公开(公告)号：US5930227A

公开(公告)日：1999-07-27

申请号：US903691

申请日：1997-07-31

申请人： Sadanari Fujimoto ,  Hiroharu Satoh

发明人： Sadanari Fujimoto ,  Hiroharu Satoh

IPC分类号： G11B7/0037 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B20/14 ,  G11B20/18 ,  G11B27/034 ,  G11B27/36 ,  G11B7/24

CPC分类号： G11B20/1426 ,  G11B20/182 ,  G11B27/034 ,  G11B27/36 ,  G11B7/00375 ,  G11B7/005 ,  G11B2220/2562 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/24085

摘要： Pits and lands which have a pit length of 3T, a land length of *6T, a pit length of 7T, a land length of *3T, a pit length of 6T and a land length of *7T are alternately formed in a lead-in area in an inner track area on an optical disk as a test pattern for evaluating a read error of the optical disk. This test pattern data is reproduced by a reproducing system to detect an error rate, a compensation coefficient for minimizing the error rate is acquired, and a reproduction signal is compensated by using this compensation coefficient so that the reproduction signal is reproduced with the minimized error rate by the reproducing system.

摘要翻译： 具有凹坑长度为3T，土地长度为* 6T，凹坑长度为7T，土地长度为* 3T，凹坑长度为6T，平台长度为* 7T的凹坑和平台， 在作为用于评估光盘的读取错误的测试图案的光盘上的内部轨道区域中的区域。 该测试图形数据由再现系统再现以检测错误率，获得用于最小化误差率的补偿系数，并且通过使用该补偿系数来补偿再现信号，以便以最小误差率再现再现信号 通过再现系统。

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：US5696756A

公开(公告)日：1997-12-09

申请号：US630615

申请日：1996-04-10

申请人： Sadanari Fujimoto ,  Hiroharu Satoh

发明人： Sadanari Fujimoto ,  Hiroharu Satoh

IPC分类号： G11B7/0037 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B20/14 ,  G11B20/18 ,  G11B27/034 ,  G11B27/36 ,  G11B7/24

CPC分类号： G11B20/1426 ,  G11B20/182 ,  G11B27/034 ,  G11B27/36 ,  G11B7/00375 ,  G11B7/005 ,  G11B2220/2562 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/24085

摘要： Pits and lands which have a pit length of 3T, a land length of *6T, a pit length of 7T, a land length of *3T, a pit length of 6T and a land length of *7T are alternately formed in a lead-in area in an inner track area on an optical disk as a test pattern for evaluating a read error of the optical disk. This test pattern data is reproduced by a reproducing system to detect an error rate, a compensation coefficient for minimizing the error rate is acquired, and a reproduction signal is compensated by using this compensation coefficient so that the reproduction signal is reproduced with the minimized error rate by the reproducing system.

摘要翻译： 具有凹坑长度为3T，土地长度为* 6T，凹坑长度为7T，土地长度为* 3T，凹坑长度为6T，平台长度为* 7T的凹坑和平台， 在作为用于评估光盘的读取错误的测试图案的光盘上的内部轨道区域中的区域。 该测试图形数据由再现系统再现以检测错误率，获得用于最小化误差率的补偿系数，并且通过使用该补偿系数来补偿再现信号，以便以最小误差率再现再现信号 通过再现系统。

公开(公告)号：US5892751A

公开(公告)日：1999-04-06

申请号：US843647

申请日：1997-04-10

申请人： Sadanari Fujimoto ,  Hiroharu Satoh

发明人： Sadanari Fujimoto ,  Hiroharu Satoh

IPC分类号： G11B7/0037 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B20/14 ,  G11B20/18 ,  G11B27/034 ,  G11B27/36 ,  G11B7/24

CPC分类号： G11B20/1426 ,  G11B20/182 ,  G11B27/034 ,  G11B27/36 ,  G11B7/00375 ,  G11B7/005 ,  G11B2220/2562 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/24085

摘要： Pits and lands which have a pit length of 3T, a land length of *6T, a pit length of 7T, a land length of *3T, a pit length of 6T and a land length of *7T are alternately formed in a lead-in area in an inner track area on an optical disk as a test pattern for evaluating a read error of the optical disk. This test pattern data is reproduced by a reproducing system to detect an error rate, a compensation coefficient for minimizing the error rate is acquired, and a reproduction signal is compensated by using this compensation coefficient so that the reproduction signal is reproduced with the minimized error rate by the reproducing system.

公开(公告)号：US20050265154A1

公开(公告)日：2005-12-01

申请号：US10942777

申请日：2004-09-17

申请人： Sadanari Fujimoto

发明人： Sadanari Fujimoto

IPC分类号： G11B7/0045 ,  G11B5/09 ,  G11B7/125

CPC分类号： G11B7/126 ,  G11B7/0045

摘要： An optical disk apparatus has a rotation section rotates an optical disk having a photoimageable layer that is made imageable by laser light, a pickup section having a laser radiation section, a driving section of the pickup section, an irradiation driving section supplies a driving current in a continuous pulse mode to drive the laser radiation section to irradiate onto the photoimageable layer, a generating section generates drive information for the pickup section and the irradiation driving section in accordance with gradation information per rotation of the optical disk, the gradation information being obtainable by receiving image information and transforming the image information, and a control section controls gradation of a visualized image in accordance with a driving current in the continuous pulse mode by controlling the driving section and the irradiation driving section.

摘要翻译： 一种光盘装置，具有旋转部，其旋转具有可通过激光形成的可光成像层的光盘，具有激光照射部的拾取部，拾取部的驱动部，照射驱动部， 连续脉冲模式以驱动激光辐射部分照射到可光成像层上，生成部分根据光盘旋转的灰度信息产生拾取部分和照射驱动部分的驱动信息，灰度信息可由 接收图像信息和变换图像信息，并且控制部分通过控制驱动部分和照射驱动部分来根据连续脉冲模式中的驱动电流来控制可视化图像的灰度。

公开(公告)号：US20050265157A1

公开(公告)日：2005-12-01

申请号：US10946345

申请日：2004-09-22

申请人： Sadanari Fujimoto

发明人： Sadanari Fujimoto

IPC分类号： G11B7/0045 ,  G11B5/09 ,  G11B7/00 ,  G11B7/0037

CPC分类号： G11B7/0037

摘要： An optical disk apparatus comprises a rotation section which rotates an optical disk having a photoimageable layer that is made imageable by laser light, a pickup section having a laser radiation section, a driving section for the pickup section, an irradiation drive section for the laser radiation section, an input section which inputs image information that is gradation information per rotation path of the optical disk and that is compressed to be represented by a differential component between gradations of adjoining rotation paths, and an expanding section (compressing section) which restores the differential component between the gradations of the adjoining rotation paths from the input section to original gradation information per rotation path of the optical disk. The restored gradation information per rotation path is received, and a label image is formed on the disk in accordance with the received gradation information.

摘要翻译： 一种光盘装置，包括旋转部分，该旋转部分旋转具有可激光成像的可光成像层的光盘，具有激光辐射部分的拾取部分，用于拾取部分的驱动部分，用于激光辐射的照射驱动部分 输入部分，其输入作为光盘的旋转路径的灰度信息的图像信息，并且被压缩以由相邻旋转路径的灰度之间的差分分量表示;以及扩展部（压缩部），其恢复差分 从输入部分到相对于光盘的旋转路径的原始灰度信息的相邻旋转路径的灰度之间的分量。 接收每个旋转路径恢复的灰度信息，并根据接收到的灰度信息在盘上形成标签图像。