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公开(公告)号：US4328506A
公开(公告)日：1982-05-04
申请号：US216974
申请日：1980-12-16
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/125 , G11B7/126 , G01D15/14
CPC分类号： G11B7/126 , G11B7/0045
摘要： In an optical recording device in which the writing laser light beam is focused to a small spot on a disk which is coated with a photosensitive medium and spins at a predetermined velocity so that the data are recorded in terms of variable density or surface irregularities, the forward DC current applied to a semiconductor laser is varied depending upon the radius position of the writing laser beam spot on the disk but the AC current which is superposed on the DC current and rises or drops above or below the DC current level by a predetermined amplitude depending upon the data to be recorded is maintained constant regardless of the radius position of the writing laser beam spot, whereby the duty ratio can be maintained constant regardless of the distance from the center of the disk of a selected recording track.
摘要翻译： 在其中写入激光束被聚焦到被光敏介质涂覆并以预定速度旋转以便以可变密度或表面不规则形式记录数据的盘上的小斑点的光学记录装置中， 施加到半导体激光器的正向直流电流根据盘上写入激光束点的半径位置而变化，而是叠加在直流电流上的交流电流并且上升或下降到高于或低于直流电流水平预定振幅 取决于要记录的数据，与写入激光束点的半径位置无关地保持恒定，从而占空比可以保持恒定，而与所选择的记录轨道的盘的中心的距离无关。
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公开(公告)号：US4420828A
公开(公告)日：1983-12-13
申请号：US216272
申请日：1980-12-15
IPC分类号： G11B7/00 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/09 , G11B7/12 , G11B17/34 , G11B27/10 , G11B27/30 , G11B21/02
CPC分类号： G11B17/34 , G11B27/105 , G11B27/3027 , G11B7/005 , G11B7/007 , G11B7/0901 , G11B7/12 , G11B2220/20
摘要： An optical reproducing device for reproducing still image signals recorded on circular tracks and moving image or audio signals recorded on spiral tracks on a disk. Concentric and spiral tracks may be intermingled on the same disk. The address signals for each concentric track or each coil of a spiral track are previously recorded. When the address signals are reproduced, they are processed so as to detect whether the readout address signals changes with time, thereby detecting whether the accessed track is concentric or spiral. An optical head drive system is controlled in a manner depending on whether the track is circular or spiral, so that an optical head can scan the desired concentric or spiral track.
摘要翻译： 一种用于再现记录在圆形轨道上的静止图像信号和记录在盘上的螺旋形轨道上的运动图像或音频信号的光学再现装置。 同心和螺旋轨道可能混在同一盘上。 预先记录螺旋轨迹的每个同心轨迹或每个线圈的地址信号。 当再现地址信号时，对它们进行处理，以检测读出的地址信号是否随时间变化，从而检测所访问的轨道是同心还是螺旋。 以取决于轨道是圆形还是螺旋形的方式控制光头驱动系统，使得光学头可以扫描所需的同心或螺旋形轨道。
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3.发明授权Servo control system for optical system which focuses a converging light beam on a recording disc 失效用于将会聚光束聚焦在记录盘上的光学系统的伺服控制系统
公开(公告)号：US4368526A
公开(公告)日：1983-01-11
申请号：US229313
申请日：1980-12-23
CPC分类号： G11B7/085 , G11B7/0909
摘要： A servo control system includes an error amplifier for deriving an error signal representing the displacement of a focus point of laser beam from different planes of an optical record disc, a differentiator for differentiating the error signal to detect its rate of variation, and a comparator for detecting the maximum peak of the differentiated signal which corresponds to reflections from the plane on which information is recorded. The focus point is moved in a direction toward the disc in an open loop mode until the maximum peak of the differentiated signal is detected, whereupon the focus point is controlled in response to the error signal in a closed loop mode to keep track of the recording plane.
摘要翻译： 伺服控制系统包括误差放大器，用于导出表示来自光学记录盘的不同平面的激光束的聚焦点的位移的误差信号，用于区分误差信号以检测其变化率的微分器，以及用于 检测对应于记录有信息的平面的反射的微分信号的最大峰值。 焦点在开环模式中朝向盘的方向移动，直到检测到微分信号的最大峰值，于是响应于闭环模式中的误差信号来控制对焦点以跟踪记录 飞机
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公开(公告)号：US4385303A
公开(公告)日：1983-05-24
申请号：US254276
申请日：1981-04-15
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。
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公开(公告)号：US4272651A
公开(公告)日：1981-06-09
申请号：US33005
申请日：1979-04-24
申请人： Tomio Yoshida , Yoshinobu Nakata , Shunji Harigae , Toshio Sato
发明人： Tomio Yoshida , Yoshinobu Nakata , Shunji Harigae , Toshio Sato
CPC分类号： G11B7/1398 , G11B7/085 , G11B7/1378
摘要： An optical system for an optical data recording and reproducing apparatus such as an optical video disc apparatus comprising a diode laser light source, a condenser lens disposed adjacent to the diode laser, a cylindrical lens assembly arranged to exhibit different magnifications to light beams emitted by the diode laser in the direction perpendicular to a junction plane thereof and in the direction parallel to the junction plane, and a concentrating lens for constricting the resulting light beam into a light spot of a small size for projection on a recording medium. Recording of information is attained by the constricted light beam of a substantially circular cross-section with a high recording density at a low energy consumption. When reproducing the recorded information, the constricted beam is laterally enlarged in the transverse direction of the information recording track thereby to assure generation of a signal utilized for tracking control.
