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公开(公告)号：US5216652A
公开(公告)日：1993-06-01
申请号：US824600
申请日：1992-01-23
申请人： Junichi Yoshio , Yoshitaka Shimoda
发明人： Junichi Yoshio , Yoshitaka Shimoda
CPC分类号： G11B7/0903
摘要： A light spot position detector reliably effects spot-on-track detection even if the reflectivities of recording tracks and intertrack areas of an optical disk are substantially the same as each other. A tracking error signal used to control a scanning spot applied to the recording tracks on the optical disk is produced by mixing light spot position signals that are generated according to the three beam method and the push pull method from light beams reflected from light spots on the signal recording surface of the optical disk.
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2.发明授权Actuator position detector, actuator position controller and track search controller 失效执行器位置检测器，执行器位置控制器和轨迹搜索控制器
公开(公告)号：US5341353A
公开(公告)日：1994-08-23
申请号：US102111
申请日：1993-08-04
申请人： Junichi Yoshio , Yoshitaka Shimoda
发明人： Junichi Yoshio , Yoshitaka Shimoda
CPC分类号： G11B7/08517 , G11B7/0903 , G11B7/0941
摘要： A track search controller has three two-segment photodetectors, three subtracters associated respectively with the two-segment photodetectors, a processing circuit, and a servo control cirucit. Each of the photodetectors produces two output signals based on a light beam reflected from an optical disk. Each of the subtracters produces a differential output signal representing the difference between the output signals from the associated photodetector. The processing circuit generates an actuator position signal from the output signals from the subtracters. The actuator position signal contains a component indicative of a deviation of the actuator due to its vibration. The servo control circuit controls an actuator, which actuates a laser beam source, so that the actuator position signal will be of a constant value.
摘要翻译： 的轨道搜索控制器具有三个两段式光检测器，分别与所述两个段光电检测器，一个处理电路，以及一个伺服控制cirucit相关联的三个减法器。 每个光电检测器的基于从光盘反射的光束的两个输出信号。 每一减法器产生代表从相关联的光电检测器的输出信号之差的差分输出信号。 处理电路根据来自减法器的输出信号产生致动器位置信号。 致动器位置信号包含指示致动器由于其振动的偏差的分量。 伺服控制电路控制致动器，其致动激光束源，使致动器位置信号为恒定值。
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公开(公告)号：US06292448B1
公开(公告)日：2001-09-18
申请号：US09360903
申请日：1999-07-26
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/24085
摘要： Before information is recorded onto an information record medium by irradiating a light beam, a test signal is recorded for each of a plurality of unit test record regions with a plurality of different record powers. Then, the test signal recorded in each of the unit test record regions is reproduced, and further an optimal record power for the light beam is selected on the basis of a condition of the reproduced test signal. The information recording apparatus is provided with: a re-writable memory device for storing power set values to obtain the plurality of different record powers respectively, in response to location information which identifies respective one of the unit test record regions; a recording device for recording the test signal in the test record region on the basis of a constant record clock signal; a location information generating device for generating the location information at a cycle corresponding to a record time for each of the unit test record regions; a record controlling device for reading out the power set value stored in the re-writable memory device in accordance with the generated location information and then outputting it to the recording device; a defect detecting device for detecting a defect in respective one of the unit test record regions, in which a recording operation is performed; and a power set value storing device for storing the power set value, which is read out in accordance with one location information when the defect is detected, into the re-writable memory device such that the stored power set value corresponds to another location information.
摘要翻译： 在通过照射光束将信息记录到信息记录介质之前，针对具有多个不同记录功率的多个单元测试记录区域中的每一个记录测试信号。 然后，记录在每个单元测试记录区域中的测试信号被再现，并且还根据再现的测试信号的条件选择光束的最佳记录功率。 信息记录装置具有：响应于识别单元测试记录区域中的相应一个的位置信息，分别存储功率设定值以获得多个不同记录功率的可重写存储装置; 记录装置，用于根据恒定的记录时钟信号在测试记录区中记录测试信号; 位置信息生成装置，用于以对应于每个单位测试记录区域的记录时间的周期生成位置信息; 记录控制装置，用于根据生成的位置信息读出存储在可重写存储装置中的功率设定值，然后将其输出到记录装置; 用于检测执行记录操作的单元测试记录区域中的一个的缺陷的缺陷检测装置; 以及功率设定值存储装置，用于存储在检测到缺陷时根据一个位置信息读出的功率设定值，使得存储的功率设定值对应于另一个位置信息。
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公开(公告)号：US06894955B1
公开(公告)日：2005-05-17
申请号：US09675059
申请日：2000-09-29
CPC分类号： G11B7/1353 , G11B7/08517 , G11B7/08529 , G11B7/08541 , G11B7/0903 , G11B7/094 , G11B7/0953 , G11B7/0956
摘要： There are provided an information write device and an information read device enabling to generate highly accurate contrast signals. When a main light spot Pc is located at the center of the a groove G, the light spot Pc and sub light spots Psa, Psb are each adapted to radiate a disc DSC such that the sub light spots Psa, Psb radiate positions displaced from the center of the land L. The reflected beams of light from the disc DSC caused by the radiation with the light spots Pc, Psa, Psb are detected to generate push-pull signals each corresponding to the light spots Pc, Psa, Psb, respectively, in accordance with each of the detected signals. Furthermore, a signal to be obtained by amplifying an addition signal, given by adding the push-pull signals each corresponding to the sub light spots Psa, Psb, with a predetermined amplification factor K/n, and a push-pull signal corresponding to the main light spot Pc are added to thereby generate a contrast signal.
