-
公开(公告)号：US4523089A
公开(公告)日：1985-06-11
申请号：US411809
申请日：1982-08-26
IPC分类号： G11B7/125 , H01S5/068 , H01S5/0683 , G01J1/32 , H01S3/10
CPC分类号： H01S5/06835
摘要： A driving circuit for driving a semiconductor laser by a driving signal containing a pulse signal representing given information and superposed on a DC bias signal includes means for monitoring intensity of laser light emitted when the DC bias is applied, and means for monitoring the intensity of laser light emitted when the pulse signal is applied. The DC bias signal and the pulse signal are varied in dependence on the result of comparisons between the outputs of the monitoring means and respective predetermined reference values.
摘要翻译： 用于通过包含表示给定信息并叠加在DC偏置信号上的脉冲信号的驱动信号驱动半导体激光器的驱动电路包括用于监视施加DC偏压时发射的激光的强度的装置，以及用于监视激光强度的装置 当施加脉冲信号时发出光。 DC偏置信号和脉冲信号根据监视装置的输出与相应的预定参考值之间的比较结果而变化。
-
公开(公告)号：US4554652A
公开(公告)日：1985-11-19
申请号：US490165
申请日：1983-04-29
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。
-
公开(公告)号：US4563760A
公开(公告)日：1986-01-07
申请号：US401020
申请日：1982-07-22
申请人： Takeshi Maeda , Kazuo Shigematsu , Masahiro Takasago , Yasumitsu Mizoguchi , Zenji Tsutsumi , Yoshito Tsunoda , Motoo Uno
发明人： Takeshi Maeda , Kazuo Shigematsu , Masahiro Takasago , Yasumitsu Mizoguchi , Zenji Tsutsumi , Yoshito Tsunoda , Motoo Uno
CPC分类号： G11B7/08 , G11B7/09 , G11B7/0901 , G11B7/0941
摘要： A method of detecting a light spot control signal is disclosed in which, when information is reproduced from an optical disk for optically recording information, a signal level obtained at a high-reflectivity portion of the optical disk is taken out of a signal reproduced from the optical disk, and is used as a control signal, which controls a light spot so that it tracks information stored in the optical disk.
摘要翻译： 公开了一种检测光点控制信号的方法，其中当从用于光学记录信息的光盘再现信息时，从从光盘中再现的信号中取出在光盘的高反射率部分获得的信号电平 光盘，并且被用作控制信号，其控制光点，使得其跟踪存储在光盘中的信息。
-
公开(公告)号：US4650332A
公开(公告)日：1987-03-17
申请号：US718278
申请日：1985-04-01
申请人： Koji Muraoka , Takeshi Maeda , Masahiro Takasago , Tokuya Kaneda
发明人： Koji Muraoka , Takeshi Maeda , Masahiro Takasago , Tokuya Kaneda
CPC分类号： G01D5/36
摘要： In an optical position detecting apparatus using moire, two light receiving elements are associated with a single light emitting element, and moire or grating portions of an auxiliary moire i.e., fixed sub-scale opposing the respective light receiving elements are arranged such that detection signals produced from the two light receiving elements upon movement of a movable moire i.e., main scale are substantially 180.degree. out of phase. The difference between the detection signals from the light receiving elements is used as a positioning signal, and the sum of the detection signals from the light receiving elements is used as a signal for controlling the input of the light emitting element.
