公开(公告)号：US5146445A

公开(公告)日：1992-09-08

申请号：US559912

申请日：1990-07-30

申请人： Tohru Nakamura ,  Hideki Aikoh ,  Masayuki Shinoda ,  Noboru Kikuchi

发明人： Tohru Nakamura ,  Hideki Aikoh ,  Masayuki Shinoda ,  Noboru Kikuchi

IPC分类号： G11B7/09 ,  G11B7/13

CPC分类号： G11B7/133 ,  G11B7/0901 ,  G11B7/094

摘要： An optical head equipped with a tracking error detector to obtain a tracking error signal for tracking servo. The detector includes a photodetector having a light-detecting region on which a light spot with a predetermined diameter is formed by a reflected light beam from a recording medium. The region is divided by a first division line into two which are further divided by second and third division lines so as to form first to fourth subregions, the first and second subregions being adjacent to each other with the first division line being interposed therebetween, the third subregion being adjacent to the first subregion, and the fourth subregion being adjacent to the second subregion. The separation between the second and third division lines is determined so that the sum of the light receiving quantities of the first and fourth subregions is substantially equal to the sum of the light receiving quantities of the second and third subregions when the objective lens is shifted from its neutral position. Electric signals produced in correspondance with the light receiving quantities are supplied to a differential amplifier to take a difference between a sum signal of the signals due to the first and fourth subregions and a sum signal of the signals due to the second and third subregions.

公开(公告)号：US5150350A

公开(公告)日：1992-09-22

申请号：US403446

申请日：1989-09-06

申请人： Hideki Aikoh ,  Tohru Nakamura ,  Masayuki Shinoda ,  Noboru Kikuchi

发明人： Hideki Aikoh ,  Tohru Nakamura ,  Masayuki Shinoda ,  Noboru Kikuchi

IPC分类号： G11B11/10 ,  G11B7/09 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1356 ,  G11B11/10576 ,  G11B7/0901 ,  G11B7/1359

摘要： A magneto-optical data recording and reproducing device for storing data in a data memory medium which applies modulation to a plane of polarization, erasing data therefrom and reproducing data stored therein, comprises a light source for emitting a light beam with linear polarization, a light spot forming means for condensing the light beam emitted from the light source and forming a light spot on the data memory medium, a beam splitting means, located between the light source and the light spot forming means, to which reflected light beams from the data memory medium are applied and splitted, a beam detecting prism, to which light beams splitted by the beam splitting means are applied, providing the polarizing function that a predetermined first pencil of light beam with linear polarization is reflected while a second pencil of light beam with linear polarization crossing the first pencil at right angles is transmitted, a beam splitting prism, being located near or adhered to the beam detecting prism, for splitting the second pencil of light beam with linear polarization transmitted through the beam detecting prism into two subpencils with approximately the same quantity of light, reflecting the splitted subpencils and then re-allying them to the beam detecting prism to form two optical axes extending along approximately the same direction as that of the first pencil of light beam with linear polarization, at least one or more photo detector to which a plurality of light beams having passed through the beam detecting prism and the beam splitting prism are applied, a data retrieval unit for retrieving data in the data memory medium according to output of the photo detector, a tracking servo unit to which a tracking error signal picked up by the output of the beam detector is applied, and a driving means for driving at least the light spot forming means in response to an output signal from the tracking servo unit.

公开(公告)号：US5126563A

公开(公告)日：1992-06-30

申请号：US620719

申请日：1990-12-03

申请人： Hideki Aikoh ,  Masayuki Shinoda ,  Tohru Nakamura

发明人： Hideki Aikoh ,  Masayuki Shinoda ,  Tohru Nakamura

IPC分类号： G11B11/10 ,  G11B7/085 ,  G11B7/09 ,  G11B7/12 ,  G11B11/105

CPC分类号： G11B7/08582 ,  G11B7/12

摘要： In an optical reading-writing apparatus, moving unit (14) has only a mirror (21) for reflecting a horizontal laser beam in vertical direction, an objective lens (22) for converting the laser beam on a recording face of an optical disc (11) and an objective lens driving device (23), and the moving unit (14) is slidably driven in radial direction by a moving unit driving device (24) and the other optical elements such as a semiconductor laser (15), a collimator lens (16), a mirror (17), a beam splitter (18), a photo-sensor (19) and a signal detecting device (20) are fixed on a base member (13).

