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公开(公告)号：US4761774A
公开(公告)日：1988-08-02
申请号：US866584
申请日：1986-05-23
CPC分类号： G11B7/135 , G11B7/08576 , G11B7/0941
摘要： An optical disc drive apparatus has a remarkably improved track accessing ability in comparison with conventional like apparatus. On a base are provided an optical system having a light emitting element and a light sensing element, as well as an optical path deflecting element which performs a precision tracking. Further, an objective lens and a light guide element are provided on a rotating element which performs track seek and rough tracking. The light guide element comprises two reflecting members which are opposed in parallel with each other.
摘要翻译： 与传统的类似装置相比，光盘驱动装置具有显着改进的轨道存取能力。 在基座上设置有具有发光元件和感光元件的光学系统，以及执行精密跟踪的光路偏转元件。 此外，物镜和导光元件设置在执行轨迹追踪和粗略跟踪的旋转元件上。 光导元件包括彼此平行地相对的两个反射部件。
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2.发明授权公开(公告)号：US06735160B1
公开(公告)日：2004-05-11
申请号：US09609317
申请日：2000-06-30
IPC分类号： G11B700
CPC分类号： G11B20/0021 , G11B7/24085 , G11B20/00086 , G11B20/00166 , G11B20/00586 , G11B20/1403
摘要： An optical disc recording apparatus records a digital content onto an optical disc so that the perfect copying of the digital content is difficult without proper authorization. The optical disc recording apparatus includes a formatter for generating a channel signal corresponding to primary digital information, a secret key storing unit for prestoring secondary digital information, a pseudo random number generator for generating a pseudo random number series, an XOR for logically inverting the pseudo random number series according to each bit of the secondary digital information, a PE modulator for generating a PE modulation signal according to the logically inverted pseudo random number series, a phase modulator for modulating the phase of each edge of the channel signal by a fixed slight time according to the value of the PE modulation signal, and a recording channel for forming recording marks on a DVD according to the modulated channel signal.
摘要翻译： 光盘记录装置将数字内容记录到光盘上，使得在没有适当授权的情况下数字内容的完美复制是困难的。 光盘记录装置包括用于产生对应于主数字信息的信道信号的格式器，用于预存次数字信息的秘密密钥存储单元，用于产生伪随机数序列的伪随机数发生器，用于逻辑反转伪随机数序列的伪异或 根据第二数字信息的每一位的随机数序列，用于根据逻辑反相伪随机数序列产生PE调制信号的PE调制器，用于通过固定的微调对通道信号的每个边沿的相位进行调制的相位调制器 根据PE调制信号的值的时间，以及根据调制信道信号在DVD上形成记录标记的记录通道。
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3.发明授权Apparatus for deriving synchronizing signal from pre-formed marks on record carrier 失效用于从记录载体上预先标记的信号中导出同步信号的装置
公开(公告)号：US5088080A
公开(公告)日：1992-02-11
申请号：US556257
申请日：1990-07-19
CPC分类号： G11B20/1403 , G11B27/19 , G11B27/3027 , G11B7/00745 , G11B7/0901 , G11B7/24 , G11B2020/10916
摘要： Pairs of synchronizing marks are formed on a record carrier periodically. At least one of the marks in every pair is located away from a track center line on which information data are to be recorded. Those marks are recovered by a reading head and fed to a phase lock loop in order to minimize phase error of synchronization. The phase lock loop produces a pair of synchronizing signals so as to derive a phase error signal from either of the marks. Therefore, continual phase error signal for the phase lock operation is obtained even when the reading head locates away from the track center line. Accordingly, stability of the synchronization will be improved.
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4.发明授权Focus detection system for an optical disk drive using photo sensor elements in the far field of information pits 失效在远场信息坑中使用光电传感器元件的光盘驱动器的焦点检测系统
公开(公告)号：US4998235A
公开(公告)日：1991-03-05
申请号：US272054
申请日：1988-11-14
IPC分类号： G11B7/09
CPC分类号： G11B7/0908 , G11B7/0917
摘要： An apparatus is described for reading/writing an optical recording carrier, which have information pits aligned in a track. In order to get a focus error signal, the apparatus has two pairs of photo sensor elements, two phase detection circuits for the two pairs of photo sensor elements, and an adder circuit for adding outputs of the two phase detection circuits. The elements are placed symmetrically about an optical axis in a far field area of the pits.
