公开(公告)号：US5475210A

公开(公告)日：1995-12-12

申请号：US73320

申请日：1993-06-08

申请人： Toyoki Taguchi ,  Toshihiro Sugaya ,  Hisashi Yamada ,  Kei Shimura ,  Isao Hoshino ,  Masahiko Tanaka ,  Teruo Murakami ,  Hiroharu Satoh ,  Hiromichi Kobori ,  Sadanari Fujimoto

发明人： Toyoki Taguchi ,  Toshihiro Sugaya ,  Hisashi Yamada ,  Kei Shimura ,  Isao Hoshino ,  Masahiko Tanaka ,  Teruo Murakami ,  Hiroharu Satoh ,  Hiromichi Kobori ,  Sadanari Fujimoto

IPC分类号： G11B7/125 ,  H01S5/022 ,  H01S5/0683 ,  H04N5/85 ,  H04N5/911 ,  G01J1/32

CPC分类号： G11B7/126 ,  H04N5/911 ,  H01S5/02248 ,  H01S5/02296 ,  H01S5/0683 ,  H04N5/85

摘要： An optical disk apparatus includes a semiconductor laser for emitting a light beam, and an automatic power control or APC circuit for driving the laser. A compound prism structure is optically coupled to the laser in an optical head section, and defines a first optical path for causing a front laser light to be projected onto a rotating optical disk and guiding a reflected light therefrom toward a first photodetector, and a second optical path for guiding a part of the reflected light toward a second photodetector. An output signal of the first photodetector is used to generate a reproduced information signal. An output signal of the second photodetector is fed back to the APC circuit as a front light monitor signal. A part of a laser control signal internally generated in the APC circuit is supplied through a wiring line to a noise reduction circuit as a laser noise monitor signal. The noise reduction circuit subtracts this noise monitor signal from the reproduced information signal to provide a noise-suppressed information signal.

摘要翻译： 光盘装置包括用于发射光束的半导体激光器和用于驱动激光器的自动功率控制或APC电路。 复合棱镜结构在光学头部分光学耦合到激光器，并且限定第一光路，用于使前激光投射到旋转光盘上并将其反射的光从第一光电检测器引导，第二光路 用于将一部分反射光引导到第二光电检测器的光路。 第一光电检测器的输出信号用于产生再生信息信号。 第二光电检测器的输出信号作为前光监视信号反馈到APC电路。 在APC电路中内部生成的激光控制信号的一部分通过布线作为激光噪声监视信号提供给降噪电路。 噪声降低电路从再生信息信号中减去该噪声监视信号，提供噪声抑制信息信号。

公开(公告)号：US5250796A

公开(公告)日：1993-10-05

申请号：US942463

申请日：1992-09-09

申请人： Toyoki Taguchi ,  Toshihiro Sugaya ,  Hisashi Yamada ,  Kei Shimura

发明人： Toyoki Taguchi ,  Toshihiro Sugaya ,  Hisashi Yamada ,  Kei Shimura

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/125 ,  G11B7/135 ,  H01S5/022 ,  H01S5/0683 ,  H04N5/85 ,  H04N5/911 ,  G01J1/32

CPC分类号： G11B7/126 ,  H04N5/911 ,  H04N5/85

摘要： An optical disk apparatus includes a semiconductor laser for emitting a light beam, and an automatic power control or APC circuit for driving the laser. A compound prism structure is optically coupled to the laser in an optical head section, and defines a first optical path for causing a front laser light to be projected onto a rotating optical disk and guiding a reflected light therefrom toward a first photodetector, and a second optical path for guiding a part of the reflected light toward a second photodetector. An output signal of the first photodetector is used to generate a reproduced information signal. An output signal of the second photodetector is fed back to the APC circuit as a front light monitor signal. A part of a laser control signal internally generated in the APC circuit is supplied through a wiring line to a noise reduction circuit as a laser noise monitor signal. The noise reduction circuit subtracts this noise monitor signal from the reproduced information signal to provide a noise-suppressed information signal.