摘要翻译： 在光学读写装置中，移动单元（14）仅具有用于在垂直方向上反射水平激光束的反射镜（21），用于将激光束转换到光盘的记录面上的物镜（22） 11）和物镜驱动装置（23），并且移动单元（14）通过移动单元驱动装置（24）沿径向可滑动地驱动，并且其他光学元件如半导体激光器（15），准直器 透镜（16），反射镜（17），分束器（18），光电传感器（19）和信号检测装置（20）固定在基座部件（13）上。

公开(公告)号：US07158469B2

公开(公告)日：2007-01-02

申请号：US10502662

申请日：2003-05-06

申请人： Hideki Aikoh ,  Tohru Nakamura ,  Hideki Nakata

发明人： Hideki Aikoh ,  Tohru Nakamura ,  Hideki Nakata

IPC分类号： G11B7/00

CPC分类号： G11B7/22 ,  G11B7/123 ,  G11B7/13 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2924/00014

摘要： The present invention realizes a compact and thin light-receiving device in a simple configuration, and provides a compact optical head on which this light-receiving device is mounted. The light-receiving device for receiving light reflected from an information recording medium includes a light-receiving chip having a plurality of electrodes and a flexible wiring board on which the light-receiving chip is mounted and fixed. The plurality of electrodes are connected electrically to the flexible wiring board by attaching directly or via a metal wire.

摘要翻译： 本发明以简单的结构实现了一种紧凑且薄型的光接收装置，并且提供了一种紧凑的光头，该光接收装置安装在该光头上。 用于接收从信息记录介质反射的光的光接收装置包括具有多个电极的光接收芯片和安装并固定光接收芯片的柔性布线板。 多个电极通过直接或经由金属线附接而与柔性布线板电连接。

公开(公告)号：US20060198256A1

公开(公告)日：2006-09-07

申请号：US10553797

申请日：2004-12-02

申请人： Takuya Wada ,  Tohru Nakamura ,  Hideki Aikoh ,  Takao Hayashi ,  Osamu Mizuno

发明人： Takuya Wada ,  Tohru Nakamura ,  Hideki Aikoh ,  Takao Hayashi ,  Osamu Mizuno

IPC分类号： G11B7/00

CPC分类号： G11B7/0946 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/121 ,  G11B2007/0006

摘要： A collision preventive member that limits displacements of an objective lens in a focusing direction is provided. The collision preventive member includes a first limiting portion that limits displacements of the objective lens present within a first region while allowing a movable range of the objective lens in the focusing direction to overlap a deflection range of the optical disc within the first region, and a second limiting portion that limits displacements of the objective lens present within a second region in establishing a relation such that the movable range of the objective lens in the focusing direction does not overlap the deflection range of the optical disc within the second region. A controller that controls the objective lens in such a manner that the objective lens is located within the second region in a non-focusing state of the objective lens is provided. It is thus possible to prevent a collision between an optical disc and the objective lens under the environment where vibrations are applied.

摘要翻译： 提供了一种限制物镜在聚焦方向上的位移的防撞构件。 防撞构件包括第一限制部分，其限制存在于第一区域内的物镜的位移，同时允许物镜在聚焦方向上的可移动范围与第一区域内的光盘的偏转范围重叠， 第二限制部分限制存在于第二区域内的物镜的位移，以建立关系，使得物镜在聚焦方向上的可移动范围不与第二区域内的光盘的偏转范围重叠。 提供了一种以物镜位于物镜的非聚焦状态的第二区域内的方式控制物镜的控制器。 因此，可以在施加振动的环境下防止光盘与物镜之间的碰撞。

公开(公告)号：US20060090207A1

公开(公告)日：2006-04-27

申请号：US10535194

申请日：2003-11-17

申请人： Hironori Tomita ,  Tohru Nakamura ,  Hideki Aikoh

发明人： Hironori Tomita ,  Tohru Nakamura ,  Hideki Aikoh

IPC分类号： H04N7/16

CPC分类号： G06Q30/06 ,  G06F21/10

摘要： This invention relates to a content distribution system, a content distribution method and a content receiving device and one of the objects thereof are to enable a higher investment efficiency regarding content of manufacturers. In order to achieve the object, the content distribution system includes a content receiving device (21A, 22A, 23A) for receiving and reproducing encrypted content created by using a budget provided by manufacturer, the content receiving device (21A, 22A, 23A) comprising a receiving means 91 for receiving the content, an input means (93) for inputting a decryption key given owing to purchase of a product made by the manufacturer, a decryption means (96) for decrypting, upon input of the decryption key by the input means (93), an encryption of the content received by the receiving means (93) by use of the decryption key; and a viewing means (92) for reproducing the content decrypted by the decryption means (96).

