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11. 发明授权

US4855991A Optical disk having track offset detection areas 失效
标题翻译：具有轨道偏移检测区域的光盘
公开(公告)号：US4855991A
公开(公告)日：1989-08-08
申请号：US10428
申请日：1987-02-03
申请人： Toshimitsu Kaku , Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura
发明人： Toshimitsu Kaku , Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura
IPC分类号： G11B7/007 , G11B7/09 , G11B7/095 , G11B7/24 , G11B27/30
CPC分类号： G11B27/30 , G11B20/10203 , G11B7/00745 , G11B7/09 , G11B7/094 , G11B7/0956 , G11B2220/2537
摘要： An optical disk having a disk-like substrate and a recording layer provided on the substrate. First and second regions are alternately arranged along a rotational direction of the optical disk. The first region includes a pre-formed optically detectable portion having an address area, and the second region has a guide groove serving as an optical guide for a light spot. A track offset detection area is provided for detecting track offset due to inclination of the optical disk and is disposed with respect to the first region and the second region so that the light spot is not affected by the first region and the second region. The track offset detection area is preferably a mirror portion disposed between the first region and the second region.

12. 发明授权

US4293944A Information play-back apparatus with astigmatic auto-focusing 失效
标题翻译：具有散光自动对焦的信息播放装置
公开(公告)号：US4293944A
公开(公告)日：1981-10-06
申请号：US810166
申请日：1977-06-27
申请人： Morishi Izumita , Takeshi Maeda , Yoshito Tsunoda , Susumu Sawano
发明人： Morishi Izumita , Takeshi Maeda , Yoshito Tsunoda , Susumu Sawano
IPC分类号： G11B7/0037 , G11B7/09 , G11B7/095 , G11B7/12 , G11B17/00
CPC分类号： G11B7/0037 , G11B7/0909 , G11B7/0953
摘要： Information play-back apparatus comprising a laser source, a recording medium, a photodetector, a first optical system which conducts a laser beam from the laser source to an information track on the recording medium as a read spot, and a second optical system which conducts a reflected laser beam from the information track to the photodetector through an optical element having the unidirectional lens action, said optical element being arranged in a manner to define an angle of about 45 degrees relative to the direction of the information track, and said photodetector having at least four light receiving portions divided symmetrically about two axes such that at least one light receiving portion is in each of the four quadrants formed by two axes, and one of the axes is parallel to the direction of the information track.
摘要翻译：信息回放装置，包括激光源，记录介质，光电检测器，将来自激光源的激光束传导到作为读取点的记录介质上的信息轨道的第一光学系统，以及第二光学系统，通过具有单向透镜作用的光学元件从信息轨道到光电检测器的反射激光束，所述光学元件以相对于信息轨道的方向限定约45度的角度的方式布置，并且所述光电检测器具有至少四个光接收部分围绕两个轴对称地分开，使得至少一个光接收部分在由两个轴形成的四个象限中的每一个中，并且一个轴平行于信息轨道的方向。

13. 发明授权

US4554652A Optical information processor 失效
标题翻译：光信息处理器
公开(公告)号：US4554652A
公开(公告)日：1985-11-19
申请号：US490165
申请日：1983-04-29
申请人： Takeshi Maeda , Yoshito Tsunoda , Takakazu Huno , Masahiro Takasago , Yasumitsu Mizoguchi
发明人： Takeshi Maeda , Yoshito Tsunoda , Takakazu Huno , Masahiro Takasago , Yasumitsu Mizoguchi
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/007 , G11B7/09 , G11B7/125 , G11B19/04 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/36
CPC分类号： G11B27/36 , G11B19/04 , G11B20/10 , G11B20/1217 , G11B20/18 , G11B7/0045 , G11B7/007 , G11B7/125 , G11B2220/2537
摘要： An optical information processor records predetermined information along a track on a recording medium through the irradiation of a light beam intensity-modulated in accordance with the predetermined information. A tracking signal obtained when the light beam traces the track, is compared with first and second preset values which define a predetermined range. When the tracking signal departs from the predetermined range, the intensity modulation of the light beam or the recording operation is stopped, thereby preventing data destruction which otherwise occurs due to the digression of the light beam from the track.
摘要翻译：光学信息处理器通过照射根据预定信息强度调制的光束，沿着记录介质上的轨道记录预定信息。当光束跟踪轨道时获得的跟踪信号与限定预定范围的第一和第二预设值进行比较。当跟踪信号偏离预定范围时，光束的强度调制或记录操作停止，从而防止由于来自轨迹的光束的分离而出现的数据破坏。

