公开(公告)号：US07507457B2

公开(公告)日：2009-03-24

申请号：US11140928

申请日：2005-06-01

申请人： Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

发明人： Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

IPC分类号： B32B3/02

CPC分类号： G11B7/241 ,  G11B7/2533 ,  G11B7/2542 ,  Y10T428/21

摘要： An optical recording medium includes a support substrate, and a light transmission layer 12 that is disposed so as to come in contact with the support substrate. At least one of a refractive index of the support substrate and a refractive index of the light transmission layer, and an extinction coefficient of the support substrate and an extinction coefficient of the light transmission layer is different. As such, according to the invention, a reflective layer is not formed between the support substrate and the light transmission layer, such that the support substrate and the light transmission layer directly come in contact with each other. Accordingly, since at least one of the refractive index and the extinction coefficient is different, reflection occurs at the interface between the support substrate and the light transmission layer. Therefore, data held by a plurality of pits, that are arranged on the support substrate in a spiral shape or a concentric shape, can be correctly read out.

摘要翻译： 光记录介质包括支撑基板和布置成与支撑基板接触的光透射层12。 支撑基板的折射率和光透射层的折射率以及支撑基板的消光系数和光透射层的消光系数中的至少一个是不同的。 因此，根据本发明，在支撑基板和光透射层之间不形成反射层，使得支撑基板和光传输层直接相互接触。 因此，由于折射率和消光系数中的至少一个不同，所以在支撑基板和光透射层之间的界面处发生反射。 因此，可以正确地读出由布置在支撑基板上的螺旋形状或同心形状的由多个凹坑保持的数据。

公开(公告)号：US20050237894A1

公开(公告)日：2005-10-27

申请号：US11111912

申请日：2005-04-22

申请人： Koji Mishima ,  Kenji Yamaga ,  Daisuke Yoshitoku

发明人： Koji Mishima ,  Kenji Yamaga ,  Daisuke Yoshitoku

IPC分类号： G11B7/243 ,  G11B7/24

CPC分类号： G11B7/243 ,  G11B7/24038 ,  G11B2007/24314 ,  G11B2007/2432

摘要： An optical recording medium and a method of recording and reproducing of the optical recording medium are provided, which are capable of recording and reproducing data with reliability even when blue or blue violet laser light is used as irradiation light. The optical recording medium has a recording layer in which a recording mark composed of a plurality of cavities is formed by irradiation of the laser light. The recording layer is configured so that, in a plan view taken in a direction of irradiation of the laser light, cavities lying in an area of the center and its vicinities of the recording mark, out of the plurality of cavities, include cavities greater than ones lying around the area.

摘要翻译： 提供光记录介质和记录和再现光记录介质的方法，其即使在使用蓝色或蓝紫色激光作为照射光时也能够可靠地记录和再现数据。 光记录介质具有记录层，其中通过照射激光形成由多个空腔组成的记录标记。 记录层被构造成使得在沿着激光的照射方向拍摄的平面图中，位于多个空腔中的位于中心的区域和记录标记附近的空腔包括大于 躺在该地区的人。

公开(公告)号：US07399511B2

公开(公告)日：2008-07-15

申请号：US11111911

申请日：2005-04-22

申请人： Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

发明人： Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

IPC分类号： B32B3/02

CPC分类号： G11B7/266 ,  G11B7/24038 ,  G11B7/243 ,  G11B2007/24314 ,  G11B2007/2432

摘要： An optical recording medium is provided, which are capable of recording and reproducing data with reliability even when blue or blue violet laser light is used as irradiation light. The optical recording medium includes a substrate, and a recording layer formed over the substrate and having its optical characteristic changed by irradiation of the laser light. The recording layer is substantially composed of Bi and O, and the ratio of the number of the O atoms to the total number of Bi and O atoms in the recording layer is 63-73%.