公开(公告)号：US06301208B1

公开(公告)日：2001-10-09

申请号：US09220696

申请日：1998-12-24

申请人： Toshihiro Sugaya ,  Hiromichi Kobori ,  Kazuo Watabe

发明人： Toshihiro Sugaya ,  Hiromichi Kobori ,  Kazuo Watabe

IPC分类号： G11B70045

CPC分类号： G11B27/24 ,  G11B7/0037 ,  G11B7/007 ,  G11B7/00745 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/2575

摘要： An optical disk used for writing and reading data in units of an error correction block containing a plurality of sectors by means of a light beam and comprising land and groove tracks arranged adjacent to one another and a plurality of emboss pits formed on a boundary between the land and the groove tracks to detect respective positions of the error correction blocks.

摘要翻译： 一种用于通过光束以包含多个扇区的纠错块为单位写入和读取数据的光盘，并且包括彼此相邻布置的焊盘和凹槽轨道以及形成在第二区域之间的边界上的多个浮雕坑 焊盘和凹槽轨道，以检测错误校正块的相应位置。

公开(公告)号：US07821908B2

公开(公告)日：2010-10-26

申请号：US11289303

申请日：2005-11-30

申请人： Toshihiro Sugaya ,  Hisashi Yamada ,  Masato Otsuka

发明人： Toshihiro Sugaya ,  Hisashi Yamada ,  Masato Otsuka

IPC分类号： G11B7/24 ,  G11B7/20 ,  G11B11/00

CPC分类号： G11B19/127 ,  G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： A single disc is configured to deal with both HD DVD information and DVD information. This invention has the following basic elements (1) a single-sided dual layer optical disc where a light transmission layer, a first recording layer accessed with a first laser beam, an space layer, and a second recording layer accessed with a second laser beam are arranged in that order in the direction in which a laser beam enters, (2) the areal recoding density of the second recording layer is three times or more that of the first recording layer, (3) information indicating that the second recording layer has been formed is formed in the first recording layer, and (4) information indicating that the first recording layer has been formed is formed in the second recording layer.

摘要翻译： 单个光盘被配置为处理HD DVD信息和DVD信息。 本发明具有以下基本要素（1）单面双层光盘，其中光传输层，第一激光束访问的第一记录层，空间层和第二激光束访问的第二记录层 按照激光入射方向的顺序排列，（2）第二记录层的面编码密度是第一记录层的三倍以上，（3）表示第二记录层的信息 形成在第一记录层中，和（4）表示形成第一记录层的信息形成在第二记录层中。

公开(公告)号：US20070042294A1

公开(公告)日：2007-02-22

申请号：US11504580

申请日：2006-08-16

申请人： Toshihiro Sugaya ,  Masato Otsuka ,  Naomasa Nakamura ,  Nobuhisa Yoshida ,  Hisashi Yamada

发明人： Toshihiro Sugaya ,  Masato Otsuka ,  Naomasa Nakamura ,  Nobuhisa Yoshida ,  Hisashi Yamada

IPC分类号： G11B7/24 ,  G11B3/70 ,  G11B7/00

CPC分类号： G11B7/26 ,  G11B7/00736 ,  G11B7/24038 ,  G11B19/127 ,  G11B19/128 ,  G11B19/16 ,  G11B2007/0013

摘要： According to one embodiment, an optical disc is the following the distance between a light incidence plane and the first recording layer is a minimum of 550 μm. The distance between the first and the third recording layer is a maximum of 72 μm. The distance between the second and the third recording layer is a minimum of 15 μm. The distance between the first and the second recording layer is about 31 to 40 μm. The reflectivities of the first and the second recording layer with respect to the first laser beam range from 18 to 27%, and the ratio therebetween is about 1.1 or less. The reflectivity of the third recording layer is below about 6%. The areal recording density of the third recording layer is three times or more as high as that of the first recording layer and the second recording layer.