14. 发明授权

US4532522A Optical recording apparatus 失效
标题翻译：光记录装置
公开(公告)号：US4532522A
公开(公告)日：1985-07-30
申请号：US408678
申请日：1982-08-16
申请人： Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura , Toshimitsu Kaku
发明人： Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura , Toshimitsu Kaku
IPC分类号： G02B27/42 , G11B7/00 , G11B7/004 , G11B7/08 , G11B7/09 , G11B7/095 , G11B7/125 , G11B21/10
CPC分类号： G11B7/09 , G11B7/0903 , G11B7/125
摘要： An optical recording apparatus wherein in front and rear of a first light spot for recording predetermined information along a guide groove provided in a recording medium beforehand, two second light spots and two third light spots are arranged along the guide groove and in a manner to mutually deviate from the center of the guide groove; the second light spots are arranged in an area with no information recorded therein, while the third light spots are arranged in an area with the information recorded therein; and the position of the first light spot is controlled on the basis of the difference between the quantities of light of the second light spots and the difference between the quantities of light of the third light spots, so as to track the information.
摘要翻译：一种光学记录装置，其特征在于，在预先在设置于记录介质中的引导槽记录预定信息的第一光点的前方和后方，沿引导槽配置两个第二光点和两个第三光点，偏离导槽的中心; 第二光点被布置在没有记录信息的区域中，而第三光点被布置在其中记录有信息的区域中; 并且基于第二光点的光量与第三光点的光量之差的差来控制第一光点的位置，以便跟踪信息。

15. 发明授权

US4525826A Optical track position detecting apparatus and optical information processor using the same 失效
标题翻译：光轨位置检测装置及使用其的光信息处理器
公开(公告)号：US4525826A
公开(公告)日：1985-06-25
申请号：US402234
申请日：1982-07-27
申请人： Shigeru Nakamura , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku , Takeshi Maeda , Tsuyoshi Kato
发明人： Shigeru Nakamura , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku , Takeshi Maeda , Tsuyoshi Kato
IPC分类号： G01B11/00 , G11B7/09 , G11B7/095 , G11B7/12 , G11B7/13 , G11B7/00
CPC分类号： G11B7/0901 , G11B7/09 , G11B7/0953 , G11B7/12 , G11B7/13
摘要： In an optical information processor such as an optical disc apparatus, when a light beam is irradiated to a plurality of tracks on an information recording medium, the plurality of tracks act as a diffraction grating. Areas in which light receiving parts of a light detector are arranged are determined by a track pitch, a wavelength and a numerical aperture of a condenser lens so that the light detector detects only a change in a light intensity due to an interference between a 0-order diffracted light ray and a 1-order diffracted light ray.
摘要翻译：在诸如光盘装置的光学信息处理器中，当光束照射到信息记录介质上的多个轨道时，多个轨道用作衍射光栅。通过光圈间距，聚光透镜的波长和数值孔径确定其中布置有光检测器的光接收部分的区域，使得光检测器仅检测由于0- 1级衍射光线和1级衍射光线。