摘要翻译： 提供了一种光学记录介质，其即使在使用蓝色或蓝色紫色激光作为照射光时也能够可靠地记录和再现数据。 光记录介质包括基板和形成在基板上并且其光学特性通过照射激光而改变的记录层。 记录层基本上由Bi和O组成，并且O原子数与记录层中Bi和O原子总数之比为63-73％。

公开(公告)号：US07385911B2

公开(公告)日：2008-06-10

申请号：US10984961

申请日：2004-11-10

申请人： Daisuke Yoshitoku ,  Koji Mishima ,  Kenji Yamaga ,  Tsuyoshi Komaki ,  Shigeru Yamatsu

发明人： Daisuke Yoshitoku ,  Koji Mishima ,  Kenji Yamaga ,  Tsuyoshi Komaki ,  Shigeru Yamatsu

IPC分类号： G11B7/24

CPC分类号： G11B7/243 ,  G11B7/2403 ,  G11B7/24067 ,  G11B7/2533 ,  G11B7/2572 ,  G11B2007/24314 ,  G11B2007/2432 ,  Y10T428/21

摘要： In an information recording medium according to the present invention, a recording layer, a first layer, and a second layer are formed so that a thermal conductivity of the first layer that contacts one surface of the recording layer and a thermal conductivity of the second layer that contacts another surface of the recording layer are both lower than a thermal conductivity of the recording layer and a track pitch is in a range of 0.1 μm to 0.5 μm, inclusive.

摘要翻译： 在根据本发明的信息记录介质中，形成记录层，第一层和第二层，使得与记录层的一个表面接触的第一层的热导率和第二层的导热率 接触记录层的另一个表面都低于记录层的热导率，轨道间距在0.1μm至0.5μm的范围内，包括端面。

公开(公告)号：US20050237904A1

公开(公告)日：2005-10-27

申请号：US11097236

申请日：2005-04-04

申请人： Giichi Shibuya ,  Teiichiro Oka ,  Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

发明人： Giichi Shibuya ,  Teiichiro Oka ,  Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

IPC分类号： G11B7/005 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135 ,  G11B7/13

CPC分类号： G11B7/133 ,  G11B7/24038

摘要： The invention relates to a light-receiving element for receiving a reflection of laser light irradiated to a rotating multi-layer recording medium having a plurality of information recording layers stacked one over another and for converting the light into an electrical signal, an optical head having the element for recording information in the multi-layer recording medium or reproducing information recorded therein, and an optical recording/reproducing apparatus and a method of optical recording and reproduction. The invention provides a light-receiving element, an optical head, an optical recording/reproducing apparatus, and a method of optical recording and reproduction which make it possible to eliminate a noise component superimposed on reflected light from a multi-layer recording medium to reproduce an RF signal of high quality. The light receiving element receives a reflection of laser light irradiated through an objective lens to a rotating multi-layer recording medium having a plurality of information recording layers stacked one over another through a return path optical system and converts the reflected light into an electrical signal. The element has a first light-receiving section having a circular light-receiving region and a second light-receiving section disposed adjacent to the outer circumference of the first light-receiving section in the form of a circle concentric therewith.

摘要翻译： 本发明涉及一种光接收元件，用于接收照射到具有堆叠在一起的多个信息记录层的旋转多层记录介质的激光的反射并将光转换成电信号，光头具有 用于在多层记录介质中记录信息的元件或其中记录的再现信息，以及光学记录/再现装置和光学记录和再现方法。 本发明提供一种光接收元件，光学头，光学记录/再现装置和光学记录和再现方法，其使得可以消除叠加在来自多层记录介质的反射光上的噪声分量，以便再现 高品质的射频信号。 光接收元件将通过物镜照射的激光的反射通过返回路径光学系统接收到具有通过返回路径光学系统层叠的多个信息记录层的旋转多层记录介质，并将反射光转换为电信号。 该元件具有第一光接收部分和第二光接收部分，第一光接收部分具有圆形光接收区域和第二光接收部分，该第二光接收部分设置成与第一光接收部分的圆周同心的圆周的外周。

公开(公告)号：US07357970B2

公开(公告)日：2008-04-15

申请号：US11012336

申请日：2004-12-16

申请人： Daisuke Yoshitoku ,  Koji Mishima ,  Kenji Yamaga ,  Hitoshi Arai

发明人： Daisuke Yoshitoku ,  Koji Mishima ,  Kenji Yamaga ,  Hitoshi Arai

IPC分类号： B32B3/02

CPC分类号： G11B7/257 ,  G11B7/24038 ,  G11B7/243 ,  G11B2007/24304 ,  G11B2007/2432 ,  Y10T428/21

摘要： An optical recording medium comprising: a substrate 11; and a recording layer 12, formed on substrate 11; and characterized in that recording layer 12 contains palladium oxide as the main component and contains oxygen at an amount of 19 atom % to 61 atom %.