摘要翻译： 本发明涉及一种内容分发系统，内容分发方法和内容接收装置，其目的之一是能够提高关于制造商内容的投资效率。 为了实现该目的，内容分发系统包括用于接收和再现通过使用制造商提供的预算而创建的加密内容的内容接收装置（21A，22A，23A），内容接收装置（21A，22A，23A） A，23A）包括用于接收内容的接收装置91，用于输入由购买制造商制造的产品而给出的解密密钥的输入装置（93），用于在输入时解密的解密装置（96） 所述解密密钥由所述输入装置（93）对所述接收装置（93）通过所述解密密钥进行的加密; 以及用于再现由解密装置（96）解密的内容的查看装置（92）。

公开(公告)号：US20050041550A1

公开(公告)日：2005-02-24

申请号：US10919239

申请日：2004-08-17

申请人： Hideki Aikoh ,  Takao Hayashi ,  Tohru Nakamura

发明人： Hideki Aikoh ,  Takao Hayashi ,  Tohru Nakamura

IPC分类号： G11B7/00 ,  G11B7/08 ,  G11B7/095

CPC分类号： G11B7/0956

摘要： When the tilt of an optical disk is detected using a light source of an optical head, the optical head cannot be simplified enough and an optical-disk tilt cannot be detected adequately. The optical head includes: an LED chip; a light-converging element that converges the light which is emitted from the LED chip upon an optical disk; a light-converging element driving means which drives the light-converging element; and a sensor which detects a tilt or a positional shift of the optical disk. In the sensor, the LED chip is placed on a semiconductor substrate which is provided with a plurality of light-receiving chips; the light emitted from the LED chip irradiates the optical disk; the light which is reflected from the optical disk is received by the plurality of light-receiving chips; and based upon the quantity of light which is received at the plurality of light-receiving chips, a tilt or a positional shift of the optical disk is detected.

摘要翻译： 当使用光头的光源检测光盘的倾斜时，光头不能够足够简化，并且不能充分地检测到光盘倾斜。 光头包括：LED芯片; 将从LED芯片发射的光会聚在光盘上的聚光元件; 聚光元件驱动装置，其驱动聚光元件; 以及检测光盘的倾斜或位置偏移的传感器。 在传感器中，将LED芯片放置在设置有多个受光芯片的半导体基板上; 从LED芯片发出的光照射光盘; 从光盘反射的光被多个光接收芯片接收; 并且基于在多个光接收芯片处接收的光量，检测光盘的倾斜或位置偏移。

公开(公告)号：US5532999A

公开(公告)日：1996-07-02

申请号：US263549

申请日：1994-06-22

申请人： Hideki Aikoh ,  Makoto Takashima ,  Hiroyuki Nakamura ,  Tohru Nakamura

发明人： Hideki Aikoh ,  Makoto Takashima ,  Hiroyuki Nakamura ,  Tohru Nakamura

IPC分类号： G11B7/13 ,  H01L27/144 ,  G11B7/00

CPC分类号： G11B7/131 ,  H01L27/1443

摘要： An optical head includes: a light source for emitting light; first optical element for forming at least three light beams from the light emitted from the light source; second optical element for converging said at least three beams on a storage medium; and a photodetector for receiving said at least three beams reflected by the storage medium to generate electrical outputs in accordance with an intensity of the light beams, the photodetector including; a semiconductor substrate; a light receiving section formed on a surface of the semiconductor substrate for receiving the light beams reflected by the storage medium; a plurality of input terminals for receiving a supply of a predetermined potential; and a plurality of output terminals for outputting electric signals, wherein the light receiving section includes a plurality of light receiving elements for signal detection provided apart from each other on the surface of the semiconductor substrate and a plurality of stray light carrier absorption regions provided so as to substantially fill regions between the plurality of light receiving elements for signal detection, and wherein the plurality of stray light carrier absorption regions are made of first impurity diffusion regions of a first-conductivity type formed in the semiconductor substrate, the first impurity diffusion regions forming PN junctions and depletion layers in the semiconductor substrate so as to absorb stray light carriers generated in the semiconductor substrate by stray light.

