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1. 发明授权

US4520280A Apparatus for detecting input signal 失效
标题翻译：用于检测输入信号的装置
公开(公告)号：US4520280A
公开(公告)日：1985-05-28
申请号：US406487
申请日：1982-08-09
申请人： Shozi Yoshikawa , Hiroshi Kodama , Ken Ohsima , Masaharu Sakamoto , Kiichi Kato , Kunio Yamamiya
发明人： Shozi Yoshikawa , Hiroshi Kodama , Ken Ohsima , Masaharu Sakamoto , Kiichi Kato , Kunio Yamamiya
IPC分类号： H03K5/08 , H03K5/153
CPC分类号： H03K5/082
摘要： An input signal containing a base line which fluctuates to a great extent is detected or restored by comparing the input signal with reference levels which are shifted in accordance with the fluctuation of base line. The input signal is sampled at a variable sampling rate and an average of sampled values for a predetermined period is derived to produce a profile signal which resembles accurately the fluctuation of the base line. The profile signal thus obtained is added to upper and lower threshold voltages to produce the reference levels which have been corrected in accordance with the fluctuation of the base line of input signal.
摘要翻译：通过将输入信号与根据基线的波动偏移的参考电平进行比较来检测或恢复包含大幅波动的基线的输入信号。以可变采样率对输入信号进行采样，得到预定周期的采样值的平均值，以产生类似于基线波动的分布信号。由此获得的轮廓信号被加到上限和下限阈值电压上，以产生已经根据输入信号的基线的波动校正的基准电平。

2. 发明授权

US4499572A Method for reading information or defect out of rotating disc 失效
标题翻译：用于读取信息或从旋转盘中缺陷的方法
公开(公告)号：US4499572A
公开(公告)日：1985-02-12
申请号：US402075
申请日：1982-07-26
申请人： Shozi Yoshikawa , Masaharu Sakamoto , Hiroshi Kodama , Kunio Yamamiya , Kiichi Kato , Ken Ohsima
发明人： Shozi Yoshikawa , Masaharu Sakamoto , Hiroshi Kodama , Kunio Yamamiya , Kiichi Kato , Ken Ohsima
IPC分类号： G11B5/012 , G01N21/95 , G11B7/0037 , G11B7/013 , G11B20/08 , G11B20/10 , G11B27/36 , G11B7/00
CPC分类号： G11B27/36 , G01N21/9506 , G11B20/08 , G11B20/10 , G11B7/00375 , G11B7/013
摘要： In order to read out information recorded on a disc rotating at a constant angular velocity by means of a pick-up head movably arranged in a disc radius direction, a head position on the disc is detected to obtain a position signal representing a distance from a disc center to the pick-up head, and then a pulse signal having a frequency corresponding to the position signal thus obtained is generated. A detection signal supplied from the pick-up head and the pulse signal are supplied to an AND gate and pulses of the gated out pulse signal are counted by a counter. The number of the counted pulses represents correctly a length of the information recorded on the disc irrespective of position of the information on the disc.
摘要翻译：为了通过可移动地以盘半径方向布置的拾取头读出记录在以恒定角速度旋转的盘上的信息，检测盘上的头位置以获得表示距离光盘中心到拾取头，然后产生具有与如此获得的位置信号相对应的频率的脉冲信号。从拾取头提供的检测信号和脉冲信号被提供给与门，门控脉冲信号的脉冲由计数器计数。计数脉冲的数量正好表示记录在盘上的信息的长度，而与盘上的信息的位置无关。