摘要翻译： 根据一个实施例，光盘之后，光入射平面与第一记录层之间的距离最小为550μm。 第一和第三记录层之间的距离最大为72μm。 第二和第三记录层之间的距离最小为15μm。 第一和第二记录层之间的距离约为31至40μm。 第一记录层和第二记录层相对于第一激光束的反射率为18〜27％，其比例为约1.1以下。 第三记录层的反射率低于约6％。 第三记录层的面积记录密度是第一记录层和第二记录层的面积记录密度的三倍以上。

公开(公告)号：US20060114808A1

公开(公告)日：2006-06-01

申请号：US11289303

申请日：2005-11-30

申请人： Toshihiro Sugaya ,  Hisashi Yamada ,  Masato Otsuka

发明人： Toshihiro Sugaya ,  Hisashi Yamada ,  Masato Otsuka

IPC分类号： G11B7/24

CPC分类号： G11B19/127 ,  G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： A single disc is configured to deal with both HD DVD information and DVD information. This invention has the following basic elements (1) a single-sided dual layer optical disc where a light transmission layer, a first recording layer accessed with a first laser beam, an space layer, and a second recording layer accessed with a second laser beam are arranged in that order in the direction in which a laser beam enters, (2) the areal recoding density of the second recording layer is three times or more that of the first recording layer, (3) information indicating that the second recording layer has been formed is formed in the first recording layer, and (4) information indicating that the first recording layer has been formed is formed in the second recording layer.

摘要翻译： 单个光盘被配置为处理HD DVD信息和DVD信息。 本发明具有以下基本要素（1）单面双层光盘，其中光传输层，第一激光束访问的第一记录层，空间层和第二激光束访问的第二记录层 按照激光入射方向的顺序排列，（2）第二记录层的面编码密度是第一记录层的三倍以上，（3）表示第二记录层的信息 形成在第一记录层中，和（4）表示形成第一记录层的信息形成在第二记录层中。

公开(公告)号：US07570566B2

公开(公告)日：2009-08-04

申请号：US11504580

申请日：2006-08-16

申请人： Toshihiro Sugaya ,  Masato Otsuka ,  Naomasa Nakamura ,  Nobuhisa Yoshida ,  Hisashi Yamada

发明人： Toshihiro Sugaya ,  Masato Otsuka ,  Naomasa Nakamura ,  Nobuhisa Yoshida ,  Hisashi Yamada

IPC分类号： G11B3/74

CPC分类号： G11B7/26 ,  G11B7/00736 ,  G11B7/24038 ,  G11B19/127 ,  G11B19/128 ,  G11B19/16 ,  G11B2007/0013

摘要： According to one embodiment, an optical disc is the following the distance between a light incidence plane and the first recording layer is a minimum of 550 μm. The distance between the first and the third recording layer is a maximum of 72 μm. The distance between the second and the third recording layer is a minimum of 15 μm. The distance between the first and the second recording layer is about 31 to 40 μm. The reflectivities of the first and the second recording layer with respect to the first laser beam range from 18 to 27%, and the ratio therebetween is about 1.1 or less. The reflectivity of the third recording layer is below about 6%. The areal recording density of the third recording layer is three times or more as high as that of the first recording layer and the second recording layer.

摘要翻译： 根据一个实施例，光盘之后，光入射平面与第一记录层之间的距离最小为550μm。 第一和第三记录层之间的距离最大为72μm。 第二和第三记录层之间的距离最小为15μm。 第一和第二记录层之间的距离约为31至40μm。 第一记录层和第二记录层相对于第一激光束的反射率为18〜27％，其比例为约1.1以下。 第三记录层的反射率低于约6％。 第三记录层的面积记录密度是第一记录层和第二记录层的面积记录密度的三倍以上。

公开(公告)号：US20060120258A1

公开(公告)日：2006-06-08

申请号：US11292140

申请日：2005-12-02

申请人： Toshihiro Sugaya ,  Hisashi Yamada ,  Masato Otsuka

发明人： Toshihiro Sugaya ,  Hisashi Yamada ,  Masato Otsuka

IPC分类号： G11B7/24

CPC分类号： G11B7/24038 ,  G11B7/0053 ,  G11B7/0945 ,  G11B7/1275

摘要： This invention enables a single disc to deal with HD DVD information and DVD information. An optical disc according to the present invention is basically specified by the following items (1) the optical disc is a single-sided dual layer optical disc, (2) the distance in the light transmission layer from an incidence plane to a first recording layer is 578 to (578+2p) μm (2p is the maximum value of substrate thickness accuracy), (3) the distance in the space layer between the first recording layer and a second recording layer is (62−2p−2q) to (62−2p) μm (2q is the maximum value of space layer thickness accuracy), and (4) the areal recording density of the first recording layer is three times or more as high as that of the second recording layer.

