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：US20070121479A1

公开(公告)日：2007-05-31

申请号：US11699039

申请日：2007-01-29

申请人： Hideo Ando ,  Kazuo Watabe ,  Hiroharu Sato ,  Toshihiro Sugaya ,  Chosaku Noda

发明人： Hideo Ando ,  Kazuo Watabe ,  Hiroharu Sato ,  Toshihiro Sugaya ,  Chosaku Noda

IPC分类号： G11B7/24

CPC分类号： G11B7/00745 ,  G11B20/1217 ,  G11B20/1262 ,  G11B20/1833 ,  G11B27/24 ,  G11B27/3027 ,  G11B2020/10898 ,  G11B2020/1222 ,  G11B2020/1287 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562 ,  G11B2220/2575

摘要： User data recording areas and intermediate areas are alternately arranged on a disk. The intermediate area records at least information for synchronization.

摘要翻译： 用户数据记录区域和中间区域交替地布置在盘上。 中间区域至少记录用于同步的信息。

公开(公告)号：US20070041295A1

公开(公告)日：2007-02-22

申请号：US11504613

申请日：2006-08-16

申请人： Toshihiro Sugaya ,  Masato Otsuka

发明人： Toshihiro Sugaya ,  Masato Otsuka

IPC分类号： G11B27/22 ,  G11B3/70

CPC分类号： G11B7/24038 ,  G11B7/1275 ,  G11B2007/0006 ,  G11B2220/235

摘要： An optical disc is based on the following the distance of the light transmission layer from a light incidence plane to 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 are 18% or more, and the ratio between the reflectivities is about 1.15 or less. The areal recording density of the third recording layer is three times or more as high as the areal recording density of the first and the second recording layer.

摘要翻译： 光盘基于以下，光透射层从光入射面到第一记录层的距离最小为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。 第一和第二记录层相对于第一激光束的反射率为18％以上，反射率之比约为1.15以下。 第三记录层的面积记录密度是第一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：US20050111343A1

公开(公告)日：2005-05-26

申请号：US11013687

申请日：2004-12-17

申请人： Akihito Ogawa ,  Toshihiro Sugaya

发明人： Akihito Ogawa ,  Toshihiro Sugaya

IPC分类号： G11B7/007 ,  G11B20/00 ,  G11B20/10 ,  G11B20/12 ,  G11B27/10 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B7/24 ,  G11B5/09

CPC分类号： G11B27/3027 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B20/00086 ,  G11B20/10009 ,  G11B20/12 ,  G11B20/1217 ,  G11B20/1258 ,  G11B27/105 ,  G11B27/24 ,  G11B2220/216 ,  G11B2220/235 ,  G11B2220/2562 ,  G11B2220/2575

摘要： An information recording medium has a plurality of stacked recording layers. Each recording layer has a spiral track which defines a plurality of rounds, and at least one index header aligned in the radial direction of the disk to partially intercept the spiral track. The index header has address data of each round of the spiral track, which is formed by embossed pits, and some or all of the index headers of the first and second recording layers are laid out to overlap each other when viewed from the predetermined surface.

摘要翻译： 信息记录介质具有多个层叠的记录层。 每个记录层具有限定多个圆的螺旋轨道，以及沿盘的径向对准的至少一个索引头，以部分地截取螺旋轨道。 索引标题具有由压花凹坑形成的每一圈螺旋形轨道的地址数据，并且当从预定表面观察时，第一和第二记录层的一些或全部索引标题被布置成彼此重叠。

公开(公告)号：US5708651A

公开(公告)日：1998-01-13

申请号：US738656

申请日：1996-10-30

申请人： Toshihiro Sugaya ,  Yoshinori Honguh

发明人： Toshihiro Sugaya ,  Yoshinori Honguh

IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/24079 ,  G11B7/24085 ,  H04N5/85 ,  H04N9/804 ,  H04N9/87

CPC分类号： G11B7/24085 ,  G11B7/0051 ,  G11B7/0938 ,  G11B7/24038 ,  G11B7/24079 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/87

摘要： An optical disk comprises a substrate, and a recording layer which is formed on the substrate and on which information is recorded at specific pitches in the form of pit trains, wherein the information is reproduced by projecting a light beam via an object lens, and when the wavelength of the light beam is .lambda. .mu.m and the numerical aperture of the object lens is NA, the track pitch is set in the range of (0.72 to 0.8).times..lambda./NA/1.14 .mu.m, and each of the pits has a trapezoid cross section whose upper width is in the range of (0.3 to 0.5).times..lambda./NA/1.14 .mu.m and whose lower width is in the range of (0.2 to 0.32).times..lambda./NA/1.14 .mu.m or whose inner wall has an angle of 30.degree. to 70.degree..

