公开(公告)号：US5379288A

公开(公告)日：1995-01-03

申请号：US25644

申请日：1993-03-03

申请人： Takanori Maeda ,  Noriaki Murao

发明人： Takanori Maeda ,  Noriaki Murao

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/13 ,  G11B20/10 ,  G11B7/26 ,  G11B11/18

CPC分类号： G11B7/24085 ,  G11B20/10009 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/13

摘要： An optical information recording medium, to and from which information can be recorded or reproduced at a high density, uses more number of kinds of pits than those of a conventional optical disc. A reproducing apparatus for such a medium also is devised. Information is recorded onto the recording medium by using a plurality of pit lengths which are obtained by dividing a whole frequency band below a cut-off frequency of MTF characteristic of a reproducing system into a plurality of bands in correspondence to the band characteristic and by allocating a plurality of spatial frequencies to the divided bands. The reproducing apparatus of the invention comprises an optical pickup to read out the recording information from the optical recording medium and signal demodulating means for demodulating the original data from the pulse width and amplitude value of the reproduction signal which is supplied from the optical pickup, wherein the optical pickup is designed to have an MTF characteristic such as to have one or a plurality of peaks at certain frequency positions.

摘要翻译： 可以以高密度记录或再现信息的光学信息记录介质使用比常规光盘更多数量的凹坑。 还设计了这种介质的再现装置。 信息通过使用通过将再现系统的MTF特性的截止频率以下的整个频带划分成与频带特性相对应的多个频带而获得的多个凹坑长度并通过分配来记录在记录介质上 对分割频带的多个空间频率。 本发明的再现装置包括一个光拾取器，用于从光学记录介质读出记录信息和信号解调装置，用于根据从光学拾取器提供的再现信号的脉冲宽度和振幅值对原始数据进行解调，其中 光学拾取器被设计为具有MTF特性，例如在某些频率位置具有一个或多个峰值。

公开(公告)号：US4504934A

公开(公告)日：1985-03-12

申请号：US305346

申请日：1981-09-24

申请人： Shinichi Tanaka ,  Ikuo Matsuda ,  Namio Hirose ,  Kazutsugu Kobayashi

发明人： Shinichi Tanaka ,  Ikuo Matsuda ,  Namio Hirose ,  Kazutsugu Kobayashi

IPC分类号： G11B11/18

CPC分类号： G11B11/18

摘要： In an optical signal reproducing apparatus for a conventional disc phonograph record, the groove of said record is irradiated with the light beam from a direction that varies cyclically at a constant frequency in a plane. Said plane includes both the tangential velocity vector of the groove and a normal line to the surface of the groove. At the moment that the light beam irradiates the surface of the groove from a perpendicular direction, the reflected light beam traces back the same path as that of the irradiating light beam. When a photo-detector is limited by a slit to detect only the reflected light beam tracing back the same path as the irradiating light beam, the photo-detector detects light pulses which are pulse-phase-modulated by the slope angle of the surface of the groove. The recorded signal can be reproduced by demodulating said pulse-phase-modulated pulses.

摘要翻译： 在用于常规唱盘唱片记录的光信号再现装置中，所述记录的凹槽用平面中恒定频率周期性变化的方向用光束照射。 所述平面包括凹槽的切向速度矢量和与凹槽表面的法线。 在光束从垂直方向照射槽的表面的那一刻起，反射光束跟踪与照射光束相同的路径。 当光检测器被狭缝限制以仅检测跟照射光束跟踪相同路径的反射光束时，光检测器检测由脉冲相位调制的光脉冲， 凹槽 可以通过对所述脉冲相位调制脉冲进行解调来再现所记录的信号。

