专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

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

US4837757A Optical recording/reproducing device 失效
标题翻译：光记录/再现装置
公开(公告)号：US4837757A
公开(公告)日：1989-06-06
申请号：US891257
申请日：1986-07-28
申请人： Hiroo Okada , Yoshiaki Ikeda , Ken Ohsima
发明人： Hiroo Okada , Yoshiaki Ikeda , Ken Ohsima
IPC分类号： G11B7/085 , G11B7/09 , G11B7/12
CPC分类号： G11B7/08517 , G11B7/08529 , G11B7/08588 , G11B7/0946
摘要： An optical pickup is provided below an optical disk. A laser beam is emitted from a semiconductor laser onto a track, through an objective lens. The objective lens is capable of shifting, and is shifted in the direction of the track width by a magnetic force from a tracking actuator, thereby performing lens tracking. The optical pickup is mounted on a carriage. The carriage is shifted along the radial direction of the optical disk by a voice coil motor. This shifts the laser beam along the radial direction of the optical disk, thereby performing track access. Upon reception of an access command, a velocity control mode commences, and the shift velocity of the carriage is controlled in accordance with a velocity control signal corresponding to the distance between a target track and a current track. When the pickup arrives near the target track, the generation of velocity control signal ceases and the location control mode commences. When the carriage is deviated from the target track, its servo is adjusted in accordance with its deviation, by a location control signal. During velocity control of the carriage, a lens damping signal corresponding to the velocity control signal is supplied to the objective lens. After location control of the carriage commences, the lens damping signal corresponding to a location cotnrol signal is supplied to the objective lens until the velocity of the carriage falls below a predetermined value.
摘要翻译：在光盘下面设置光拾取器。激光束通过物镜从半导体激光器发射到轨道上。物镜能够移动，并且通过来自跟踪致动器的磁力在轨道宽度的方向上移动，从而进行透镜跟踪。光学拾取器安装在滑架上。滑架通过音圈马达沿着光盘的径向方向移动。这样沿着光盘的径向移动激光束，从而进行轨道通路。在接收到访问命令时，开始速度控制模式，并且根据对应于目标轨道和当前轨道之间的距离的速度控制信号来控制滑架的移动速度。当拾音器到达目标轨道附近时，速度控制信号的产生停止，位置控制模式开始。当滑架偏离目标轨道时，其伺服根据其偏差根据位置控制信号进行调节。在滑架的速度控制期间，将对应于速度控制信号的透镜阻尼信号提供给物镜。在开始滑架的定位控制之后，将对应于位置辅助信号的镜头阻尼信号提供给物镜，直到滑架的速度降到预定值以下。

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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式