摘要翻译： 光头包括：用于发光的光源; 第一光学元件，用于从光源发射的光形成至少三个光束; 第二光学元件，用于将所述至少三个光束会聚在存储介质上; 以及光电检测器，用于接收由所述存储介质反射的所述至少三个光束，以根据所述光束的强度产生电输出，所述光电检测器包括： 半导体衬底; 形成在所述半导体衬底的表面上用于接收由所述存储介质反射的光束的光接收部分; 用于接收预定电位的供给的多个输入端子; 以及多个用于输出电信号的输出端子，其中，所述光接收部分包括在所述半导体衬底的表面上彼此分开设置的用于信号检测的多个光接收元件，以及多个所述杂散光载体吸收区域， 以基本上填充用于信号检测的多个光接收元件之间的区域，并且其中多个杂散光载流子吸收区域由形成在半导体衬底中的第一导电类型的第一杂质扩散区域形成，第一杂质扩散区域形成 PN结和耗尽层，以便通过杂散光吸收在半导体衬底中产生的杂散光载流子。

公开(公告)号：US07196975B1

公开(公告)日：2007-03-27

申请号：US10089409

申请日：2000-11-06

申请人： Hideki Aikoh ,  Tohru Nakamura

发明人： Hideki Aikoh ,  Tohru Nakamura

IPC分类号： G11B11/00

CPC分类号： G11B11/10584 ,  G11B11/10558 ,  G11B11/1058 ,  G11B11/10597

摘要： On a pit information surface (22d) of a read-only optical disk (22), a protective layer (22f) suited for a floating-type or a sliding-type magnetic head (3) used for a magnetic field modulation type magneto-optical disk is formed. A reproducing operation with respect to the optical disk (22) is performed while allowing the magnetic head (3) to slide on the protective layer (22f). Accordingly, a magnetic head does not need to be separated from a disk in reproduction. Thus, an optical disk device can be manufactured at lower cost and reduced in size, and a high-speed seek can be realized. Commonality of a disk cartridge (32) with the magnetic field modulation type magneto-optical disk also can be achieved. An optical disk system that is user-friendly thus can be obtained.

摘要翻译： 在只读光盘（22）的凹坑信息表面（22d）上，适用于用于磁场调制型的浮动型或滑动型磁头（3）的保护层（22f） 形成磁光盘。 在允许磁头（3）在保护层（22f）上滑动的同时执行相对于光盘（22）的再现操作。 因此，磁头在再现时不需要与盘分离。 因此，可以以较低的成本制造光盘装置，并减小尺寸，并且可以实现高速搜索。 也可以实现具有磁场调制型磁光盘的盘盒（32）的通用性。 因此可以获得用户友好的光盘系统。

公开(公告)号：US20070064551A1

公开(公告)日：2007-03-22

申请号：US10579776

申请日：2004-12-02

申请人： Osamu Mizuno ,  Tohru Nakamura ,  Hideki Aikoh ,  Takao Hayashi ,  Takuya Wada

发明人： Osamu Mizuno ,  Tohru Nakamura ,  Hideki Aikoh ,  Takao Hayashi ,  Takuya Wada

IPC分类号： G11B7/00

CPC分类号： G11B7/085 ,  G11B7/08576

摘要： An optical disc apparatus includes a withdrawal means for moving an objective lens (32) to a position distant from an optical disc (1) during an inactive duration of intermittent recording or reproducing operation. A means for regulating or fixing the objective lens (32) at the position distant from the optical disc (1) is further provided. Thus, even in a noncontrolled state during the inactive duration, it is possible to prevent collision of the objective lens (32) with the optical disc (1). As a result, both power saving and safety of the apparatus can be attained.

摘要翻译： 一种光盘装置，包括一个取出装置，用于在间歇的记录或再现操作的非活动时间期间将物镜（32）移动到远离光盘（1）的位置。 还提供用于在离开光盘（1）的位置处调节或固定物镜（32）的装置。 因此，即使在非活动持续时间的非受控状态下，也可以防止物镜（32）与光盘（1）的碰撞。 结果，可以实现装置的节电和安全。