公开(公告)号：US06813959B2

公开(公告)日：2004-11-09

申请号：US10434490

申请日：2003-05-08

申请人： Dug-Young Kim ,  Yong-Woo Park ,  Un-Chul Paek ,  Mun-Hyun Do

发明人： Dug-Young Kim ,  Yong-Woo Park ,  Un-Chul Paek ,  Mun-Hyun Do

IPC分类号： G01L124

CPC分类号： G01L1/242 ,  G01L5/0047

摘要： Disclosed is an apparatus for measuring a residual stress and a photoelastic effect of an optical fiber, which includes: a light source; a rotary type optical diffuser distanced from the light source in a predetermined distance for suppressing the spatial coherence of a light radiated in the light source; an optical condenser for condensing the radiated light passed through the optical diffuser into a spot where the optical fiber is located; a polarizer for polarizing the light passed through the optical condenser into a 45° linear polarized light from an axis of the optical fiber; a polarization analyzer, installed at 90° angle with respect to the polariscope and attached closely with the optical fiber, to prevent the penetration by the background image of the optical fiber; an optical fiber strain unit including a strain sensor for straining the optical fiber on the polarization analyzer toward a longitudinal direction and measuring the strain on the optical fiber; an object lens for magnifying the image of the light penetrated through the optical fiber; and a charge coupled device(CCD) array for measuring the penetration variation of the optical fiber caused from the strain caused by the optical fiber strain unit over the optical fiber.

公开(公告)号：US06647162B2

公开(公告)日：2003-11-11

申请号：US09803873

申请日：2001-03-13

申请人： Dug-Young Kim ,  Yong-Woo Park ,  Un-Chul Paek ,  Mun-Hyun Do

发明人： Dug-Young Kim ,  Yong-Woo Park ,  Un-Chul Paek ,  Mun-Hyun Do

IPC分类号： G01N2100

CPC分类号： G01L1/242 ,  G01L5/0047

摘要： Disclosed is an apparatus for measuring a residual stress and a photoelastic effect of an optical fiber, which includes: a light source; a rotary type optical diffuser distanced from the light source in a predetermined distance for suppressing the spatial coherence of a light radiated in the light source; an optical condenser for condensing the radiated light passed through the optical diffuser into a spot where the optical fiber is located; a polarizer for polarizing the light passed through the optical condenser into a 45° linear polarized light from an axis of the optical fiber; a polarization analyzer, installed at 90° angle with respect to the polariscope and attached closely with the optical fiber, to prevent the penetration by the background image of the optical fiber; an optical fiber strain unit including a strain sensor for straining the optical fiber on the polarization analyzer toward a longitudinal direction and measuring the strain on the optical fiber; an object lens for magnifying the image of the light penetrated through the optical fiber; and a charge coupled device (CCD) array for measuring the penetration variation of the optical fiber caused from the strain caused by the optical fiber strain unit over the optical fiber.

摘要翻译： 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，其包括：光源; 旋转型光学扩散器，其以预定距离从光源远离，以抑制在光源中照射的光的空间相干性; 用于将通过光漫射器的辐射光聚光到光纤所在的光点的光学冷凝器; 用于将通过所述光学冷凝器的光偏振成从所述光纤的轴线成45°线偏振光的偏振器; 极化分析仪，相对于偏振器安装在90°角并与光纤紧密连接，以防止光纤的背景图像穿透; 光纤应变单元，包括：应变传感器，用于使所述偏振分析仪上的光纤向纵向拉伸;测量所述光纤上的应变; 用于放大穿过光纤的光的图像的物镜; 以及用于测量由光纤应变单元在光纤上引起的应变引起的光纤的穿透变化的电荷耦合器件（CCD）阵列。

公开(公告)号：US06678433B2

公开(公告)日：2004-01-13

申请号：US09939877

申请日：2001-08-27

申请人： Jin-Han Kim ,  Sung-Koog Oh ,  Yong-Woo Park ,  Un-Chul Paek ,  Dug-Young Kim

发明人： Jin-Han Kim ,  Sung-Koog Oh ,  Yong-Woo Park ,  Un-Chul Paek ,  Dug-Young Kim

IPC分类号： G02B626

CPC分类号： G01M11/088 ,  G01L1/242

摘要： 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.

摘要翻译： 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。

公开(公告)号：US06373564B1

公开(公告)日：2002-04-16

申请号：US09838022

申请日：2001-04-19

申请人： Yong-Woo Park ,  Dug-Young Kim ,  Un-Chul Paek

发明人： Yong-Woo Park ,  Dug-Young Kim ,  Un-Chul Paek

IPC分类号： G01N2100

CPC分类号： G01M11/37

摘要： The present invention relates generally to an image tracking device in an optical communication system, and in particular, to a device and method for measuring the transverse characteristics, including the refractive index or residual stress of an optical fiber or a fiber preform.

摘要翻译： 本发明一般涉及光通信系统中的图像跟踪装置，特别涉及用于测量包括光纤或纤维预制棒的折射率或残余应力的横向特性的装置和方法。