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    • 111. 发明授权
    • Vibration-type gyro apparatus for calculating angular velocity
    • 用于计算角速度的振动型陀螺仪
    • US5821420A
    • 1998-10-13
    • US782968
    • 1997-01-14
    • Akihiro ChoTakeshi HojoShigeru NakamuraKazuteru Sato
    • Akihiro ChoTakeshi HojoShigeru NakamuraKazuteru Sato
    • G01P9/04G01C19/56G01P9/00
    • G01C19/5607
    • This invention relates to a vibration-type gyro apparatus for measuring an angular velocity using the Coriolis force exerted on a tuning fork. The tuning fork has two vibrational members symmetric about a Z axis. The two vibrational members vibrate along Z axis and are displaced along a Y axis by the Coriolis force. Each of the two vibrational members includes a cantilevered tabular member arranged along an XZ plane and has a shape symmetric about the center axis thereof. Electrode sections are formed on the two sides of the vibrational members, and electrodes are formed in the internal space of a casing at positions corresponding to the electrode sections. The electrodes are arranged by being deviated outward or inward of the center axis of the vibration members with respect to the electrode sections. Each of the electrodes is supplied with a displacement detection AC voltage and a control voltage from a detection and drive circuit.
    • 本发明涉及使用施加在音叉上的科里奥利力来测量角速度的振动型陀螺设备。 音叉具有关于Z轴对称的两个振动元件。 两个振动构件沿Z轴振动并沿着Y轴移动通过科里奥利力。 两个振动构件中的每一个包括沿着XZ平面布置并且具有围绕其中心轴线对称的形状的悬臂板状构件。 电极部形成在振动部件的两侧,电极形成在与电极部对应的位置的壳体的内部空间中。 电极通过相对于电极部分偏离振动部件的中心轴线的外侧或内侧而布置。 每个电极被提供有来自检测和驱动电路的位移检测AC电压和控制电压。
    • 118. 发明授权
    • Optical information processing apparatus
    • 光信息处理装置
    • US4815058A
    • 1989-03-21
    • US920423
    • 1986-10-20
    • Shigeru NakamuraYoshito Tsunoda
    • Shigeru NakamuraYoshito Tsunoda
    • G06K15/12G11B7/09G11B7/125H04N1/40H04N1/405G11B7/00
    • H04N1/40037G06K15/1204G11B7/0908G11B7/126
    • An optical information processing device comprises a semiconductor laser, and an optical system including an imaging lens having chromatic aberration for focusing laser light emitted by the semiconductor laser in the form of a spot on an information recording surface. The imaging lens serves for focusing the laser light at different positions along the optical axis for different wavelengths. The information processing device also includes an apparatus for producing relative displacements between the spot and the information recording surface, and an apparatus for varying the wavelength of the light emitted by the semiconductor laser with the device being characterized in that the imaging position of the spot is displaced along the optical axis depending on variations in wavelength of the light emitted by the semiconductor laser and the chromatic aberration of the imaging lens. The focusing control can be effected by driving the wavelength changing apparatus by using focal point detection signals. Further, it is possible to effect multigrade recording by driving the wavelength changing apparatus by multigrade information signals.
    • 光学信息处理装置包括半导体激光器和包括具有色差的成像透镜的光学系统,用于将由半导体激光器发射的激光以点的形式聚焦在信息记录表面上。 成像透镜用于将激光沿着不同波长的光轴聚焦在不同位置处。 所述信息处理装置还包括用于产生所述光斑和所述信息记录表面之间的相对位移的装置,以及用于改变所述半导体激光器发射的光的波长的装置,其特征在于,所述光点的成像位置为 取决于由半导体激光器发射的光的波长的变化和成像透镜的色差而沿着光轴移位。 可以通过使用焦点检测信号驱动波长改变装置来实现聚焦控制。 此外,可以通过多波段信息信号驱动波长改变装置来实现多级记录。