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    Optical disc recording and retrieval system
    1.
    发明授权
    Optical disc recording and retrieval system 失效
    光盘记录和检索系统

    公开(公告)号：US4433403A

    公开(公告)日：1984-02-21

    申请号：US254274

    申请日：1981-04-15

    申请人： Sueki Baba ,  Tomio Yoshida ,  Nobuo Akahira ,  Tadaoki Yamashita

    发明人： Sueki Baba ,  Tomio Yoshida ,  Nobuo Akahira ,  Tadaoki Yamashita

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/135 ,  G11B7/20 ,  G11B20/10 ,  G11B27/30 ,  G11B27/22

    CPC分类号： G11B7/004 ,  G11B20/10 ,  G11B27/30

    摘要： An optical signal recording and reproduction or retrieval system which records a primary signal on a recording track provided on a recording medium by projecting a laser beam which has been modulated by the primary signal onto the recording track, and further records a secondary signal, by superposition, on the recording track by projecting the laser beam which has been modulated by the secondary signal having a frequency band which is different from that of the primary signal onto the recording track for enabling the deleting of the previously recorded primary signal.

    摘要翻译： 一种光信号记录和再现或检索系统，其通过将已经被主信号调制的激光束投射到记录轨道上，将记录在记录介质上的记录轨道上的主信号记录在记录轨道上，并且通过叠加来记录辅助信号 通过将具有与主信号不同的频带的辅助信号调制的激光束投射到记录轨道上，以便能够删除先前记录的主信号，在记录轨道上。

    Optical recording and reproducing disc
    2.
    发明授权
    Optical recording and reproducing disc 失效
    光学记录和再现光盘

    公开(公告)号：US4385303A

    公开(公告)日：1983-05-24

    申请号：US254276

    申请日：1981-04-15

    申请人： Nobuo Akahira ,  Michiyoshi Nagashima ,  Shunji Harigae ,  Tomio Yoshida ,  Tadaoki Yamashita

    发明人： Nobuo Akahira ,  Michiyoshi Nagashima ,  Shunji Harigae ,  Tomio Yoshida ,  Tadaoki Yamashita

    IPC分类号： G11B7/00 ,  G11B7/007 ,  G11B7/24 ,  G11B7/26 ,  G11B7/30 ,  G01D15/34

    CPC分类号： G11B7/24 ,  G11B7/24079 ,  G11B7/26

    摘要： An optical recording and reproducing disc for recording and/or reproducing information by the application of laser beams having a wavelength .lambda. in the range of 0.7 to 1.0 .mu.m, the disc being constituted by a disc-shaped base having at least one spiral guide track thereon with top surfaces parallel to the surface of the base at a height above the base different from the top surfaces of the portions of the base between the spires of the track, which height is in the range of .lambda./12 to .lambda./6, the guide track having a width approximately equal to the effective diameter of the laser beams; and a uniform thickness coating of a light recording material on the top surface of the guide track and the portions of the base between the spires of the guide track, the light recording material being a material the transmittance and/or the reflectance of which is varied by irradiation by the laser beams.

    摘要翻译： 一种用于通过应用波长λ在0.7至1.0μm范围内的激光束来记录和/或再现信息的光学记录和再现盘，该盘由具有至少一个螺旋导轨的盘形基座 其上表面平行于基座的表面，高于基座上方的高度不同于轨道尖端之间的基部部分的顶表面的高度，该高度在λ/ 12至λ/ 6的范围内， 所述导轨具有大致等于所述激光束的有效直径的宽度; 以及在导轨的顶表面上的光记录材料的均匀厚度涂层以及在导轨的尖端之间的基部的部分，光记录材料是透射率和/或其反射率变化的材料 通过激光束照射。

    Method and apparatus for recording and reproducing information on and from an optical disk
    4.
    发明授权
    Method and apparatus for recording and reproducing information on and from an optical disk 失效
    用于在光盘上记录和再现信息的方法和装置

    公开(公告)号：US4322839A

    公开(公告)日：1982-03-30

    申请号：US069570

    申请日：1979-08-24

    申请人： Tadaoki Yamashita ,  Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Mutsuo Takenaga

    发明人： Tadaoki Yamashita ,  Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Mutsuo Takenaga

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/24

    CPC分类号： G11B7/00455 ,  G11B7/24

    摘要： The optical density and/or the reflectivity of a recording layer included in an optical disk is selectively changed to record information by irradiation with a semiconductor laser beam, while the recording layer may be covered with a suitable protective film. The thickness of the recording layer is so determined that it is able to record information by means of a continuous wave type semiconductor laser beam, while the optical absorption rate of the recording layer is adjusted by setting the percentages of particular additives. The recorded information may be reproduced by the application of a laser beam, the incident power of which is lower than that of the recording beam, to detect the reflected light.