16. 发明授权

US4163149A Automatic focusing apparatus 失效
标题翻译：自动对焦装置
公开(公告)号：US4163149A
公开(公告)日：1979-07-31
申请号：US819861
申请日：1977-07-28
申请人： Susumu Sawano , Yoshito Tsunoda , Takeshi Maeda
发明人： Susumu Sawano , Yoshito Tsunoda , Takeshi Maeda
IPC分类号： G11B7/09 , G01J1/36
CPC分类号： G11B7/0909 , G11B7/094
摘要： In automatic focusing apparatus comprising a laser source, optical means for causing a light beam from the laser source to follow an information track on an information recorded medium, a photodetector which consists of quartered photodetection portions and to which a reflected light beam from the information track is guided through a cylindrical lens, and means for controlling the focusing of the light beam by the use of an error signal obtained from the shape and the intensity distribution of a light spot on the four photodetection portions, the improvement wherein a compensation signal is created from the absolute value of a difference between outputs from one set of the opposing photodetection portions and the absolute value of a difference between outputs from the other set of the opposing photodetection portions, to compensate for a disturbance ascribable to a movement of the light spot on the photodetector which arises in correspondence with the error signal.
摘要翻译：在包括激光源的自动聚焦装置中，用于使来自激光源的光束跟随信息记录介质上的信息轨道的光学装置，由四分之一的光电检测部分组成的光电检测器，并且来自信息轨道的反射光束被引导通过柱面透镜，以及用于通过使用从四个光电检测部分上的光点的形状和强度分布获得的误差信号来控制光束的聚焦的装置，其中产生补偿信号的改进来自一组相对光检测部分的输出之间的差的绝对值和来自相对光检测部分的另一组的输出之间的差的绝对值，以补偿由于光斑运动引起的干扰该光检测器与误差信号相对应地产生。

17. 发明授权

US4835756A Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor 失效
标题翻译：使用具有V形导向槽和预定光学深度的光盘的光存储装置及其访问方法
公开(公告)号：US4835756A
公开(公告)日：1989-05-30
申请号：US32506
申请日：1987-03-31
申请人： Toshimitsu Kaku , Takeshi Maeda , Shigeru Nakamura , Masaru Ito , Kazuo Shigematsu , Yoshito Tsunoda
发明人： Toshimitsu Kaku , Takeshi Maeda , Shigeru Nakamura , Masaru Ito , Kazuo Shigematsu , Yoshito Tsunoda
IPC分类号： G11B7/00 , G11B7/005 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/24
CPC分类号： G11B7/0938 , G11B7/08505 , G11B7/24079 , G11B7/24076
摘要： An optical memory apparatus employs an optical disc having a plurality of guide-grooves in spiral and concentrical form and a plurality of flat tracks each arranged between adjacent two of the guide-grooves for recording information thereon, and the depth of the guide-grooves is suitably selected to increase the degree of modulation of a track cross signal, thereby performing a stable cross track counting by the use of the track cross signal and a tracking signal. One feature of the invention relies in that the modulation degree of the track cross signal is in the range between 30 and 60%. A second feature of the invention is that the guide-grooves are formed into a V shape and have an optical depth of .lambda./6 to .lambda./5 (.lambda. is the wavelength of the light used). In accordance with the invention, not ony a stable cross track counting is realized, but also the tracking signal is not practically varied with variations in the depth of the guide-grooves, thereby ensuring a highly accurate and stable tracking control.
摘要翻译：一种光存储装置采用具有多个螺旋形和同心形状的导向槽的光盘，以及多个平行轨道，每个平行轨迹布置在相邻的两个导槽之间，用于在其上记录信息，并且导向槽的深度为适当地选择以增加轨道交叉信号的调制度，从而通过使用轨道交叉信号和跟踪信号执行稳定的交叉轨道计数。本发明的一个特征在于，轨道交叉信号的调制度在30％与60％之间。本发明的第二个特征是导槽形成为V形，并且具有λ/ 6至λ/ 5的光学深度（λ是所用光的波长）。根据本发明，不能实现稳定的交叉轨道计数，而且跟踪信号实际上不随着导槽深度的变化而变化，从而确保高精度和稳定的跟踪控制。

18. 发明授权

US4725721A Autofocusing control system 失效
标题翻译：自动对焦控制系统
公开(公告)号：US4725721A
公开(公告)日：1988-02-16
申请号：US766271
申请日：1985-08-16
申请人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
发明人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
IPC分类号： G02B7/28 , G11B7/085 , G11B7/09 , G11B7/135 , G11B7/1374 , G11B7/1381
CPC分类号： G11B7/1381 , G11B7/08547 , G11B7/0908 , G11B7/0916 , G11B7/1374
摘要： An autofocusing control system makes a position of focusing spot follow for itself a displacement of an information medium. In the autofocusing control system, a single mode semiconductor laser is excited in a multi oscillation mode by returning part of a reflected light beam from the information medium, and a focusing lens having chromatic aberration is used which focuses a laser beam from the semiconductor laser onto a different position along the optical axis of the lens in association with a different laser wavelength.
摘要翻译：自动对焦控制系统使得聚焦点的位置本身跟随信息介质的位移。在自动对焦控制系统中，通过使来自信息介质的一部分反射光束返回到多重振荡模式中，单模半导体激光器被激发，并且使用具有色差的聚焦透镜，其将来自半导体激光器的激光束聚焦到与不同激光波长相关联的沿着透镜的光轴的不同位置。