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公开(公告)号：US5016258A
公开(公告)日：1991-05-14
申请号：US363987
申请日：1989-06-09
IPC分类号： H03M5/14
CPC分类号： H03M5/145
摘要： A digital modulator converts M-bit data words to N-bit code words (N>M) each containing a specific number of bits `1`. The specific number is one of a plurality of predetermined numbers which are different by at least 3 from one another. A specific data word may be converted to either one of two code words having different numbers of bits `1` from each other so as to reduce DC components of a channel code constituted by the code words.
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公开(公告)号：US5008669A
公开(公告)日：1991-04-16
申请号：US383153
申请日：1989-07-19
CPC分类号： G11B20/1426
摘要： A system for encoding/decoding an 8-bit binary code into/from a 4/11 channel code is disposed such that an 8-bit binary code is encoded into a 11-bit channel code by adding a 3-bit extension code as a parity code which keeps the number of "1"s in the channel code at four. When the 8-bit binary code cannot be encoded by this rule, it is converted to a temporary 8-bit code by a table encoder and then a 3-bit extension code is added. The 4/11 channel code is decoded referring to the 3-bit extension code, which indicates the encoding rule by which the 4/11 channel code has been generated. When the 4/11 channel code is detected to have been encoded by the bits-adding rule, an original 8-bit binary code is derived from the 4/11 code by removing the 3-bit extension code. When the 4/11 channel code has been encoded by the table-encoding rule, it is decoded by a table decoder.
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7.发明授权
公开(公告)号：US4823334A
公开(公告)日：1989-04-18
申请号：US935309
申请日：1986-11-26
CPC分类号： G11B7/1376
摘要： An optical head for a recording/reproducing apparatus optically recording and/or reading information onto or from a recording medium, collimates a divergent light beam radiated from a light source into a parallel light beam using a collimator lens comprised of the first and second lenses. Collimation can precisely be adjusted by adjusting only the position of second lens. The first lens is a positive lens. The second lens has a power less than the total power of the collimator lens. Collimation adjustment can be done with extreme accuracy even when disposing a prism in the path of the parallel light beam.
摘要翻译： 用于在记录介质上或从记录介质读取信息的记录/再现设备的光学头将使用由第一和第二透镜构成的准直透镜将从光源辐射的发散光束准直成平行光束。 准直可以通过调整第二个镜头的位置来精确调整。 第一个镜头是正镜头。 第二透镜的功率小于准直透镜的总功率。 即使在平行光束的路径中设置棱镜，也可以极高精度进行准直调整。
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8.发明授权Disc-shaped recording medium disc driving device and method and apparatus for producing disc 有权盘形记录介质盘驱动装置及其制造方法和装置公开(公告)号：US07123557B2
公开(公告)日：2006-10-17
申请号：US10450459
申请日：2002-10-10
申请人： Jacobus Petrus Josephus Heemskerk , Cornelis Marinus Schep , Aalbert Stek , Shinichi Tanaka , Hiromichi Ishibashi , Shigeru Furumiya , Hiroshi Ogawa , Tamotsu Yamagami , Shoei Kobayashi
发明人： Jacobus Petrus Josephus Heemskerk , Cornelis Marinus Schep , Aalbert Stek , Shinichi Tanaka , Hiromichi Ishibashi , Shigeru Furumiya , Hiroshi Ogawa , Tamotsu Yamagami , Shoei Kobayashi
IPC分类号： G11B15/52
CPC分类号： G11B27/3027 , G11B7/00 , G11B7/24082 , G11B20/1217 , G11B20/1403 , G11B27/19 , G11B27/24 , G11B2020/1239 , G11B2020/1265 , G11B2020/1268 , G11B2020/1272 , G11B2020/1287 , G11B2020/1298 , G11B2220/213 , G11B2220/218 , G11B2220/235 , G11B2220/2541
摘要： The information such as address is to be efficiently formed into wobble components and further the S/N ratio in reproducing the information formed into the wobble components is to be improved. In an optical disc of the present invention, there are recorded in a wobble the address information modulated in accordance with the MSK (minimum shift keying) system and the address information modulated in accordance with a modulation system in which even harmonics signals are added to a sinusoidal carrier signal and in which the polarity of the harmonics signal is changed depending on the sign of the data for modulation.