    摘要翻译： 选择性地改变包括在光盘中的记录层的光密度和/或反射率以通过用半导体激光束照射来记录信息，同时可以用合适的保护膜覆盖记录层。 记录层的厚度被确定为能够通过连续波型半导体激光束记录信息，同时通过设定特定添加剂的百分比来调节记录层的光吸收率。 记录的信息可以通过施加其入射功率低于记录光束的激光束来再现以检测反射光。

    System and method of optical information storage in a recording disc
    6.
    发明授权
    System and method of optical information storage in a recording disc 失效
    光信息存储在记录盘中的系统和方法

    公开(公告)号：US4330883A

    公开(公告)日：1982-05-18

    申请号：US76725

    申请日：1979-09-18

    申请人： Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Tadaoki Yamashita

    发明人： Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Tadaoki Yamashita

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/24

    CPC分类号： G11B7/24 ,  G11B7/00455

    摘要： A system and a method of recording information by changes of refractive index and light absorption coefficient on a thin film, and reproducing the recorded information byscanning a focussed monochromatic light along a track on a thin film of a selected thickness andletting a light component reflected at a light-incident surface of said thin film and the other light component reflected at an inside face of the opposite surface to said incident surface of the thin film interfere with each other thereby efficiently to vary intensity of reflection light.

    摘要翻译： 一种通过薄膜上的折射率和光吸收系数的变化来记录信息的系统和方法，并且通过沿着所选厚度的薄膜上的轨道扫描聚焦的单色光并且使反射的光成分再现所记录的信息 在所述薄膜的光入射表面处，并且在与薄膜的入射表面相对的表面的内表面处反射的另一个光分量彼此干涉，从而有效地改变反射光的强度。

    Method and apparatus for timing variable optical information recording
    7.
    发明授权
    Method and apparatus for timing variable optical information recording 失效
    用于定时可变光信息记录的方法和装置

    公开(公告)号：US5216657A

    公开(公告)日：1993-06-01

    申请号：US939046

    申请日：1992-09-03

    申请人： Kenichi Nishiuchi ,  Noboru Yamada ,  Nobuo Akahira ,  Kazutoyo Hirosawa ,  Tomio Yoshida ,  Shinji Kubota

    发明人： Kenichi Nishiuchi ,  Noboru Yamada ,  Nobuo Akahira ,  Kazutoyo Hirosawa ,  Tomio Yoshida ,  Shinji Kubota

    IPC分类号： G11B7/0055 ,  G11B7/006 ,  G11B20/10 ,  G11B20/14

    CPC分类号： G11B20/10009 ,  G11B20/1426 ,  G11B7/00557 ,  G11B7/006

    摘要： A method and an apparatus for recording information signals on an optical information recording medium which is reversibly changeable between optically distinguishable states corresponding to an irradiating condition of a bundle of high density energy such as laser beam. The starting point of recording signals is randomly changed, and the thermal history of the recording material by the beam irradiation is averaged and the number of repetition recording times is improved. A delay circuit is provided, and reference recording gate signals are formed on the basis of format signals obtained from a recording medium, and a random delay time is set just thereafter, and the starting point of recording of recording signals is started.

    摘要翻译： 一种用于在光学信息记录介质上记录信息信号的方法和装置，该光学信息记录介质在与激光束等高密度能量束的照射条件相对应的可光辨别状态之间是可逆地改变的。 记录信号的起始点随机变化，通过光束照射对记录材料的热历史进行平均化，并且重复记录次数得到改善。 提供延迟电路，并且基于从记录介质获得的格式信号形成参考记录门信号，并且随后设置随机延迟时间，并开始记录信号的记录起始点。

    Recording/reproducing apparatus with optical path correction system
    8.
    发明授权
    Recording/reproducing apparatus with optical path correction system 失效
    具有光路校正系统的记录/再现装置