3. 发明授权

US4464050A Apparatus for detecting optically defects 失效
标题翻译：用于检测光学缺陷的设备
公开(公告)号：US4464050A
公开(公告)日：1984-08-07
申请号：US345153
申请日：1982-02-02
申请人： Kiichi Kato , Masaharu Sakamoto , Shoji Yoshikawa , Kunio Yamamiya , Hiroshi Kodama , Ken Ohsima
发明人： Kiichi Kato , Masaharu Sakamoto , Shoji Yoshikawa , Kunio Yamamiya , Hiroshi Kodama , Ken Ohsima
IPC分类号： G01N21/88 , G01N21/95 , G01N21/956 , G11B7/0037 , G11B7/26 , H01L21/66
CPC分类号： G11B7/00375 , G01N21/9506
摘要： An apparatus for detecting optically defects in object such as original glass disc for use in manufacturing video and audio discs by projecting a laser light flux onto the object includes an objective lens for focussing the incident laser light flux onto the object as a small light spot, the laser light flux passing through the objective lens at only its central portion. When the object has no defect in the light spot area, the laser light flux is regularly reflected by the object surface, but when the object includes a defect in the light spot area, the light flux is scattered by the defect. The directly reflected and scattered light fluxes are collected by the objective lens and are then separated from each other by means of a small mirror arranged in an optical axis of the directly reflected light flux. The directly reflected and scattered light fluxes thus separated are received by first and second light detectors. A cylindrical lens is inserted between the small mirror and the first light detector having four divided light receiving regions. The objective lens is driven into an in-focussed position under the control of a focussing error signal which is derived by processing output signals from the four divided light receiving regions. A defect signal is derived by processing output signals supplied from the first and second light detectors.
摘要翻译：用于通过将激光光束投射到物体上来制造视频和音频盘的用于检测用于制造视频和音频盘的原始玻璃盘的物体的光学缺陷的装置包括：用于将入射的激光光束聚焦到物体上作为小光斑的物镜，激光光束仅在其中心部分通过物镜。当物体在光斑区域没有缺陷时，激光光束被物体表面规则地反射，但是当物体包含光斑区域的缺陷时，光通量被缺陷散射。直接反射和散射的光束由物镜收集，然后通过布置在直射反射光束的光轴上的小反射镜彼此分离。这样分离的直接反射和散射的光束被第一和第二光检测器接收。在具有四个分开的光接收区域的小反射镜和第一光检测器之间插入柱面透镜。在通过处理来自四个分开的光接收区域的输出信号导出的聚焦误差信号的控制下，物镜被驱动到聚焦位置。通过处理从第一和第二光检测器提供的输出信号来导出缺陷信号。

4. 发明授权

US4505585A System for detecting defects on an optical surface 失效
标题翻译：用于检测光学表面上的缺陷的系统
公开(公告)号：US4505585A
公开(公告)日：1985-03-19
申请号：US362680
申请日：1982-03-29
申请人： Shoji Yoshikawa , Ken Ohshima , Hiroshi Kodama , Kunio Yamamiya , Masaharu Sakamoto , Kiichi Kato
发明人： Shoji Yoshikawa , Ken Ohshima , Hiroshi Kodama , Kunio Yamamiya , Masaharu Sakamoto , Kiichi Kato
IPC分类号： G01N21/84 , G01N21/88 , G01N21/95 , G06T7/00 , G11B7/0037 , G01B11/30 , G06F15/20
CPC分类号： G01N21/9506 , G11B7/00375 , G01N2021/8864 , G01N21/9501
摘要： In a system for detecting defects on an optical surface, a disk to be inspected is mounted on a turntable, and is attracted on the surface of the turntable. On the disk is provided an optical head having an objective lens located at its focal point on the surface of the disk. A laser beam emitted from a laser unit is projected through the optical head onto the disk, is reflected on the disk, and is then directed through the optical head to a photo detector. The optical head is moved in the radial direction of the disk as the turntable is rotated, and the disk is helically scanned by the laser beam. Only a defect signal is extracted from an electrical signal generated from the photo detector in a defect signal generator. The defect signal is compared in a data processing unit, and is converted to defect information of different size. When it is judged that a prescribed region on the surface of the disk is scanned by a position signal from a position sensor for detecting the position of the optical head, the data processing unit generates an address, and the defect information is stored in each size in specific assigned locations of the RAM. The defect information thus stored is displayed on a CRT or is printed out by a printer.
摘要翻译：在用于检测光学表面上的缺陷的系统中，待检查的盘安装在转盘上，并且被吸引在转台的表面上。在光盘上设置有一个光学头，该光学头具有位于其表面上的焦点处的物镜。从激光单元发射的激光束通过光头投影到盘上，在盘上被反射，然后被引导通过光头到光检测器。当转盘旋转时，光头在盘的径向上移动，并且盘被激光束螺旋扫描。在缺陷信号发生器中仅从光电检测器产生的电信号中提取缺陷信号。在数据处理单元中比较缺陷信号，并将其转换为不同大小的缺陷信息。当通过来自用于检测光头的位置的位置传感器的位置信号来判断盘的表面上的规定区域被扫描时，数据处理单元生成地址，并且以每个尺寸存储缺陷信息在RAM的特定分配位置。由此存储的缺陷信息显示在CRT上，或由打印机打印出来。

