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    • 21. 发明授权
    • Microprocessor controlled focussing servo acquisition
    • 微处理器控制聚焦伺服采集
    • US4683560A
    • 1987-07-28
    • US561631
    • 1983-12-15
    • Toyoaki TakeuchiKen OhshimaHideyuki KenjyoYoshiaki IkedaMasaharu Sakamoto
    • Toyoaki TakeuchiKen OhshimaHideyuki KenjyoYoshiaki IkedaMasaharu Sakamoto
    • G02B7/28G11B7/085G11B7/095
    • G11B7/085
    • 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.
    • 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。
    • 23. 发明授权
    • System for checking defects on a flat surface of an object
    • 用于检查物体平坦表面上的缺陷的系统
    • US4508450A
    • 1985-04-02
    • US362621
    • 1982-03-29
    • Ken OhshimaMasaharu Sakamoto
    • Ken OhshimaMasaharu Sakamoto
    • G01N21/88G01N21/95G11B7/0037
    • G01N21/9506G11B7/00375G01N2021/8861G01N2021/8874G01N21/9501G01N2201/1045
    • 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.
    • 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。
    • 24. 发明授权
    • Apparatus for detecting optically defects
    • 用于检测光学缺陷的设备
    • US4464050A
    • 1984-08-07
    • US345153
    • 1982-02-02
    • Kiichi KatoMasaharu SakamotoShoji YoshikawaKunio YamamiyaHiroshi KodamaKen Ohsima
    • Kiichi KatoMasaharu SakamotoShoji YoshikawaKunio YamamiyaHiroshi KodamaKen Ohsima
    • G01N21/88G01N21/95G01N21/956G11B7/0037G11B7/26H01L21/66
    • G11B7/00375G01N21/9506
    • 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.
    • 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。
    • 27. 发明授权
    • Managing device keys in cryptographic communication
    • 管理加密通信中的设备密钥
    • US07593528B2
    • 2009-09-22
    • US11853932
    • 2007-09-12
    • Kohichi KamijohMasaharu Sakamoto
    • Kohichi KamijohMasaharu Sakamoto
    • H04L9/12
    • H04L9/0836H04L2209/601
    • To delegate authority for cryptographic communication without increasing the risk of leaking a device key. A system and method including a first communication apparatus and a managing apparatus allowing the first communication apparatus to perform cryptographic communication with an external at least one second communication apparatus. The managing apparatus includes: storing a first device key shared with the second communication apparatus; generating a computation by passing the first device key read from the stored keys to a keyed one-way function, to generate a computed result as a second device key; and outputting the second device key and a key of the one-way function to the first communication apparatus. The first communication apparatus transmits a key of a one-way function to the second communication apparatus causing the second communication apparatus to perform a computation which generates a second device key, and which performs a cryptographic communication with a second communication apparatus.
    • 授权加密通信,而不增加泄漏设备密钥的风险。 一种包括第一通信装置和管理装置的系统和方法,其允许第一通信装置与外部至少一个第二通信装置执行密码通信。 管理装置包括:存储与第二通信装置共享的第一装置密钥; 通过将从所存储的密钥读取的第一设备密钥传递到键控单向功能来生成计算,以生成计算结果作为第二设备密钥; 以及将所述第二设备密钥和所述单向功能的密钥输出到所述第一通信设备。 第一通信装置向第二通信装置发送单向功能的密钥,使得第二通信装置执行产生第二装置密钥的计算,并且执行与第二通信装置的密码通信。