    公开(公告)号：US07123570B2

    公开(公告)日：2006-10-17

    申请号：US11052306

    申请日：2005-02-07

    申请人： Tetsuya Akiyama ,  Nobuo Akahira ,  Kenichi Nishiuchi

    发明人： Tetsuya Akiyama ,  Nobuo Akahira ,  Kenichi Nishiuchi

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1378 ,  G11B7/0908 ,  G11B7/127 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/13927 ,  G11B7/14 ,  G11B2007/0013

    摘要： A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording layers. Alternatively, with respect to at least one light source in an optical head having a single objective lens and a plurality of light sources, an optical path correction system is provided on an optical path unique to the light source, and while light emitted from one light source is focused on a specific recording layer by shifting of the objective lens, light irradiated from another light source is focused on another recording layer by the optical path correction system. Thus, information can be reproduced from or recorded in a plurality of recording layers simultaneously and an error in focusing of light onto the plurality of recording layers can be suppressed.

    摘要翻译： 相对于具有多个记录层的记录介质，每个光头都包括独立的光源和光学系统。 或者，对于具有单个物镜和多个光源的光学头中的至少一个光源，光路校正系统设置在光源独有的光路上，并且在从一个光发射的光 源通过物镜的偏移聚焦在特定记录层上，由另一光源照射的光被光路校正系统聚焦在另一记录层上。 因此，可以同时从多个记录层再现信息或记录信息，并且可以抑制将光聚焦到多个记录层上的错误。

    Optical information recording medium and optical information recording and reproducing apparatus
    10.
    发明授权
    Optical information recording medium and optical information recording and reproducing apparatus 失效
    光信息记录介质和光信息记录和再现装置

    公开(公告)号：US06975579B2

    公开(公告)日：2005-12-13

    申请号：US10702750

    申请日：2003-11-06

    申请人： Kenichi Nishiuchi ,  Naoyasu Miyagawa ,  Eiji Ohno ,  Nobuo Akahira

    发明人： Kenichi Nishiuchi ,  Naoyasu Miyagawa ,  Eiji Ohno ,  Nobuo Akahira

    IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B11/10595 ,  G11B7/0045 ,  G11B7/00456 ,  G11B7/005 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00736 ,  G11B7/08505 ,  G11B7/08511 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/126 ,  G11B7/1267

    摘要： An optical information recording and reproducing apparatus for recording and reproducing an information signal on/from both concave portions and convex portions of guide grooves formed on a recording medium is disclosed. The optical information recording and reproducing apparatus includes: an optical portion for focusing a light beam emitted from a light source on the recording medium; a focusing control portion for controlling a focal point of the light beam; a tracking control portion for controlling the position of the light beam; a selection portion for selecting which of the concave portions and the convex portions of the guide grooves are used for recording or reproducing; a polarity inverting portion for inverting the polarity of an output signal from the tracking control portion depending on a result selected by the selection portion; a waveform setting portion for setting a modulation pattern for the light; and a signal reproduction portion for demodulating the information signal from a light reflected or transmitted by recorded marks recorded on the recording medium; wherein at least one of the focusing control portion, the tracking control portion, the waveform setting portion and the signal reproduction portion has at least two kinds of operation conditions for recording and reproducing the information signal on/from the concave portions and the convex portions of the guide grooves, and wherein the operation conditions are selected depending on the result selected by the selection portion.

    摘要翻译： 公开了一种用于在形成在记录介质上的引导槽的凹部和凸部上记录和再现信息信号的光学信息记录和再现装置。 光信息记录和再现装置包括：用于将从光源发射的光束聚焦在记录介质上的光学部分; 用于控制光束的焦点的聚焦控制部分; 跟踪控制部分，用于控制光束的位置; 用于选择引导槽的哪个凹部和凸部用于记录或再现的选择部分; 极性反转部分，用于根据由选择部分选择的结果来反转来自跟踪控制部分的输出信号的极性; 用于设置光的调制图案的波形设置部分; 以及信号再现部分，用于从记录在记录介质上的记录标记反射或发射的光解调信息信号; 其中聚焦控制部分，跟踪控制部分，波形设置部分和信号再现部分中的至少一个具有至少两种操作条件，用于在凹部和凸部的凹部和凸部之间记录和再现信息信号 引导凹槽，并且其中根据由选择部分选择的结果选择操作条件。