5. 发明授权

US4499514A Disc drive apparatus 失效
标题翻译：盘驱动装置
公开(公告)号：US4499514A
公开(公告)日：1985-02-12
申请号：US362614
申请日：1982-03-29
申请人： Kunio Yamamiya , Hiroshi Kodama , Ken Ohshima , Shoji Yoshikawa , Kiichi Kato , Masaharu Sakamoto
发明人： Kunio Yamamiya , Hiroshi Kodama , Ken Ohshima , Shoji Yoshikawa , Kiichi Kato , Masaharu Sakamoto
IPC分类号： G11B17/028 , G11B19/20 , G11B23/00 , G11B25/04 , G11B5/012
CPC分类号： G11B17/0282 , G11B19/2009 , G11B23/00 , G11B25/043
摘要： A disc drive apparatus for driving a disc selected from discs of various diameters with and without a central hole comprises: a turntable with a hole at the center of rotation thereof; a turntable support for rotatably supporting the turntable; a motor for driving the turntable; a centering member to be detachably inserted in the hole of the turntable and for mounting a disc with a central hole; a plurality of elastic disc support members which are coaxial with the center of rotation of the turntable, which extend from the surface of the turntable, and which form a plurality of annular shapes; centering index marks, disposed on the turntable, for centering a disc without a central hole; a vacuum pump; and suction channels, one end of which is open to the surface of the turntable and the other end of which is connected to the vacuum pump, for fixing on some of the disc support members the disc selected from discs of various diameters with and without a central hole and placed on some of said disc support members.
摘要翻译：一种盘驱动装置，用于驱动选自具有和不具有中心孔的各种直径的盘的盘，包括：具有在其旋转中心的孔的转台; 用于可旋转地支撑转盘的转盘支撑件; 用于驱动转台的电机; 定心构件可拆卸地插入转盘的孔中并用于安装具有中心孔的盘; 与转盘的旋转中心同轴的多个弹性盘支撑构件，其从转台的表面延伸并且形成多个环形形状; 设置在转盘上的定心折痕标记，用于使没有中心孔的圆盘定心; 真空泵; 以及抽吸通道，其一端通向转台的表面，另一端连接到真空泵，用于将一些盘支撑件固定在盘片上，该碟片选自具有和不具有中心孔并放置在一些所述盘支撑构件上。

6. 发明授权

US4495407A System for focusing an optical head onto a flat surface 失效
标题翻译：用于将光学头聚焦到平坦表面上的系统
公开(公告)号：US4495407A
公开(公告)日：1985-01-22
申请号：US362613
申请日：1982-03-29
申请人： Hiroshi Kodama , Masaharu Sakamoto , Ken Ohshima , Shoji Yoshikawa , Kunio Yamamiya , Kiichi Kato
发明人： Hiroshi Kodama , Masaharu Sakamoto , Ken Ohshima , Shoji Yoshikawa , Kunio Yamamiya , Kiichi Kato
IPC分类号： G02B7/00 , G02B7/32 , G11B7/085 , G11B7/09 , G01J1/20
CPC分类号： G11B7/08511 , G02B7/32 , G11B7/0908
摘要： A system for focusing an optical head onto a flat surface has a mechanism for moving the optical head in the direction of the optical axis of the head and a mechanism for moving an objective lens in the optical head in the direction of the optical axis of the lens. A laser beam projected from the objective lens of the optical head is reflected on the flat surface, is reflected on the beam splitter, and is introduced into a detector unit. The detector unit thus generates a focusing signal having a level responsive to the distance between the objective lens and the surface. The optical head is lowered by the mechanism for moving the optical head in accordance with the focusing signal when it passes a predetermined point, and is operated to locate the focal point of the objective lens on the surface. Thereafter, the mechanism for moving the optical head becomes inoperative, and the mechanism for moving the objective lens is operated. This mechanism operates in accordance with the focusing signal and locates the focal point of the objective lens always on the surface.
摘要翻译：用于将光学头聚焦到平坦表面上的系统具有用于沿着光头的光轴方向移动光学头的机构，以及用于沿光学头的光轴方向移动光学头中的物镜的机构镜片。从光头的物镜投射的激光束在平坦表面上反射，在分束器上被反射，并被引入到检测器单元中。因此，检测器单元产生具有响应物镜与表面之间距离的电平的聚焦信号。通过用于在通过预定点时根据聚焦信号移动光学头的机构降低光学头，并且操作以将物镜的焦点定位在表面上。此后，用于移动光学头的机构变得不起作用，并且用于移动物镜的机构被操作。该机构根据聚焦信号进行操作，并将物镜的焦点始终位于表面上。

