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    • 36. 发明授权
    • Optical information recording and reproducing apparatus
    • 光信息记录和再现装置
    • US4890274A
    • 1989-12-26
    • US196827
    • 1988-05-20
    • Nobuyuki KanekoKiichi Kato
    • Nobuyuki KanekoKiichi Kato
    • G11B7/09
    • G11B7/094G11B7/0941
    • In an optical information recording and reproducing apparatus for recording and reproducing information by controlling the focus of an optical system for condensing and projecting lights of a light source onto a recording medium, an offset part produced in case the lights are condensed and projected in a focus servo state in data writing regions in the recording medium and prepit regions which are adjacent to the data writing regions and in which discriminating codes are written is detected in the respective format regions by a format detecting means and an offset fluctuation controlling voltage is impressed on the basis of this detecting signal to inhibit the fluctuation of the offset in the respective regions of different formats.
    • 在用于通过控制用于将光源的光聚光和投射到记录介质上的光学系统的焦点来记录和再现信息的光学信息记录和再现装置中,在光被聚焦并投影到焦点的情况下产生的偏移部分 记录介质中的数据写入区域中的伺服状态和与数据写入区域相邻并且其中写入鉴别码的预制凹坑区域中的伺服状态通过格式检测装置在各个格式区域中被检测,并且偏移波动控制电压施加在 该检测信号的基础来抑制不同格式的各个区域中的偏移的波动。
    • 37. 发明授权
    • Optical memory device with means for detecting erroneous data writing
    • 具有用于检测错误数据写入的装置的光学存储器件
    • US4554654A
    • 1985-11-19
    • US454262
    • 1982-12-29
    • Kiichi Kato
    • Kiichi Kato
    • G11B7/135G11B7/0045G11B7/13G11B20/18G11B27/36G11B7/00
    • G11B20/1879G11B27/36G11B7/0045G11B7/13
    • An optical memory device comprises a modulator for modulating a laser beam in accordance with recording data, an objective lens for focusing the output light beam from the modulator on a recording medium, a sensor arranged in the far field of the objective lens, and a judging circuit for detecting an erroneous writing operation in accordance with an output from the sensor and the recording data. The sensor has a square detecting surface divided into four segments by lines which form angles of .+-.45.degree. with respect to the direction of relative movement between the recording medium and the focused light beam. The difference between the sums of outputs from two pairs of opposing segments is supplied to the judging circuit.
    • 一种光学存储器件包括用于根据记录数据调制激光束的调制器,用于将来自调制器的输出光束聚焦在记录介质上的物镜,布置在物镜的远场中的传感器,以及判断 电路,用于根据来自传感器的输出和记录数据来检测错误的写入操作。 该传感器具有一个方形检测表面,该方形检测表面被分成四段,相对于记录介质和聚焦光束之间相对移动的方向形成+/- 45°角。 来自两对相对的段的输出的和之间的差被提供给判断电路。
    • 38. 发明授权
    • Method and apparatus for detecting focussing and tracking error signals
    • 用于检测聚焦和跟踪误差信号的方法和装置
    • US4525825A
    • 1985-06-25
    • US309402
    • 1981-10-07
    • Kenichi ItoTohru MushaKiichi KatoKimiaki Yamamoto
    • Kenichi ItoTohru MushaKiichi KatoKimiaki Yamamoto
    • G11B7/09G11B7/08
    • G11B7/09
    • A method and an apparatus for detecting a focussing error signal and a tracking error signal of an objective lens with respect to an information track of a video disc on which a reading light spot is focussed by the objective lens includes a detection prism having a reflection surface which is set substantially at a critical angle and a light detector for receiving the light flux reflected by the reflection surface. The light detector is arranged in a far field of the track and having four light receiving regions divided along two orthogonal directions. The focussing error signal is derived as a difference between output signals from the regions aligned in a track direction and the tracking error signal is derived as a difference between output signals from the regions aligned in a direction perpendicular to the track direction. An information signal is obtained as a sum of the output signals from the four regions.
    • 一种用于检测物镜的聚焦误差信号和跟踪误差信号相对于其上由物镜聚焦的视频光盘的信息轨道的方法和装置,包括具有反射面的检测棱镜 其基本上设置为临界角,以及光检测器,用于接收由反射表面反射的光束。 光检测器布置在轨道的远场中,具有沿两个正交方向分开的四个光接收区域。 聚焦误差信号被导出为来自沿轨道方向对齐的区域的输出信号之间的差异,并且跟踪误差信号被导出为在垂直于磁道方向的方向上排列的区域的输出信号之间的差。 获得信息信号作为来自四个区域的输出信号的和。
    • 40. 发明授权
    • Optical tomography system
    • 光学断层扫描系统
    • US07593626B2
    • 2009-09-22
    • US11529437
    • 2006-09-29
    • Kiichi Kato
    • Kiichi Kato
    • A61B1/04G01B9/02
    • A61B5/0073A61B5/0066G01B9/02003G01B9/02004G01B9/02029G01B9/02044G01B9/0205G01B9/02068G01B9/02091G01N21/45G01N21/4795G01N2021/1787
    • Light emitted from the light source unit divided into measuring light and reference light. An optical path length of the measuring light or the reference light is adjusted and a probe guides the measuring light to an object. The reflected light from the object when the measuring light is projected onto the object and the reference light are multiplexed. Interference light of the reflected light and the reference light which have been multiplexed is detected, and a tomographic image of the object is obtained on the basis of the interference light. The probe is provided with a distance measuring circuit for measuring the distance from the probe to the object, and the optical path length of the measuring light or the reference light is adjusted by the use of the distance to the object measured by the distance measuring circuit to adjust the tomographic image obtainment initiating position.
    • 从光源单元发射的光分为测量光和参考光。 测量光或参考光的光程长度被调节,并且探针将测量光引导到物体上。 当将测量光投射到物体上时来自物体的反射光和参考光被复用。 检测已被多路复用的反射光和参考光的干涉光,并根据干涉光获得目标的断层图像。 探头设置有用于测量从探针到物体的距离的距离测量电路,并且通过使用距离测量电路测量到的物体的距离来调节测量光或参考光的光程长度 调整断层图像获取起始位置。