摘要翻译： 要将地址等信息有效地形成为摆动分量，并且进一步提高复制形成为摆动分量的信息时的S / N比。 在本发明的光盘中，按照MSK（最小移动键控）系统调制的地址信息和根据调制系统调制的地址信息，摆动了一个调制系统，其中偶数谐波信号被加到一个 正弦载波信号，其中谐波信号的极性根据用于调制的数据的符号而改变。
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9.发明授权Recording medium, a method for producing the same, a control method using the recording medium, and a recording/reproducing apparatus using the recording medium 失效记录介质，其制造方法，使用记录介质的控制方法以及使用记录介质的记录/再现装置
公开(公告)号：US5815485A
公开(公告)日：1998-09-29
申请号：US703859
申请日：1996-08-27
IPC分类号： G11B5/012 , G11B5/55 , G11B5/596 , G11B7/007 , G11B7/013 , G11B7/085 , G11B7/09 , G11B9/06 , G11B21/08 , G11B27/19 , G11B27/24 , G11B27/30 , G11B7/00
CPC分类号： G11B9/062 , G11B21/083 , G11B21/085 , G11B27/19 , G11B27/24 , G11B27/3027 , G11B5/5526 , G11B5/59655 , G11B7/00745 , G11B7/0938 , G11B2220/20 , G11B5/012 , G11B7/08535 , G11B7/0901 , G11B7/24085 , G11B9/06
摘要： A disk-shaped recording medium includes a plurality of first tracks and a plurality of second tracks for recording data, the first track and the second track being alternately arranged in the radial direction on the surface of the recording medium in one of a pattern of concentric circles and a spiral pattern; a plurality of first servo areas and a plurality of second servo areas discretely located at a plurality of respective specified rotation angular positions of the surface along the circumferential direction of the recording medium; and a plurality of first servo marks and a plurality of second servo marks used for tracking control. The first servo marks are provided in the first servo areas along each of the first tracks, and the servo marks are provided in the second servo areas along each of the second tracks.
摘要翻译： 盘形记录介质包括多个第一轨道和多个用于记录数据的第二轨道，第一轨道和第二轨道以同心的方式以记录介质的表面沿径向交替布置在记录介质的表面上 圆圈和螺旋图案; 多个第一伺服区域和多个第二伺服区域，离散地位于沿着记录介质的圆周方向的表面的多个指定的旋转角位置处; 以及用于跟踪控制的多个第一伺服标记和多个第二伺服标记。 第一伺服标记设置在沿着每个第一轨道的第一伺服区域中，并且伺服标记设置在沿着每个第二轨道的第二伺服区域中。
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10.发明授权
公开(公告)号：US5031167A
公开(公告)日：1991-07-09
申请号：US356368
申请日：1989-05-24
IPC分类号： G11B7/09
CPC分类号： G11B7/0917 , G11B7/0908
摘要： An apparatus is described for recording/reproducing to/from an optical record carrier by means of a laser light beam. The record carrier has pre-recorded sarvo marks aligned in a track. In order to get a focus error signal, the apparatus measures phase difference between signals from two photo sensor elements which receive the laser light beam through the record carrier. A circuit for measuring the phase difference has a first and a second phase shift circuits, RS flip-flops and a focus error converter which has a shift register and a low-pass filter. The signals from the photo sensor elements are fed to the first and second phase shift circuits, respectively. The second phase shift circuit is composed of a plurality of delay elements, output of which are fed to the S inputs of the RS flip-flops. Data at the S inputs are latched in response to an output signal of the first phase shift circuit which is fed to R inputs of the RS flip-flops. Latched data are fed to the shift register for converting to a serial signal. The serial signal, then, is low-pass-filtered to become a focus error signal.
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