摘要翻译： 本发明使得单个盘能够处理HD DVD信息和DVD信息。 根据本发明的光盘基本上由以下项目（1）指定：光盘是单面双层光盘，（2）光透射层中从入射面到第一记录层的距离 是578〜（578 + 2p）mum（2p是基板厚度精度的最大值），（3）第一记录层与第二记录层之间的空间层的距离为（62-2p-2q）〜（ 62-2p）mum（2q是空间层厚度精度的最大值），（4）第一记录层的面积记录密度是第二记录层的面积记录密度的三倍以上。

公开(公告)号：US5661711A

公开(公告)日：1997-08-26

申请号：US582283

申请日：1996-01-03

申请人： Masahiko Tanaka ,  Toshihiro Sugaya

发明人： Masahiko Tanaka ,  Toshihiro Sugaya

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/09 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B19/12

CPC分类号： G11B7/127 ,  G11B11/10532 ,  G11B11/10543 ,  G11B11/10597 ,  G11B19/12 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/12 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/1372 ,  G11B11/10576 ,  G11B2007/0006 ,  G11B7/0037 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0909

摘要： An optical head has a first light source for emitting a first light beam having a first wavelength, a second light source for emitting a second light beam having a second wavelength larger than the first wavelength, and an optical system for guiding the first and second light beams to an optical disc and guiding light beams reflected by the optical disc to an optical detector. The optical system comprises an objective lens, a beam splitter for reflecting the first light beam and the S-polarized component of the second light beam and transmitting the P-polarized component of the second light beam, and a quarter wavelength plate. When a high density medium is set against the optical hend, recording is performed by the second light beam and reproduction is performed by the first light beam. When a low density medium is set against the optical head, recording and reproduction are carried out by the second light beam. A single optical head provides read/write compatibility with optical discs of different densities, and recording and reproduction can be made on a high density optical disc.

摘要翻译： 光头具有用于发射具有第一波长的第一光束的第一光源，用于发射具有大于第一波长的第二波长的第二光束的第二光源和用于引导第一和第二光的光学系统 光束到光盘并将由光盘反射的光束引导到光学检测器。 该光学系统包括物镜，用于反射第二光束的第一光束和S偏振分量的光束分离器，并传输第二光束的P偏振分量和四分之一波长板。 当高密度介质相对于光学头设置时，通过第二光束执行记录，并且通过第一光束执行再现。 当将低密度介质设置在光头上时，通过第二光束进行记录和再现。 单个光学头提供与不同密度的光盘的读/写兼容性，并且可以在高密度光盘上进行记录和再现。

公开(公告)号：US20060120259A1

公开(公告)日：2006-06-08

申请号：US11293366

申请日：2005-12-05

申请人： Toshihiro Sugaya ,  Hisashi Yamada

发明人： Toshihiro Sugaya ,  Hisashi Yamada

IPC分类号： G11B7/24

CPC分类号： G11B7/24038

摘要： A single-sided dual layer optical disc of the invention comprises a first light transmission layer, a first recording layer which is accessed with a first laser beam, a second light transmission layer, and a second recording layer which is accessed with a second laser beam, these layers being arranged in that order from an incidence plane in the direction of incidence, the distance from the incidence plane to the second recording layer being 570 to 630 Am, and the areal recording density of the first recording layer being five times or more as high as that of the second recording layer.

摘要翻译： 本发明的单面双层光盘包括第一光透射层，用第一激光束访问的第一记录层，第二光透射层和第二记录层，其被第二激光束 这些层以入射方向从入射面依次排列，从入射面到第二记录层的距离为570〜630Am，第一记录层的面积记录密度为五倍以上 与第二记录层的高度一样高。