摘要翻译： 提供了一种能够产生高精度对比度信号的信息写入装置和信息读取装置。 当主光斑Pc位于凹槽G的中心时，光斑Pc和次光斑Psa，Psb各自适于辐射盘DSC，使得副光斑Psa，Psb辐射位置从 检测由具有光斑Pc，Psa，Psb的辐射引起的来自光盘DSC的反射光束，以产生分别对应于光点Pc，Psa，Psb的推挽信号， 根据每个检测到的信号。 此外，通过以预定的放大系数K / n加上每个与子光点Psa，Psb相对应的推挽信号给出的相加信号的放大而获得的信号和对应于 添加主光点Pc，从而生成对比度信号。
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5.发明授权Optical pickup for performing recording or reading operation on recording medium having prepits 有权用于在具有预凹坑的记录介质上执行记录或读取操作的光学拾取器公开(公告)号：US06577565B1
公开(公告)日：2003-06-10
申请号：US09348124
申请日：1999-07-02
IPC分类号： G11B7095
CPC分类号： G11B7/1356 , G11B7/005 , G11B7/0909
摘要： An optical pickup for reading information from a recording medium having a plurality of prepits or for recording information onto the recording medium is provided. The optical pickup includes: a light emitting device for emitting a light beam to the recording medium; a dividing device for dividing the light beam reflected by the recording medium into a first divided beam and a second divided beam; an astigmatism producing device for producing astigmatism in the first divided beam; a first light receiving device for receiving the first divided beam from the astigmatism producing device; and a second light receiving device for receiving the second divided beam from the dividing device.
摘要翻译： 提供一种用于从具有多个预凹坑的记录介质读取信息或用于将信息记录到记录介质上的光学拾取器。 光拾取器包括：用于向记录介质发射光束的发光装置; 用于将由记录介质反射的光束划分成第一分割光束和第二分割光束的分割装置; 用于在第一分割光束中产生像散的散光产生装置; 第一光接收装置，用于从散光产生装置接收第一划分光束; 以及用于从分割装置接收第二分割光束的第二光接收装置。
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6.发明授权Code judging apparatus and method, record medium judging apparatus and method, and information recording apparatus and method 失效代码判断装置和方法，记录介质判断装置和方法以及信息记录装置和方法公开(公告)号：US06728181B2
公开(公告)日：2004-04-27
申请号：US09749177
申请日：2000-12-28
IPC分类号： G11B700
CPC分类号： G11B23/284 , G11B7/0037 , G11B7/00736 , G11B20/00094 , G11B20/0021 , G11B23/0042
摘要： A code judging apparatus is provided with: a detecting device (11) for optically detecting an information code including at least identification information to individually identify a writable record medium (DK), in which record information can be written, from the writable record medium to thereby output an output signal; a moving device (19) for moving the detecting device onto a set area, which is an area on the writable record medium where the information code is supposed to be recorded; and a judging device (19) for judging whether or not the information code is recorded on the writable record medium, in accordance with the output signal outputted from the detecting device moved on the set area.
摘要翻译： 代码判断装置具有：检测装置（11），用于光学地检测包括至少标识信息的信息代码，以便将可记录信息可写入的可写记录介质（DK）从可写记录介质分别识别为 从而输出输出信号; 移动装置（19），用于将检测装置移动到作为应记录信息码的可写记录介质上的区域的设定区域; 以及判断装置（19），用于根据在设定区域上移动的检测装置输出的输出信号来判断信息代码是否被记录在可写记录介质上。
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公开(公告)号：US06603726B1
公开(公告)日：2003-08-05
申请号：US09557308
申请日：2000-04-25
IPC分类号： G11B700
CPC分类号： G11B20/10009 , G11B7/0053 , G11B7/131 , G11B20/10027
摘要： A pre-pit detection unit having pre-pit detection circuits (600 and 700) respectively corresponding to beam intensity in mark and space periods that are provided in parallel on the output side of a push-pull circuit (500) for generating a pre-data signal. The pre-pit detection unit finally outputs the OR of the outputs of both pre-pit detection circuits as a pre-pit detection signal (l). An AGC circuit (601 and 701) for making the maximum amplitude of a radial push-pull signal (d) obtainable from said push-pull circuit coincide with a reference value is provided in the preceding stages of pre-pit detecting comparators (606 and 706) in the respective pre-pit detection circuits.
