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    • 22. 发明申请
    • Collapsible lens barrel and optical instrument using the same
    • 可折叠镜筒和光学仪器使用相同
    • US20080106803A1
    • 2008-05-08
    • US11978429
    • 2007-10-29
    • Naoto YumikiYutaka Takahashi
    • Naoto YumikiYutaka Takahashi
    • G02B15/14
    • G02B7/102
    • A collapsible lens barrel includes a first holding frame (2) for holding a first lens group (L1), a second holding frame (5) for holding a second lens group (L2) that is disposed on an image plane side with respect to the first lens group (L1), an actuator (6) for moving the second holding frame 5 in an optical axis direction, and a tubular cam frame (17) including a plurality of cam grooves that are formed at substantially equal intervals around a circumferential direction for moving the first holding frame (2) in the optical axis direction. The actuator (6) is attached to a portion in the cam frame (17) where the cam grooves are not formed. The first lens group (L1) is moved using the cam grooves, and the second lens group (L2) is moved using the actuator (6), so that a faster zooming speed and a lower zooming noise can be achieved.
    • 可折叠透镜镜筒包括用于保持第一透镜组(L 1)的第一保持框架(2),用于保持第二透镜组(L 2)的第二保持框架(5),所述第二透镜组(L 2)相对于 到第一透镜组(L 1),用于沿光轴方向移动第二保持框架5的致动器(6)和包括以基本相等的间隔围绕形成的多个凸轮槽的管状凸轮框架(17) 用于使第一保持框架(2)沿光轴方向移动的圆周方向。 致动器(6)附接到凸轮框架(17)中未形成凸轮槽的部分。 使用凸轮槽移动第一透镜组(L 1),并且使用致动器(6)使第二透镜组(L 2)移动,从而可以实现更快的变焦速度和更低的变焦噪声。
    • 29. 发明授权
    • Fractional N frequency synthesizer
    • 分数N频率合成器
    • US06873213B2
    • 2005-03-29
    • US10261904
    • 2002-10-01
    • Kazutoshi TsudaYutaka Takahashi
    • Kazutoshi TsudaYutaka Takahashi
    • H03L7/197H03L7/08H03L7/18
    • H03L7/1976
    • A frequency synthesizer (100) that may have reduced spurious noise caused by a voltage controlled oscillator (VCO) (4) output sneaking into an input side of a phase comparison circuit (1) has been disclosed. A beat frequency component that may be generated by mixing of a portion of a VCO output sneaking into an input side of a phase comparison circuit (1) through a reference signal (REF) or a comparison signal (SIG) may be shifted to a high frequency region by providing a modulator circuit (7) on a reference signal side or a comparison signal side. Thus, a low pass filter circuit (3) may provide attenuation to the spurious noise. In this way, spurious noise in the VCO output may be reduced.
    • 已经公开了可以将输出潜入相位比较电路(1)的输入侧的压控振荡器(VCO)(4)引起的具有降低的杂散噪声的频率合成器(100)。 可以通过将参考信号(REF)或比较信号(SIG)混合到相位比较电路(1)的输入侧的VCO输出的一部分混合而产生的拍频分量可以移位到高 通过在参考信号侧或比较信号侧提供调制器电路(7)。 因此,低通滤波器电路(3)可以对伪噪声提供衰减。 以这种方式,可以减小VCO输出中的杂散噪声。