公开(公告)号：US3818148A

公开(公告)日：1974-06-18

申请号：US29501172

申请日：1972-09-29

申请人： LICENTIA GMBH

发明人： DICKOPP G

IPC分类号： G11B7/004 ,  G11B7/007 ,  G11B7/085 ,  G11B7/12 ,  G11B7/24 ,  G11B11/18

CPC分类号： G11B7/24 ,  G11B7/004 ,  G11B7/007 ,  G11B7/085 ,  G11B7/12

摘要： A method and apparatus for reproducing signals stored on a carrier in the form of undulations corresponding to the signals, the undulations generally being formed as a spiral groove. The undulations on the carrier are moved past a suitable radiation source, such as a light source, and the density of the radiation emanating from the undulations, which is a function of the curvature of the undulation, is detected by a suitable radiation detecting means after it passes through a suitable slit aperture arranged at a predetermined distance from the carrier surface, so that variations in the density are a function of the undulations. The undulations may be either frequency or phase modulated with respect to the signal and their amplitude can be modified as a function of their recorded wavelength in such a manner that the curved surface portions of the undulations have nearly the same focal length for all occurring wavelengths. The carrier can have at least one recording surface in which is formed a groove having a trapezoidal cross section and having its bottom surface provided with the undulations.

摘要翻译： 一种用于再现以对应于信号的波形形式存储在载体上的信号的方法和装置，所述起伏通常形成为螺旋槽。 载体上的波动被移动通过合适的辐射源，例如光源，并且由起伏的曲率的函数的波动发出的辐射的密度在合适的辐射检测装置之后由适当的辐射检测装置检测 它穿过布置在与载体表面预定距离的合适的狭缝孔，使得密度的变化是起伏的函数。 波动可以是相对于信号的频率或相位调制，并且它们的幅度可以以这样的方式被修改为它们记录的波长的函数，使得波形的曲面部分对于所有出现的波长具有几乎相同的焦距。 载体可以具有至少一个记录表面，其中形成有具有梯形横截面并且其底表面设置有起伏的凹槽。

公开(公告)号：US3452163A

公开(公告)日：1969-06-24

申请号：US3452163D

申请日：1965-12-08

申请人： PHILLIP B DAHLEN

发明人： DAHLEN PHILLIP B

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/09 ,  G11B7/12 ,  G11B7/14 ,  G11B11/18 ,  H04N5/76 ,  G11B3/00 ,  G11B11/10 ,  H01R11/08

CPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/0901 ,  G11B7/12 ,  G11B7/14 ,  G11B11/18 ,  H04N5/76

公开(公告)号：US4972344A

公开(公告)日：1990-11-20

申请号：US267167

申请日：1988-11-04

申请人： Robert E. Stoddard ,  Robert N. Stark

发明人： Robert E. Stoddard ,  Robert N. Stark

IPC分类号： G11B7/09 ,  G11B11/18 ,  G11B17/34

CPC分类号： G11B7/09 ,  G11B11/18 ,  G11B17/34

摘要： Disclosed is an optical turntable system for optically playing phonograph records having a recorded signal in a groove formed by a wall having a position modulated by the recorded signal. An optical unit includes an optical source providing a first light beam incident onto the wall to provide a reflected beam from the wall forming a reflected spot at a reflected position proportional to the recorded signal and also includes an optical sensor for sensing the reflected position of the reflected spot to provide an output data signal proportional to the recorded signal. The optical unit also includes a tracking assembly which functions to position the optical unit over the section of the groove of interest as the record turns.

摘要翻译： 公开了一种用于光学播放留声机的光盘转盘系统，其具有由具有由记录信号调制的位置的壁形成的凹槽中的记录信号。 光学单元包括光源，其提供入射到壁上的第一光束，以在与所记录的信号成比例的反射位置处形成反射光点从壁形成反射光束，并且还包括光学传感器，用于感测 反射点以提供与记录信号成比例的输出数据信号。 光学单元还包括跟踪组件，其用于在记录转动时将光学单元定位在感兴趣的凹槽的部分上。

公开(公告)号：US4424580A

公开(公告)日：1984-01-03

申请号：US260963

申请日：1981-05-06

申请人： Becker Carl H. ,  Werner J. Christmann

发明人： Becker Carl H. ,  Werner J. Christmann

IPC分类号： G03G5/16 ,  G11B11/105 ,  G11B11/18 ,  G11C13/06 ,  H01F41/14 ,  G11C13/04

CPC分类号： H01F41/14 ,  G03G5/16 ,  G11B11/10502 ,  G11B11/10539 ,  G11B11/10545 ,  G11C13/06 ,  G11B11/10584 ,  G11B11/10586