7. 发明授权

US4631712A Optical disk apparatus with beam energy correction for deviations in inclination 失效
标题翻译：具有光束能量校正的光盘装置倾斜偏差
公开(公告)号：US4631712A
公开(公告)日：1986-12-23
申请号：US627764
申请日：1984-07-05
申请人： Nobuhide Matsubayashi , Hideyuki Kenjyo , Kiichi Kato , Masaharu Sakamoto
发明人： Nobuhide Matsubayashi , Hideyuki Kenjyo , Kiichi Kato , Masaharu Sakamoto
IPC分类号： G11B7/09 , G11B7/0037 , G11B7/095 , G11B7/125 , G11B7/126
CPC分类号： G11B7/126 , G11B7/0037 , G11B7/0956
摘要： An optical disk apparatus has an optical head. The optical head emits a light beam onto an optical disk and forms pits in the optical disk, thereby recording a signal. A detector detects the relative inclination between the optical head and the optical disk and generates a signal corresponding to this relative inclination. A beam intensity correction circuit corrects the intensity of the light beam in accordance with the relative inclination to form proper pits. In one embodiment, the intensity of the light beam is increased when the relative inclination is increased.
摘要翻译：光盘装置具有光头。光头将光束发射到光盘上并在光盘中形成凹坑，从而记录信号。检测器检测光头和光盘之间的相对倾斜度并产生对应于该相对倾角的信号。光束强度校正电路根据相对倾斜度校正光束的强度，形成适当的凹坑。在一个实施例中，当相对倾斜度增加时，光束的强度增加。

8. 发明授权

US4607359A Optical recording/reproducing apparatus 失效
标题翻译：光记录/重放装置
公开(公告)号：US4607359A
公开(公告)日：1986-08-19
申请号：US575045
申请日：1984-01-30
申请人： Nobuhide Matsubayashi , Kiichi Kato , Masaharu Sakamoto
发明人： Nobuhide Matsubayashi , Kiichi Kato , Masaharu Sakamoto
IPC分类号： G11B7/135 , G11B7/09 , G11B7/12 , G11B7/125 , G11B7/1359 , G11B7/1378 , G11B7/1381 , G11B7/08
CPC分类号： G11B7/0903 , G11B7/1359 , G11B7/1378 , G11B7/1381
摘要： An optical recording/reproducing apparatus has a beam emitting device adapted to emit at least two light beams in directions at a minute angle to each other. The light beams are condensed by a condensing member onto slightly separated two points on a disk and reflected by the disk. The light beams from the disk are polarized to a prism by a polarizing device. The prism refracts the light beams from the polarizing device, thereby increasing the relative angle between the light beams. The refracted light beams are converged by a converging lens on a detector.
摘要翻译：光学记录/再现装置具有适于在至少两个彼此以小角度的方向发射的光束的发射装置。光束被聚光部件聚集在盘上略微分开的两个点上，并被光盘反射。来自盘的光束通过偏振装置偏振到棱镜。棱镜折射来自偏振装置的光束，从而增加光束之间的相对角度。折射光束被会聚透镜会聚在检测器上。