摘要翻译： 在使用莫尔条纹的光学位置检测装置中，两个光接收元件与单个发光元件相关联，并且配置辅助波纹的莫尔条纹或光栅部分，即与各个光接收元件相对的固定子刻度，使得产生检测信号 来自两个光接收元件的移动可移动的莫尔条，即主刻度大致相差180度。 来自光接收元件的检测信号之间的差异用作定位信号，并且来自光接收元件的检测信号的和被用作用于控制发光元件的输入的信号。
-
公开(公告)号：US4542491A
公开(公告)日：1985-09-17
申请号：US438774
申请日：1982-11-03
CPC分类号： G11B7/08511 , G11B7/0909
摘要： An optical information disc apparatus includes a laser source, a recording medium with an information track, an optical system for emitting a laser beam from the laser source onto the information track, a photodetector detecting the focus error of the optical system using the light reflected from the information track, and an auto-focusing servo system operating the optical system to make the focus of the system follow the upward and downward movement of the recording medium, the optical information disc apparatus being further provided with a control circuit to make the auto-focusing servo system effective only when the optical system is in a position equivalent to the linear region of a defocusing signal having an S-curve characteristic.
摘要翻译： 一种光学信息盘装置，包括激光源，具有信息轨道的记录介质，用于将激光源发射到信息轨道上的激光束的光学系统，光检测器，其使用从 信息轨道，以及操作光学系统以使系统的焦点跟随记录介质的向上和向下移动的自动聚焦伺服系统，光学信息盘设备还设置有控制电路， 只有当光学系统处于与具有S曲线特性的散焦信号的线性区域相当的位置时，聚焦伺服系统才有效。
-
公开(公告)号：US4607358A
公开(公告)日：1986-08-19
申请号：US736125
申请日：1985-05-20
申请人： Takeshi Maeda , Motoo Uno , Kouji Muraoka , Masahiro Takasago , Yasumitsu Mizoguchi , Tokuya Kaneko
发明人： Takeshi Maeda , Motoo Uno , Kouji Muraoka , Masahiro Takasago , Yasumitsu Mizoguchi , Tokuya Kaneko
CPC分类号： G11B7/08517 , G11B17/005 , G11B7/08529 , G11B7/08588 , G11B7/0901
摘要： In an optical memory apparatus wherein predetermined information is optically recorded on a recording medium along guide grooves previously formed and then played back; an optical memory apparatus wherein, using a tracking signal and a signal indicating the quantity of reflected light at the time at which a projected light beam passes through the guide grooves, the directions in which the light beam passes through the grooves and the number of the guide grooves to be passed are detected, a seek control is performed by adding and subtracting the numbers of the guide grooves to be passed, depending upon the directions of passage, and fine positioning is thereafter performed by the use of the tracking signal.
摘要翻译： 在光存储装置中，其中预先确定的信息沿预先形成的导向槽光记录在记录介质上，然后重放; 一种光存储装置，其中使用跟踪信号和指示投影光束穿过引导槽的时间处的反射光量的信号，光束通过凹槽的方向和 检测要通过的引导槽，通过根据通过方向加减去要通过的引导槽的数量来执行寻道控制，然后通过使用跟踪信号进行精细定位。
-
公开(公告)号：US4550394A
公开(公告)日：1985-10-29
申请号：US479894
申请日：1983-03-29
CPC分类号： G11B7/24085 , G11B27/36 , G11B7/0903
摘要： An optical information recording system in which predetermined information is recorded by a first laser light beam on a recording medium along a guiding groove previously formed in the recording medium. Second and third laser light beams are projected onto the recording medium at positions deviated from the center of the guiding groove and preceding and succeeding to the first laser beam. A pattern in which no mutual interference of information to be recorded by the first laser beam is present is detected from an information signal which modulates the intensity of the first laser light beam. A difference is determined between the quantity of light reflected upon illumination of the recorded pattern by the second laser beam chronographically succeeding to the first laser beam and the quantity of light reflected upon illumination by the third laser beam. The position of the first laser beam is controlled on the basis of the thus determined difference for effecting an information tracking operation with improved accuracy.