摘要： Methods and apparatus for reversibly altering magnetic characteristics or domains of ferrimagnetic material by photomagnetic means, particularly by electron spin reversal (spin-flip). Photomagnetic electron spin reversal and inversion creating cylinder domains and their surrounding toroid domains of oppositely directed intrinsic magnetization in ferrimagnetic thin film material are achieved by means of signal modulated circularly polarized laser radiation. Three different stable conditions are detectable. The invention has particular application as a fundamentally new aproach to erasable digital data storage, providing means and methods for photomagnetically alterable and erasable data storage which can be detected by observing polarization of optical radiation directed through the ferrimagnetic material.

摘要翻译： 通过光磁手段，特别是通过电子自旋反转（旋转翻转）可逆地改变铁磁材料的磁特性或畴的方法和装置。 通过信号调制的圆偏振激光辐射，实现了在亚铁磁性薄膜材料中产生磁畴的反磁反转和产生圆柱体畴及其周向环形区域的相反定向的本征磁化。 可检测到三种不同的稳定条件。 本发明作为可擦除数字数据存储的基本新颖的方法具有特别的应用，提供了可通过观察通过铁氧体材料引导的光辐射的偏振来检测光可变和可擦除数据存储的方法和方法。

公开(公告)号：US4378491A

公开(公告)日：1983-03-29

申请号：US228609

申请日：1981-01-26

申请人： Thomas F. Lehman

发明人： Thomas F. Lehman

IPC分类号： G11B7/09 ,  G11B11/18 ,  G11B7/08

CPC分类号： G11B7/09 ,  G11B11/18

摘要： A method and apparatus employing optical type techniques are provided for use in reliably sensing the juxtapositional relationship between successively relevant portions of an object and a sensing unit that are relatively movable, in accurately maintaining a predetermined juxtapositional relationship between such portions of the object and the sensing unit during relative movement therebetween, and, when appropriate to the application, in also faithfully sensing other information carried by such portions of the object. The method and apparatus are characterized by eliminating any need for mechanical engagement between the sensing unit and the portions of the object to which the sensing unit responds and by utilizing only optical type coupling between such portions of the object and the sensing unit for the transfer of all information to be acquired by the sensing unit from the object. An important and currently preferred application of the method and apparatus, in which both positional and other information are sensed, is in playing ordinary phonograph records without inducing wear thereto in the course of sensing the recorded information. In the context of the mentioned application, both information for controlling the juxtapositional relationships between the record and the sensing unit with respect to both spacing and groove tracking and information with respect to the recorded audio material are sensed. In other contemplated applications, the sensing of only that information needed for controlling juxtapositional relationships may be desired, or the other information to be sensed may represent digitally encoded data, etc.

摘要翻译： 提供一种使用光学类型技术的方法和装置，用于可靠地检测物体的连续相关部分和相对可移动的感测单元之间的并置关系，以精确地保持物体的这些部分与感测之间的预定的并置关系 在适当的情况下，还可以忠实地感测物体的这些部分携带的其它信息。 该方法和装置的特征在于消除了感测单元与感测单元所响应的物体的部分之间的机械接合的需要，并且仅利用物体的这些部分和传感单元之间的光学类型耦合 由感测单元从对象获取的所有信息。 感测位置信息和其他信息的方法和装置的一个重要且当前优选的应用是在感测所记录的信息的过程中播放普通的留声机记录而不引起磨损。 在所述应用的上下文中，感测到用于控制记录和感测单元之间关于间隔和凹槽跟踪以及关于所记录的音频材料的信息的并置关系的两个信息。 在其他预期的应用中，仅需要感测用于控制并置关系所需的信息，或者要感测的其他信息可以表示数字编码的数据等。

