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1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明授权

US4750163A Pick-up head abnormality detector for optical recording/reproducing apparatus 失效
标题翻译：用于光学记录/再现装置的拾取头异常检测器
公开(公告)号：US4750163A
公开(公告)日：1988-06-07
申请号：US836673
申请日：1986-03-05
申请人： Kunio Yamamiya , Masaharu Sakamoto
发明人： Kunio Yamamiya , Masaharu Sakamoto
IPC分类号： G11B7/12 , G11B7/09 , G11B7/24 , G11B19/04 , G11B7/085 , G11B27/36
CPC分类号： G11B19/04 , G11B7/09 , G11B7/24
摘要： A device for detecting the abnormality of an optical pick-up head has a laser diode for emitting a light beam through an optical system to a reference reflective region formed at a predetermined portion of an optical disk, a photosensor for receiving a reflected light from the reflective region through the optical system, and a photosensor for detecting directly the light amount of the laser diode. The difference or a ratio of the detection signals of the photosensors is obtained, and the difference or the ratio is compared with a predetermined value. When the compared result exceeds a predetermined value, the result is decided to be an abnormality of the pick-up head.
摘要翻译：用于检测光学拾取头的异常的装置具有用于通过光学系统将光束发射到形成在光盘的预定部分处的参考反射区域的激光二极管，用于接收来自光学拾取头的反射光的光电传感器通过光学系统的反射区域和用于直接检测激光二极管的光量的光电传感器。获得光电传感器的检测信号的差异或比率，并将差值或比率与预定值进行比较。当比较结果超过预定值时，结果被确定为拾取头的异常。

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

US4683560A Microprocessor controlled focussing servo acquisition 失效
标题翻译：微处理器控制聚焦伺服采集
公开(公告)号：US4683560A
公开(公告)日：1987-07-28
申请号：US561631
申请日：1983-12-15
申请人： Toyoaki Takeuchi , Ken Ohshima , Hideyuki Kenjyo , Yoshiaki Ikeda , Masaharu Sakamoto
发明人： Toyoaki Takeuchi , Ken Ohshima , Hideyuki Kenjyo , Yoshiaki Ikeda , Masaharu Sakamoto
IPC分类号： G02B7/28 , G11B7/085 , G11B7/095
CPC分类号： G11B7/085
摘要： In an auto-focussing system, an actuator which moves together with an objective lens is vertically movable against a rotating optical disc and radiates a light beam so as to form a light spot on an information plane of the disc. A focus servo unit moves the actuator so that an optical distance between the actuator and the disc is within a proper distance region and performs the focus control of the light spot on the disc. While the actuator is approaching the optical disc, an auto-focus/focus servo controller initially makes the servo unit nonoperative and, when the actuator reaches a too-far position in a suitable servo loop distance region specified by a servo loop of the focus servo unit, the controller temporarily stops the movement of the actuator and then moves the actuator again from the too-far position by only a predetermined distance, thereby causing the actuator to be located within the focus loop distance region.
摘要翻译：在自动聚焦系统中，与物镜一起移动的致动器可以相对于旋转的光盘上下移动并且辐射光束，以在光盘的信息平面上形成光点。聚焦伺服单元使致动器移动，使得致动器和盘之间的光学距离在适当的距离区域内，并执行光盘上的光点的聚焦控制。当致动器接近光盘时，自动对焦/聚焦伺服控制器最初使得伺服单元不起作用，并且当致动器在由聚焦伺服的伺服环路指定的合适的伺服环路距离区域中达到太远位置时控制器暂时停止致动器的移动，然后使致动器再次从太远位置移动预定距离，从而使致动器位于聚焦环距离区域内。

10. 发明授权

US4508450A System for checking defects on a flat surface of an object 失效
标题翻译：用于检查物体平坦表面上的缺陷的系统
公开(公告)号：US4508450A
公开(公告)日：1985-04-02
申请号：US362621
申请日：1982-03-29
申请人： Ken Ohshima , Masaharu Sakamoto
发明人： Ken Ohshima , Masaharu Sakamoto
IPC分类号： G01N21/88 , G01N21/95 , G11B7/0037
CPC分类号： G01N21/9506 , G11B7/00375 , G01N2021/8861 , G01N2021/8874 , G01N21/9501 , G01N2201/1045
摘要： A checking system for checking defects on an optically flat surface of an object to be checked is adapted to spirally scan the surface of the object with a laser beam which is projected from an optical head. The laser beam is reflected from the surface of the object and converted by a photodetector to an electric signal. The level of the electric signal is compared with a reference level to produce a defect signal. The rotation of the object is detected by a position sensor. A counter counts a position signal in response to the defect signal and the contents of the counter is stored, as data representing a defect start position, in a defect position memory. The length data of the defect signal is counted and stored in a defect length memory. Predetermined defect position data is read out of a defect position memory, while defect length data corresponding to the defect position data is read out of the defect length memory. Position data associated with an area to be displayed is compared with defect position data. When both data coincide with each other, the corresponding defect length data is counted down. During the down count period, defect picture element data is stored in a refresh memory. The picture element data stored in the refresh memory is delivered to a CRT where it is displayed as defect data.
摘要翻译：用于检查待检查物体的光学平坦表面上的缺陷的检查系统适于用从光学头投影的激光束螺旋地扫描物体的表面。激光束从物体的表面反射并由光电检测器转换成电信号。将电信号的电平与参考电平进行比较以产生缺陷信号。物体的旋转由位置传感器检测。计数器响应于缺陷信号对位置信号进行计数，并且将计数器的内容作为表示缺陷开始位置的数据存储在缺陷位置存储器中。将缺陷信号的长度数据计数并存储在缺陷长度存储器中。从缺陷位置存储器中读出预定缺陷位置数据，同时从缺陷位置数据读出与缺陷位置数据对应的缺陷长度数据。与要显示的区域相关联的位置数据与缺陷位置数据进行比较。当两个数据彼此一致时，相应的缺陷长度数据被倒计数。在向下计数期间，将缺陷像素数据存储在刷新存储器中。存储在刷新存储器中的图像元素数据被传送到CRT，其被显示为缺陷数据。

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