摘要翻译： 光盘包括基板和记录层，其形成在基板上，并以凹坑列的形式以特定间距记录信息，其中通过经由物镜投射光束来再现信息，并且当 光束的波长为λm m，物镜的数值孔径为NA，轨道间距设定在（0.72〜0.8）×λ/NA/1.14μm的范围内，并且每个凹坑具有 其上宽度在（0.3〜0.5）×λ/NA/1.14μm的范围内且其下宽度在（0.2〜0.32）×λ/NA/1.14μm的范围内的梯形截面，或者其内部 墙壁的角度为30°至70°。

公开(公告)号：US5592464A

公开(公告)日：1997-01-07

申请号：US475494

申请日：1995-06-07

申请人： Toshihiro Sugaya ,  Yoshinori Honguh

发明人： Toshihiro Sugaya ,  Yoshinori Honguh

IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/24079 ,  G11B7/24085 ,  H04N5/85 ,  H04N9/804 ,  H04N9/87

CPC分类号： G11B7/24085 ,  G11B7/0051 ,  G11B7/0938 ,  G11B7/24038 ,  G11B7/24079 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/87

摘要： An optical disk comprises a substrate, and a recording layer which is formed on the substrate and on which information is recorded at specific pitches in the form of pit trains, wherein the information is reproduced by projecting a light beam via an object lens, and when the wavelength of the light beam is .lambda..mu.m and the numerical aperture of the object lens is NA, the track pitch is set in the range of (0.72 to 0.8).times..lambda./NA/1.14 .mu.m, and each of the pits has a trapezoid cross section whose upper width is in the range of (0.3 to 0.5).times./NA/1.14 .mu.m and whose lower width is in the range of (0.2 to 0.32).times..lambda./NA/1.14 .mu.m or whose inner wall has an angle of 30.degree. to 70.degree..

摘要翻译： 光盘包括基板和记录层，其形成在基板上，并以凹坑列的形式以特定间距记录信息，其中通过经由物镜投射光束来再现信息，并且当 光束的波长为λm m，物镜的数值孔径为NA，轨道间距设定在（0.72〜0.8）×λ/NA/1.14μm的范围内，并且每个凹坑具有 其上宽度在（0.3〜0.5）×（NA）/1.14μm的范围内，下宽度在（0.2〜0.32）×λ/NA/1.14μm的范围内的梯形截面，或者其内壁 角度为30°至70°。

公开(公告)号：US5513164A

公开(公告)日：1996-04-30

申请号：US407034

申请日：1995-03-17

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, includes 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 head, 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。 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。 当高密度介质被设置在光头上时，通过第二光束执行记录，并且由第一光束执行再现。 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：US5459712A

公开(公告)日：1995-10-17

申请号：US304849

申请日：1994-09-13

申请人： Toshihiro Sugaya ,  Yoshinori Honguh

发明人： Toshihiro Sugaya ,  Yoshinori Honguh

IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/24079 ,  G11B7/24085 ,  H04N5/85 ,  H04N9/804 ,  H04N9/87

CPC分类号： G11B7/24085 ,  G11B7/0051 ,  G11B7/0938 ,  G11B7/24038 ,  G11B7/24079 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/87

摘要： An optical disk comprises a substrate, and a recording layer which is formed on the substrate and on which information is recorded at specific pitches in the form of pit trains, wherein the information is reproduced by projecting a light beam via an object lens, and when the wavelength of the light beam is .lambda..mu.m and the numerical aperture of the object lens is NA, the track pitch is set in the range of (0.72 to 0.8).times..lambda./NA/1.14 .mu.m, and each of the pits has a trapezoid cross section whose upper width is in the range of (0.3 to 0.5).times..lambda./NA/1.14 .mu.m and whose lower width is in the range of (0.2 to 0.32).times..lambda./NA/1.14 .mu.m or whose inner wall has an angle of 30.degree. to 70.degree..

摘要翻译： 光盘包括基板和记录层，其形成在基板上，并以凹坑列的形式以特定间距记录信息，其中通过经由物镜投射光束来再现信息，并且当 光束的波长为λm m，物镜的数值孔径为NA，轨道间距设定在（0.72〜0.8）×λ/NA/1.14μm的范围内，并且每个凹坑具有 其上宽度在（0.3〜0.5）×λ/NA/1.14μm的范围内且其下宽度在（0.2〜0.32）×λ/NA/1.14μm的范围内的梯形截面，或者其内部 墙壁的角度为30°至70°。

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.