摘要翻译： 一种光学信息记录系统，其中通过预先形成在记录介质中的导向槽，通过第一激光束将预定信息记录在记录介质上。 第二和第三激光束在与引导槽的中心偏离并在第一激光束之前和之后的位置处被投影到记录介质上。 从调制第一激光的强度的信息信号中检测不存在由第一激光束记录的信息的相互干扰的图案。 在通过第一激光束的时间计时的第二激光束照射记录图案反射的光量与由第三激光束照射反射的光量之间确定差异。 基于如此确定的差异来控制第一激光束的位置，以提高准确度进行信息跟踪操作。
-
8.发明授权Method and apparatus for optical recording and reproduction with tracking servo reducing track offset 失效用于跟踪跟踪减少跟踪偏移的光学记录和再现的方法和装置
公开(公告)号：US5105409A
公开(公告)日：1992-04-14
申请号：US230971
申请日：1988-08-11
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/09
CPC分类号： G11B7/094
摘要： Disclosed is an optical recording and reproducing apparaus comprising a light source directing a light spot toward a recording medium, a detection system detecting light reflected from the recording medium to derive an electrical signal from the reflected light, an information processing circuit modulating the intensity of the light spot according to writing pulses to record information on the recording medium and using the electrical signal to reproduce information from the recording medium, and a tracking servo circuit carrying out tracking servo operation on the basis of the electrical signal and including an extracting circuit connected to a source of extracting pulses having a pulse width at least equal to the writing pulse width so that writing pulse parts contained in the electrical signal are extracted during recording information, whereby a track offset occurring during information recording can be minimized, and the stability of the tracking servo system can be improved.
-
公开(公告)号：US4541083A
公开(公告)日：1985-09-10
申请号：US446251
申请日：1982-12-02
申请人： Takeshi Maeda , Motoo Uno , Masahiro Takasago
发明人： Takeshi Maeda , Motoo Uno , Masahiro Takasago
CPC分类号： G11B7/08505
摘要： In a light spot control signal generating device, a light spot is irradiated on a recording medium having tracks on which information is recorded. In order to jump the light spot from a track being scanned thereby to an adjacent track, a signal representative of light quantity of reflection or transmission of the light spot and a track error signal are detected. The two signals are used to judge whether the light spot has passed through an edge of the track. The track error signal is also used to detect a signal representative of an instant at which the light spot is present at the middle point between adjacent tracks, and this signal is used as a timing signal for changing the polarity of a control signal applied to a spot light deflector.
摘要翻译： 在光点控制信号发生装置中，将光点照射在具有记录有信息的轨迹的记录介质上。 为了将光点从被扫描的轨道跳转到相邻的轨道，检测表示光点的反射或透射的光量的信号和轨道误差信号。 这两个信号用于判断光点是否已通过轨道的边缘。 轨道误差信号还用于检测表示在相邻轨道之间的中点存在光点的时刻的信号，并且该信号用作定时信号，用于改变施加到一个或多个的控制信号的极性 点光偏转器
-
10.发明授权Optical disc access method and optical disk storage using coarse and fine actuators 失效光盘存取方法和光盘存储使用粗细细致动器
公开(公告)号：US4866687A
公开(公告)日：1989-09-12
申请号：US240487
申请日：1988-09-06
CPC分类号： G11B7/08588 , G11B7/08517 , G11B7/08541 , G11B7/0953 , Y10S358/907
摘要： An optical disk storage access method using a fine and coarse actuators for positioning a light spot to an intended track on the disk, wherein a pulse is generated each time the light spot has traversed a track, the pulses are counted to determine the distance from the current spot position to a target track, the fine actuator is activated depending on the measured distance, and the fine and coarse actuators are operated in unison so that the light spot is positioned to the target track.
摘要翻译： 一种光盘存储访问方法，使用精细和粗略的致动器将光点定位到盘上的预期轨道，其中每当光点已经穿过轨道时产生脉冲，则脉冲被计数以确定距离 当前光点位置到目标轨道，精细致动器根据测量的距离被激活，并且精细和粗略的致动器被一致地操作，使得光点被定位到目标轨道。
-
-
-
-
-
-
-
-
-
搜索结果
21 条记录 (耗时 0.023 秒)