摘要翻译： 一种预凹坑检测单元，具有分别对应于在推挽电路（500）的输出侧并联设置的标记和空间周期中的光束强度的预凹坑检测电路（600和700） 数据信号。 预坑检测单元最终将两个预坑检测电路的输出的OR作为预凹坑检测信号（l）输出。 在前置凹坑检测比较器（606和6）中提供用于使可从所述推挽电路获得的径向推挽信号（d）的最大幅度与参考值一致的AGC电路（601和701） 706）。
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公开(公告)号：US5212675A
公开(公告)日：1993-05-18
申请号：US824602
申请日：1992-01-23
申请人： Junichi Yoshino , Yoshitaka Shimoda
发明人： Junichi Yoshino , Yoshitaka Shimoda
CPC分类号： G11B7/0903 , G11B7/08517 , G11B7/094 , G11B7/0941 , G11B7/0943
摘要： There is disclosed an apparatus for detecting position of a light spot, suitable for the tracking control or the track-jumping control at the time of reproducing an optical disk. This light spot position detector has a circuit configuration featured below. Namely, three light beams are used to provide three push-pull outputs from the respective light beams to apply a predetermined operation to those push-pull outputs, thereby to generate a light spot position signal permitting discrimination as to whether or not the light spot is in the on-track state. Further, by gain controlling the light spot position signal thus generated, a suitable signal is permitted to be outputted even when a signal is undesirably attenuated for any reason.
摘要翻译： 公开了一种用于检测在再现光盘时适用于跟踪控制或轨迹跳跃控制的光点位置的装置。 该光点位置检测器具有以下特征的电路结构。 也就是说，使用三个光束来提供来自各个光束的三个推挽输出，以对这些推挽输出施加预定的操作，从而产生光斑位置信号，以允许对光点是否为 在轨上状态。 此外，通过增益控制如此产生的光点位置信号，即使由于任何原因使信号不期望地衰减，允许输出合适的信号。
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公开(公告)号：US06480448B1
公开(公告)日：2002-11-12
申请号：US09375565
申请日：1999-08-17
申请人： Eisaku Kawano , Yoshitaka Shimoda , Hidehiro Ishii , Eiji Muramatsu , Masahiro Kato , Kunihiko Horikawa
发明人： Eisaku Kawano , Yoshitaka Shimoda , Hidehiro Ishii , Eiji Muramatsu , Masahiro Kato , Kunihiko Horikawa
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/0045
摘要： In a disc player, a CAL pattern is recorded in a disc-like optical recording medium during a recording stand-by time period, which is yielded by a difference between a data rate in inputting information to a disc player 50 and a recording rate in recording information into the optical recording medium. The CAL pattern is reproduced from the optical recording medium, the reproduced pattern is evaluated, and an irradiation intensity of a laser beam is optimized for recording information in the optical recording medium, by a laser-output controller 30.
摘要翻译： 在光盘播放器中，在记录待机时间段期间，在盘状光学记录介质中记录CAL图案，其由输入到盘播放器50的信息的数据速率与记录速率之间的差异而产生 将信息记录到光学记录介质中。 通过激光输出控制器30，从光学记录介质再现CAL图案，评估再现图案，并优化激光束的照射强度以记录在光学记录介质中的信息。
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公开(公告)号：US06442115B1
公开(公告)日：2002-08-27
申请号：US09386338
申请日：1999-08-31
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/0045 , G11B19/28
摘要： An information recording apparatus (S) records record information onto an optical disc (1), which corresponds to a CLV (Constant Linear Velocity) method to keep a linear velocity of the optical disc constant when reproducing the record information from the optical disc. The information recording apparatus is provided with: an optical pickup (14) having a laser (14a) for irradiating a light beam (B) from the laser onto a record track of the optical disc and for detecting a reflected light from the optical disc; a rotation controlling device (11, 17 to 20) for rotation-controlling the optical disc to keep a rotation angular velocity of the optical disc constant when recording the record information onto the optical disc; and a laser drive controlling device (11, 15, 16) for obtaining an optimum value of a laser driving amount for the optical pickup in correspondence with a linear velocity of the record track of the rotation-controlled optical disc with respect to the optical pickup and for drive-controlling the laser by use of the obtained optimum value of the laser driving amount.
摘要翻译： 信息记录装置（S）将记录信息记录到光盘（1）上，该记录信息对应于当从光盘再现记录信息时保持光盘的线速度恒定的CLV（恒定线速度）方法。 信息记录装置具有：具有用于将来自激光的光束（B）照射到光盘的记录轨道上并用于检测来自光盘的反射光的激光器的光学拾取器（14）; 旋转控制装置（11,17至20），用于当将记录信息记录在光盘上时，旋转控制光盘以保持光盘的旋转角速度恒定; 以及激光驱动控制装置（11,15,16），用于根据旋转控制光盘的记录轨道相对于光学拾取器的线速度获得用于光学拾取器的激光驱动量的最佳值 并且通过使用获得的激光驱动量的最佳值来驱动控制激光。
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