摘要翻译： 一种光记录介质，包括：基板11; 以及形成在基板11上的记录层12; 其特征在于记录层12含有氧化钯作为主要成分并含有19原子％至61原子％的氧。

公开(公告)号：US20060078706A1

公开(公告)日：2006-04-13

申请号：US11232889

申请日：2005-09-23

申请人： Daisuke Yoshitoku ,  Koji Mishima ,  Kenji Yamaga

发明人： Daisuke Yoshitoku ,  Koji Mishima ,  Kenji Yamaga

IPC分类号： B32B3/02

CPC分类号： G11B7/243 ,  G11B2007/24314 ,  G11B2007/2432 ,  Y10T428/21

摘要： An inexpensive optical recording medium is provided that can ensure recording and reproduction of data even in case of using blue or blue-violet laser light as irradiation light and can be stored for a long time. The optical recording medium includes a recording layer. The recording layer includes a recording portion and a covering portion covering at least one side of the recording portion in a thickness direction of the recording portion. The recording portion and the covering portion are substantially formed from a plurality of types of common constituent elements. Composition ratios of the constituent elements are different between the recording portion and the covering portion.

公开(公告)号：US20050174922A1

公开(公告)日：2005-08-11

申请号：US11047608

申请日：2005-02-02

申请人： Giichi Shibuya ,  Teiichiro Oka ,  Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

发明人： Giichi Shibuya ,  Teiichiro Oka ,  Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

IPC分类号： G11B7/004 ,  G11B7/00 ,  G11B7/005

CPC分类号： G11B7/005 ,  G11B2007/0006

摘要： The invention relates to an optical head and an optical recording/reproducing apparatus for recording information in an optical recording medium or reproducing information recorded therein and a method of optical recording/reproduction utilizing the same. The invention provides an optical head and an optical recording/reproducing apparatus capable of reproducing an RF signal of high quality by eliminating a noise component superimposed on reflected light from a recording medium and a method of optical recording/reproduction utilizing the same. The optical head has an RF signal extraction circuit for extracting an RF signal including information recorded in a rotating recording medium. The RF signal extraction circuit has a low-pass filter for eliminating the RF signal from an electrical signal obtained by performing photoelectric conversion of laser light irradiated to and reflected by the recording medium to extract a noise signal and a differential amplifier circuit connected to the low-pass filter to perform a differential operation between the electrical signal and the noise signal.

摘要翻译： 本发明涉及一种用于在光学记录介质中记录信息或再现记录在其中的信息的光学头和光学记录/再现装置以及使用该光学记录/再现的光学记录/再现方法。 本发明提供了一种能够通过消除叠加在来自记录介质的反射光上的噪声分量来再现高品质的RF信号的光学头和光学记录/再现装置，以及使用该RF信号的光学记录/再现方法。 光头具有用于提取包括记录在旋转记录介质中的信息的RF信号的RF信号提取电路。 RF信号提取电路具有低通滤波器，用于从通过对照射到记录介质并由其反射的激光进行光电转换而获得的电信号中消除RF信号，以提取噪声信号，以及连接到低电平的差分放大器电路 通过滤波器来执行电信号和噪声信号之间的差分操作。

公开(公告)号：US07932015B2

公开(公告)日：2011-04-26

申请号：US10748979

申请日：2003-12-30

申请人： Koji Mishima ,  Hiroyasu Inoue ,  Tsuyoshi Komaki ,  Daisuke Yoshitoku ,  Hitoshi Arai ,  Kenji Yamaga ,  Hironori Kakiuchi

发明人： Koji Mishima ,  Hiroyasu Inoue ,  Tsuyoshi Komaki ,  Daisuke Yoshitoku ,  Hitoshi Arai ,  Kenji Yamaga ,  Hironori Kakiuchi