9. 发明授权

US4574371A Apparatus for recording and reproducing information on an optical disc 失效
标题翻译：用于在光盘上记录和再现信息的装置
公开(公告)号：US4574371A
公开(公告)日：1986-03-04
申请号：US466910
申请日：1983-02-16
申请人： Haruhiko Takemura , Kiichi Kato , Masaharu Sakamoto
发明人： Haruhiko Takemura , Kiichi Kato , Masaharu Sakamoto
IPC分类号： G11B7/08 , G11B7/085 , G11B7/12 , G11B7/00
CPC分类号： G11B7/12 , G11B7/08 , G11B7/085
摘要： An optical recording and reproducing apparatus includes a first semiconductor laser for emitting a recording laser beam whose intensity is modulated in accordance with an information signal to be recorded and a second semiconductor laser for emitting a reproducing laser beam having a constant intensity. The recording and reproducing semiconductor lasers are commonly mounted in a supporting member which is mounted on a pick-up plate arranged movably in a radial direction of a rotating optical disc. The recording and reproducing laser beams are composed with each other by means of a substantially parallelogram shaped prism having a reflection surface for reflecting the reproducing laser beam and an optical surface upon which the reproducing laser beam is made incident at an incident angle larger than a critical angle and the recording laser beam is made incident at an incident angle near Brewster's angle. The composed recording and reproducing laser beams are commonly focussed by a single objective lens onto the optical disc in such a manner that the recording laser beam is made incident upon an information track to be formed and the reproducing laser beam is made incident upon a guide track or a previously recorded information track.
摘要翻译：一种光学记录和再现装置包括：第一半导体激光器，用于发射根据要记录的信息信号调制其强度的记录激光束;以及第二半导体激光器，用于发射具有恒定强度的再现激光束。记录和再现半导体激光器通常安装在支撑构件中，支撑构件安装在沿旋转光盘的径向方向可移动地布置的拾取板上。记录和再现激光束通过具有用于反射再现激光束的反射表面的基本上平行四边形的棱镜和重现激光束以大于临界的入射角入射的光学表面彼此组成角度和记录激光束以布鲁斯特角附近的入射角入射。组合的记录和再现激光束通常由单个物镜聚焦到光盘上，使得记录激光束入射到要形成的信息轨迹上，并且再现激光束入射到导轨上或先前记录的信息轨道。

10. 发明授权

US4545651A Optical system for synthesizing plural light beams 失效
标题翻译：用于合成多个光束的光学系统
公开(公告)号：US4545651A
公开(公告)日：1985-10-08
申请号：US454869
申请日：1982-12-30
申请人： Kiichi Kato , Masaharu Sakamoto
发明人： Kiichi Kato , Masaharu Sakamoto
IPC分类号： G02B27/10 , G02B27/28 , G11B7/08 , G11B7/12 , G11B7/135 , G11B7/1359 , G11B7/1392 , G11B7/1398 , G02B5/30
CPC分类号： G11B7/1398 , G02B27/1006 , G02B27/14 , G02B27/144 , G02B27/28 , G11B7/08 , G11B7/1359 , G11B7/13922
摘要： In an optical system for synthesizing a plurality of light beams, a first light beam of parallel light rays emitted from a laser beam source is incident on an inclined face of a right angle prism through the prism. A second light beam of parallel light rays emitted from a laser beam source is incident to the inclined face at a predetermined angle of incidence. The first light beam is emitted to the inclined face at an angle of incidence equal to a critical angle so that the first light beam is totally inflected by the inclined face and transmitted in a predetermined direction. The second light beam is refracted at an angle of refraction substantially equal to the Brewster's angle, and then transmitted in a direction which defines a predetermined angular difference with the predetermined direction of the first light beam. A multi-layered film is formed on the inclined face. The film makes the angle of refraction of the second light beam approach the critical angle, so as to reduce the angular difference from that which would exist in the absence of the film.
摘要翻译：在用于合成多个光束的光学系统中，从激光束源发射的平行光线的第一光束通过棱镜入射到直角棱镜的倾斜面上。从激光束发射的平行光线的第二光束以预定的入射角入射到倾斜面。第一光束以等于临界角的入射角发射到倾斜面，使得第一光束被倾斜面完全折射并沿预定方向透射。第二光束以基本上等于布鲁斯特角的折射角折射，然后沿与第一光束的预定方向限定预定角度差的方向透射。在倾斜面上形成多层膜。该胶片使第二光束的折射角接近临界角，从而减小与不存在胶片时所存在的角度差。

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