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    • 7. 发明授权
    • Apparatus and method for measuring residual stress and photoelastic effect of optical fiber
    • 用于测量光纤的残余应力和光弹效应的装置和方法
    • US06678433B2
    • 2004-01-13
    • US09939877
    • 2001-08-27
    • Jin-Han KimSung-Koog OhYong-Woo ParkUn-Chul PaekDug-Young Kim
    • Jin-Han KimSung-Koog OhYong-Woo ParkUn-Chul PaekDug-Young Kim
    • G02B626
    • G01M11/088G01L1/242
    • An apparatus and method for measuring residual stress and photoelastic effect of an optical fiber is disclosed. The apparatus includes a rotating light diffuser for providing temporally averaged uniform image by restraining spatial coherence of light emitted from a light source to be completely scattered, a collecting lens for aligning the light passed through the rotating light diffuser in an optical fiber, a linear birefringence device for linearly controlling the polarization state of the aligned light input from the collecting lens, a condenser for condensing the light passed through the linear birefringence device on a place where the optical fiber is located, a fixed polarizer for transforming the polarization state of the light passed through the optical fiber to the intensity distribution by allowing the light emitted from the linear birefringence device to transmit the optical fiber, an objective lens for obtaining a magnified optical fiber image having the intensity distribution of the light transmitted the optical fiber, and a unit for measuring transmittance variation given to the optical fiber depending on locations.
    • 公开了一种用于测量光纤的残余应力和光弹性效应的装置和方法。 该装置包括旋转光漫射器,用于通过抑制从光源发射的光完全散射的空间相干性来提供时间上均匀的图像,用于将通过旋转光扩散器的光对准在光纤中的聚光透镜,线性双折射 用于线性控制从收集透镜输入的对准光的偏振状态的装置,用于将通过线性双折射装置的光聚光在光纤所处的位置的聚光器,用于变换光的偏振状态的固定偏振器 通过允许从线性双折射装置发射的光透射光纤而使光纤通过光强分布,用于获得具有透射光纤的光的强度分布的放大光纤图像的物镜和单元 用于测量给予操作的透射率变化 取决于位置。
    • 10. 发明授权
    • Frequency multiplier
    • 倍频器
    • US07830184B2
    • 2010-11-09
    • US11659023
    • 2005-07-27
    • Chul-Woo KimJin-Han KimSeok-Ryung YoonYoung-Ho KwakSeok-Soo Yoon
    • Chul-Woo KimJin-Han KimSeok-Ryung YoonYoung-Ho KwakSeok-Soo Yoon
    • H03B19/00
    • G06F7/68
    • A frequency multiplier is disclosed. A plurality of voltage regulators each regulate levels of voltages at first and second common nodes in response to a corresponding one of input signals from a voltage-controlled delay line. An input buffer charges the first node or discharges the second node in response to a feedback signal. An output buffer regulates a level of a voltage at an output node and outputs a frequency-multiplied clock signal and the feedback signal corresponding to the voltage level of the output node. A discharge circuit discharges the first node before a rising edge of each of the input signals from the voltage-controlled delay line is inputted. A charge circuit charges the second node before the rising edge of each of the input signals from the voltage-controlled delay line is inputted.
    • 公开了一种倍频器。 多个电压调节器响应于来自电压控制延迟线的输入信号中的相应一个,调节第一和第二公共节点处的电压电平。 输入缓冲器对第一节点进行充电或响应于反馈信号对第二节点进行放电。 输出缓冲器调节输出节点处的电压电平,并输出倍频时钟信号和对应于输出节点电压电平的反馈信号。 在输入来自压控延迟线的每个输入信号的上升沿之前,放电电路对第一节点放电。 在输入来自压控延迟线的每个输入信号的上升沿之前,充电电路对第二节点充电。