19. 发明授权

US4985616A Optical card having optical grooves for access and wobbled marks for tracking and a recording-reproducing apparatus therefor 失效
标题翻译：具有用于访问的光学凹槽和用于跟踪的摆动标记的光学卡及其记录再现装置
公开(公告)号：US4985616A
公开(公告)日：1991-01-15
申请号：US153003
申请日：1988-02-08
申请人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
发明人： Shigeru Nakamura , Yoshito Tsunoda , Takeshi Maeda
IPC分类号： G11B7/24 , G11B7/00 , G11B7/0033 , G11B7/004 , G11B7/007 , G11B7/09
CPC分类号： G11B7/0033 , G11B7/00745 , G11B7/0938
摘要： An optical card of the present invention has a card-shaped recording layer whose optical characteristic is varied by a laser beam applied thereon, and a resin layer for protecting this recording layer. The recording layer has optical grooves provided at a substantially equal interval in the opposite end portions of the recording layer respectively and varying the light intensity of the laser beam when the beam traverses the grooves, and first and second optical markers provided at a prescribed interval in the direction of extension of each of the optical grooves and varying the light intensity of the laser beam which passes them. The optical grooves are made longer every prescribed number thereof than others, and the longer optical grooves are used for zone access, while the shorter optical grooves are used for track access in a zone. The first and second optical markers are provided at positions deviated alternately at equal distance from the center of a track, and operate as so-called wobble pits to detect a track error. These markers are used also as timing marks for generating a clock signal.
摘要翻译：本发明的光卡具有通过施加激光的光学特性而变化的卡状记录层和用于保护该记录层的树脂层。记录层具有分别在记录层的相对端部设置大致相等的间隔的光学槽，并且当光束横过槽时改变激光束的光强度，以及以规定间隔设置的第一和第二光学标记每个光学凹槽的延伸方向和改变通过它们的激光束的光强度。光槽比其他规定的数量更长，并且较长的光槽用于区域访问，而较短的光槽用于区域中的轨道通道。第一和第二光学标记设置在与轨道的中心相等的距离处交替地偏离的位置，并且作为所谓的摆动坑进行操作以检测轨道误差。这些标记也用作产生时钟信号的定时标记。

20. 发明授权

US4807210A Optical information processing apparatus 失效
标题翻译：光信息处理装置
公开(公告)号：US4807210A
公开(公告)日：1989-02-21
申请号：US71183
申请日：1987-07-08
申请人： Toshimitsu Kaku , Kazuo Shigematsu , Yoshito Tsunoda , Takeshi Maeda
发明人： Toshimitsu Kaku , Kazuo Shigematsu , Yoshito Tsunoda , Takeshi Maeda
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/09 , G11B7/30 , G11B11/105 , G11B19/04 , G11B27/19 , G11B27/30
CPC分类号： G11B27/19 , G11B11/10517 , G11B11/10576 , G11B11/10595 , G11B19/04 , G11B27/3027 , G11B7/0901 , G11B7/0938 , G11B2220/20
摘要： An optical information processing apparatus uses an optical disk having correction marks such as mirror surfaces or wobbled pits intermittently arranged along a guide track. In a reproduce mode, tracking control is effected by correcting a tracking signal by a tracking offset component detected by the correction marks. In a record or erase mode, the track offset correction is deactivated and record or erase operation is controlled in accordance with an output level of the detected track offset component so that incomplete eraser of recorded data is prevented.
摘要翻译：光学信息处理设备使用具有诸如镜面的校正标记的光盘或沿着导轨间歇地布置的摆动凹坑。在再现模式中，通过由校正标记检测到的跟踪偏移分量来校正跟踪信号来实现跟踪控制。在记录或擦除模式中，轨道偏移校正被禁用，并且根据检测到的轨道偏移分量的输出电平来控制记录或擦除操作，从而防止记录数据的不完整的橡皮擦。

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