摘要翻译： 一种用于光学数据记录和再现装置的光学系统，例如包括二极管激光光源的光学数据记录和再现装置，与二极管激光器相邻设置的聚光透镜;柱面透镜组件，被布置成对由 二极管激光器在垂直于其结面的方向上并且在平行于接合面的方向上的聚光透镜，以及用于将所得到的光束收缩到小尺寸的光点以用于在记录介质上投影的聚光透镜。 通过在低能量消耗下具有高记录密度的大致圆形横截面的收缩光束来获得信息的记录。 当再现所记录的信息时，缩小的光束在信息记录磁道的横向方向上横向放大，从而确保产生用于跟踪控制的信号。
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6.发明授权Light source intensity control in an optical recording and reproducing apparatus 失效光学记录和再现装置中的光源强度控制
公开(公告)号：US4426693A
公开(公告)日：1984-01-17
申请号：US288915
申请日：1981-07-31
申请人： Isao Satoh , Tomio Yoshida , Shunji Harigae , Kenji Koishi
发明人： Isao Satoh , Tomio Yoshida , Shunji Harigae , Kenji Koishi
CPC分类号： G11B7/126 , G11B17/005 , G11B7/0045 , G11B7/0938
摘要： An optical information recording and reproducing apparatus for optically recording and reproducing information on and from a disk-shaped information carrier having a guide track is disclosed. A digital track address prerecorded on the guide track is reproduced and the intensity of a recording laser beam is controlled by the reproduced digital track address so that the exposures of the recording laser beam at an inner periphery and an outer periphery of the disk-shaped information carrier rotated at a constant rotation speed are corrected to enable an optimum recording over an entire surface of the disk-shaped information carrier.
摘要翻译： 公开了一种用于在具有导轨的盘形信息载体上光学记录和再现信息的光学信息记录和再现装置。 在导轨上预先记录的数字轨道地址被再现，并且记录激光束的强度由再现的数字轨道地址控制，使得记录激光束在盘形信息的内周和外周处的曝光 校正以恒定转速旋转的载体，以使得能够在盘形信息载体的整个表面上进行最佳记录。
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公开(公告)号：US4523304A
公开(公告)日：1985-06-11
申请号：US368361
申请日：1982-04-14
申请人： Isao Satoh , Tomio Yoshida , Shunji Harigae , Kenji Koishi
发明人： Isao Satoh , Tomio Yoshida , Shunji Harigae , Kenji Koishi
IPC分类号： G11B7/007 , G11B7/013 , G11B17/00 , G11B20/12 , G11B20/14 , G11B27/19 , G11B27/30 , G11B7/00
CPC分类号： G11B20/1217 , G11B17/005 , G11B20/1419 , G11B20/1426 , G11B27/19 , G11B27/3027 , G11B7/007 , G11B7/013 , G11B2020/10888 , G11B2220/2537
摘要： A modulation and demodulation system for an optical data recording and reproducing apparatus is disclosed in which, in an optical disc having an optical guide track and capable of recording and reproducing optically, the guide track is divided into a plurality of data sectors and the recording or reproduction or reading is effected by data sector. The modulation system for the data field for recording the data is different from that for the identification field containing identification data such as a track address and a sector address in such a way that the identification field is reproduced at high reliability and high demodulation speed while at the same time recording data at high density in the data field.
摘要翻译： 公开了一种用于光学数据记录和再现装置的调制和解调系统，其中在具有光导轨道并能够光学记录和再现的光盘中，导轨被分成多个数据扇区，并且记录或 复制或阅读由数据部门进行。 用于记录数据的数据场的调制系统与包含诸如轨道地址和扇区地址之类的识别数据的识别场的调制系统不同，使得识别场以高可靠性和高解调速度再现，同时在 同时在数据字段中以高密度记录数据。
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8.发明授权
公开(公告)号：US4484319A
公开(公告)日：1984-11-20
申请号：US301420
申请日：1981-09-11
申请人： Kenji Koishi , Tomio Yoshida , Isao Satoh , Shunji Harigae
发明人： Kenji Koishi , Tomio Yoshida , Isao Satoh , Shunji Harigae
CPC分类号： G11B7/0953 , G11B7/08541
摘要： A track searching system for an optical information recording and reproducing apparatus in which a disc-like information carrier provided with concentric or spiral guide tracks of a channel-like configuration is used as an information recording and storing means and adapted to be scanned by a light beam for recording or retrieval of information. Light flux reflected by the information carrier and presenting variable distribution of light intensity is received by paired photoelectric elements. A difference signal and a sum signal derived from the output signals from the photoelectric elements or a reproduced RF signal representative of reproduced information undergo phase comparison processing, the result of which is utilized for determining the direction and number of guide tracks traversed by the scanning light beam. A desired track is searched and accessed with high accuracy at a high speed for assuring a positive and rapid information recording or retrieval at the desired track regardless of eccentricity of the information carrier, variations in the scanning speed, and the presence or absence of a recorded track.
摘要翻译： 一种用于光信息记录和再现装置的轨道搜索系统，其中将具有通道状结构的同心或螺旋导轨的盘状信息载体用作信息记录和存储装置，并且适于被光扫描 光束用于记录或检索信息。 由信息载体反射的光通量和呈现光强的可变分布由成对的光电元件接收。 来自光电元件的输出信号的差分信号和和信号或表示再现信息的再生RF信号进行相位比较处理，其结果用于确定由扫描光穿过的导轨的方向和数量 光束。 以高速度高精度地搜索和访问期望的轨道，以确保在期望的轨道上的正和快速的信息记录或检索，而不管信息载体的偏心，扫描速度的变化以及是否存在记录的 跟踪。
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