荷被设定为不大于根据从光头到盘形记录介质发射的激光束的入射角的允许范围计算的上限， 的圆盘形记录介质的半径。 作为替代，负载被设定为不大于根据从光头到盘形记录介质发射的激光束的点之间的偏移量的允许范围的计算的上限和 激光束会聚的点，盘形记录介质的厚度和盘形记录介质的半径。

公开(公告)号：US5592465A

公开(公告)日：1997-01-07

申请号：US348751

申请日：1994-12-02

Applicant: Tamotsu Yamagami ,  Tetsu Watanabe ,  Yoichiro Sako

Inventor： Tamotsu Yamagami ,  Tetsu Watanabe ,  Yoichiro Sako

IPC: G11B7/00 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B20/18 ,  G11B23/36 ,  G11B27/19 ,  G11B27/30 ,  G11B7/24

CPC classification number: G11B7/0037 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10595 ,  G11B20/10009 ,  G11B20/10027 ,  G11B20/10222 ,  G11B20/1258 ,  G11B20/1403 ,  G11B20/1816 ,  G11B27/19 ,  G11B27/3027 ,  G11B7/00745 ,  G11B7/0938 ,  G11B2220/20 ,  G11B2220/2525

Abstract: In a disc recording method in which a disc on which servo control data is recorded in advance in alignment with a radial direction is divided into a plurality of zones in the radial direction and digital data having different clock rates are recorded on every zone, reference data for detecting the quality of a recording signal is recorded on a whole recording data area of one segment segmented by at least said servo control data. Therefore, the reproduction of data recorded in the zone-recording fashion can be controlled with ease in any zone.

Abstract translation: 在其中预先将伺服控制数据与径向对准地记录在其上的盘被记录在径向方向上的多个区域中，并且在每个区域上记录具有不同时钟速率的数字数据的参考数据 用于检测记录信号的质量的数据被记录在由至少所述伺服控制数据分段的一个段的整个记录​​数据区域上。 因此，可以容易地在任何区域中控制以区域记录方式记录的数据的再现。

公开(公告)号：US5559774A

公开(公告)日：1996-09-24

申请号：US795724

申请日：1991-11-21

Applicant: Tetsu Watanabe ,  Tamotsu Yamagami ,  Yoshiyuki Urakawa

Inventor： Tetsu Watanabe ,  Tamotsu Yamagami ,  Yoshiyuki Urakawa

IPC: G11B7/005 ,  G11B20/10 ,  G11B5/09

CPC classification number: G11B7/005 ,  G11B20/10009

Abstract: An apparatus reproducing signals recorded on an optical disc rotated at a constant angular velocity. The apparatus employs a binary detector for forming digital data by comparing the reproduced signal with a predetermined threshold level, and a ternary detector for forming reproduced data from two series of digital data detected by comparing the reproduced signal with two different threshold levels of predetermined values. The reproduced data from an outer portion of the disc is detected by the binary detector, while the reproduced data from an inner portion of the disc is detected by the ternary detector. The playback output is selectively switched in response to an address signal of a specific track where the phase margin of the reproduced data detected by the binary detector and the phase margin of the reproduced data detected by the ternary detector becomes substantially equal to each other.

Abstract translation: 记录在以恒定角速度旋转的光盘上的信号的装置。 该装置采用二进制检测器，用于通过将再现信号与预定阈值电平进行比较来形成数字数据;以及三进制检测器，用于通过将再现信号与预定值的两个不同阈值电平进行比较而检测的两个数字数据序列形成再现数据。 来自盘的外部的再现数据由二进制检测器检测，而来自盘的内部的再现数据由三元检测器检测。 响应于由二进制检测器检测到的再现数据的相位裕度和由三元检测器检测到的再现数据的相位裕度彼此基本相等的特定轨道的地址信号来选择性地切换回放输出。