IPC分类号： G11B7/24

CPC分类号： G11B7/24038 ,  G11B7/2433 ,  G11B7/256 ,  G11B7/257 ,  Y10S430/146

摘要： An optical recording medium includes a substrate and a plurality of recording layers laminated via at least intermediate layers, at least one of the recording layers other than a recording layer farthest from a light incidence plane among the plurality of recording layers containing at least one metal M selected from a group consisting of Ni, Cu, Si, Ti, Ge, Zr, Nb, Mo, In, Sn, W, Pb, Bi, Zn and La and an element X which can combine with the metal M upon being irradiated with a laser beam for recording data, thereby forming a crystal of a compound of the element X with the metal M. According to the thus constituted optical recording medium, it is possible to record data in and reproduce from a farthest recording layer from a light incidence plane in a desired manner and it is possible to record data in and reproduce from recording layer(s) other than the farthest recording layer from the light incidence plane in a desired manner.

摘要翻译： 一种光记录介质，包括至少中间层层叠的基板和多层记录层，所述多个记录层中的至少一个记录层，其中所述多个记录层中的至少一个记录层不同于多个记录层中最远离光入射面的记录层， 选自由Ni，Cu，Si，Ti，Ge，Zr，Nb，Mo，In，Sn，W，Pb，Bi，Zn和La组成的组中的一种元素X，以及可以与金属M组合的元素X 用于记录数据的激光束，从而用金属M形成元件X的化合物的晶体。根据这样构成的光学记录介质，可以将记录数据从最远的记录层记录并从其再现 以期望的方式平面，并且可以以期望的方式将数据记录在除光入射平面以外的记录层之外的记录层并从其再现。

公开(公告)号：US07447139B2

公开(公告)日：2008-11-04

申请号：US11097236

申请日：2005-04-04

申请人： Giichi Shibuya ,  Teiichiro Oka ,  Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

发明人： Giichi Shibuya ,  Teiichiro Oka ,  Koji Mishima ,  Daisuke Yoshitoku ,  Kenji Yamaga

IPC分类号： G11B7/00

CPC分类号： G11B7/133 ,  G11B7/24038

摘要： The invention relates to a light-receiving element for receiving a reflection of laser light irradiated to a rotating multi-layer recording medium having a plurality of information recording layers stacked one over another and for converting the light into an electrical signal, an optical head having the element for recording information in the multi-layer recording medium or reproducing information recorded therein, and an optical recording/reproducing apparatus and a method of optical recording and reproduction. The invention provides a light-receiving element, an optical head, an optical recording/reproducing apparatus, and a method of optical recording and reproduction which make it possible to eliminate a noise component superimposed on reflected light from a multi-layer recording medium to reproduce an RF signal of high quality. The light receiving element receives a reflection of laser light irradiated through an objective lens to a rotating multi-layer recording medium having a plurality of information recording layers stacked one over another through a return path optical system and converts the reflected light into an electrical signal. The element has a first light-receiving section having a circular light-receiving region and a second light-receiving section disposed adjacent to the outer circumference of the first light-receiving section in the form of a circle concentric therewith.

摘要翻译： 本发明涉及一种光接收元件，用于接收照射到具有堆叠在一起的多个信息记录层的旋转多层记录介质的激光的反射并将光转换成电信号，光头具有 用于在多层记录介质中记录信息的元件或其中记录的再现信息，以及光学记录/再现装置和光学记录和再现方法。 本发明提供一种光接收元件，光学头，光学记录/再现装置和光学记录和再现方法，其使得可以消除叠加在来自多层记录介质的反射光上的噪声分量，以便再现 高品质的射频信号。 光接收元件将通过物镜照射的激光的反射通过返回路径光学系统接收到具有通过返回路径光学系统层叠的多个信息记录层的旋转多层记录介质，并将反射光转换为电信号。 该元件具有第一光接收部分和第二光接收部分，第一光接收部分具有圆形光接收区域和第二光接收部分，该第二光接收部分设置成与第一光接收部分的圆周同心的圆周的外周。