公开(公告)号：US4068121A

公开(公告)日：1978-01-10

申请号：US686881

申请日：1976-05-17

申请人： Edward D. Bringhurst ,  John L. Marshall

发明人： Edward D. Bringhurst ,  John L. Marshall

IPC分类号： G02B17/04 ,  G02B17/06 ,  G02B19/00 ,  G11B7/135 ,  G11B11/18 ,  G02B5/14

CPC分类号： G11B11/18 ,  G02B17/04 ,  G02B19/0028 ,  G02B19/0076 ,  G02B6/0048 ,  G11B7/1362

摘要： A light collector and prism that collects light from a single bulb and produces a narrow strip light beam is disclosed. The light collector and prism is formed of an elongate, integral piece of transparent material (plastic) and includes a light collecting section at one end and a prism section at the other end. Light rays emitted from a small bulb positioned in an aperture in the light collecting section are collected, to some extent (e.g., imperfectly) collimated, and directed into the prism section. The prism section extends outwardly from the collector section so as to receive the light rays collected, collimated and directed by the collecting section. The prism section includes a plurality of prism surfaces located along one edge thereof. Light rays directed by the light collecting section toward the prism section are reflected by the prism surfaces toward an opposing, narrow, light emitting edge of the prism section. Light rays emitted from the narrow edge form a narrow strip light beam. Preferably, all of the surfaces of the light collector and prism are metalized, except for the aperture within which the light source is mounted and, the narrow edge of the prism through which the narrow strip light beam is emitted.

摘要翻译： 公开了一种从单个灯泡收集光并产生窄带光束的集光器和棱镜。 光收集器和棱镜由细长的整体的透明材料（塑料）构成，并且在一端包括聚光部分和另一端的棱镜部分。 从位于聚光部分的孔中的小灯泡发射的光线在一定程度上（例如，不完全）被收集并被定向到棱镜部分。 棱镜部分从收集器部分向外延伸，以便接收由收集部分收集，准直和指导的光线。 棱镜部分包括沿其一个边缘设置的多个棱镜表面。 由聚光部分朝向棱镜部分引导的光线被棱镜表面反射到棱镜部分的相对的窄的发光边缘。 从窄边发射的光线形成窄条光束。 优选地，除了安装光源的孔径以及发射窄条带光束的棱镜的窄边缘之外，光收集器和棱镜的所有表面都被金属化。

公开(公告)号：US1909504A

公开(公告)日：1933-05-16

申请号：US56970131

申请日：1931-10-19

申请人： ROBBINS PERCY A

发明人： ROBBINS PERCY A

IPC分类号： G11B11/18 ,  G11B15/60

CPC分类号： G11B15/60 ,  G11B11/18

公开(公告)号：US5537385A

公开(公告)日：1996-07-16

申请号：US394425

申请日：1995-02-24

申请人： Amir Alon ,  Shlomo Shapira ,  Itzhak Katz

发明人： Amir Alon ,  Shlomo Shapira ,  Itzhak Katz

IPC分类号： G11B7/09 ,  G11B7/12 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B7/14 ,  G11B11/18 ,  G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/12 ,  G11B7/127 ,  G11B7/128 ,  G11B7/1362 ,  G11B7/1384 ,  G11B7/14

摘要： A method of reading data from an optical disk comprises providing means for illuminating the required part of the disk and acquiring the optical image of a plurality of tracks, providing a detector matrix comprising a plurality of detectors, each of the detectors being capable of producing an output signal which is proportional to the intensity of the light detected by it causing an optical image corresponding to an illuminated area to fall on the said detector matrix, transferring the output signal of the detector matrix to image processing means, determining position coordinates of the track center for each data track, by analyzing the output signal of the said detector matrix, saving in memory means expected track center data, comprising position coordinates of the track center located by the analysis of the output signal, and if an actually detected track center is shifted with respect to the expected track center, electronically moving the track center position.

摘要翻译： 从光盘读取数据的方法包括：提供用于照亮盘的所需部分并获取多个轨道的光学图像的装置，提供包括多个检测器的检测器矩阵，每个检测器能够产生 输出信号，其与由其检测到的光的强度成比例，使得与照明区域相对应的光学图像落在所述检测器矩阵上，将检测器矩阵的输出信号传送到图像处理装置，确定轨道的位置坐标 通过分析所述检测器矩阵的输出信号，通过分析所述检测器矩阵的输出信号来节省存储装置预期轨道中心数据，包括通过对输出信号的分析定位的轨道中心的位置坐标，以及如果实际检测到的轨道中心是 相对于预期轨道中心移动，电子地移动轨道中心位置。