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1.发明授权Fiber optic connector with improved loss performance and method for fabricating same 失效具有改进的损耗性能的光纤连接器及其制造方法
公开(公告)号：US5855503A
公开(公告)日：1999-01-05
申请号：US810115
申请日：1997-02-25
CPC分类号： G02B6/3821 , B24B19/226 , G02B6/3847 , G02B6/3863
摘要： An improved fiber optic cable connector is provided that exhibits a consistent return loss rating of -60 dB or better. The connector comprises matable connector housings that terminate the ends of respective optical cables to be joined. Within each housing, the optical fiber of the respective cable is secured within a ceramic ferrule that extends axially of the connector. The endface of each optical fiber is exposed at the end of its respective ferrule. The ends of the ferrules are ground and polished in such a way that the endfaces of the optical fibers exhibit a planar undercut with respect to the lip of the axial passageway in which the fibers are secured. When the ferrules are brought and pressed together end-to-end as the connectors are mated, the material of each ferrule compresses until the endfaces of the optical fibers engage each other with near null pressure. The result is the near elimination of pressure on the optical fiber itself, which avoids a density and index of refraction change at the junction and thus improves return loss performance. A method of fabricating such a fiber optic cable connector is also provided.
摘要翻译： 提供了一种改进的光纤电缆连接器，其具有-60dB或更好的一致的回波损耗等级。 连接器包括可连接的连接器壳体，其终止待连接的相应光缆的端部。 在每个外壳内，各个电缆的光纤被固定在一个陶瓷套圈内，该陶瓷套圈沿连接器的轴向延伸。 每个光纤的端面在其相应的套圈的端部露出。 套圈的端部被研磨和抛光，使得光纤的端面相对于固定有纤维的轴向通道的唇缘呈现平面底切。 当套圈在连接器配合时端对端地被按压在一起，每个套圈的材料压缩直到光纤的端面彼此接近无效的压力。 结果是近乎消除了光纤本身的压力，这避免了结处的密度和折射率变化，从而提高了回波损耗性能。 还提供了制造这种光纤电缆连接器的方法。
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公开(公告)号：US5923781A
公开(公告)日：1999-07-13
申请号：US577637
申请日：1995-12-22
CPC分类号： G06T7/0083 , G06T7/0046 , G06T7/0089 , G06T2207/10056 , G06T2207/20168 , G06T2207/30164
摘要： A segment detection system automatically, contactlessly, rapidly, and precisely detects a segment along an edge, such as a boundary, of an object in a digitized image. The segment detection system includes an imager for capturing an image of an object and converting the image into an electrical signal. A computer is connected to the camera for receiving the electrical signal. A machine vision system is associated with the computer and is adapted to analyze the image. A segment detection program is disposed in the computer for driving the computer and the machine vision system in accordance with the present invention. The segment detection program includes an initialization subroutine and a matching subroutine. The initialization subroutine configures the program to search for a particular target polynomial equation. The matching subroutine derives a test polynomial equation that represents a test segment from a test edge of the object based upon an analysis of the image. Further, the matching subroutine determines whether the test segment matches the target segment by comparing corresponding coefficients of the test polynomial equation and the target polynomial equation.
摘要翻译： 片段检测系统自动地，非接触地，快速地并且精确地检测沿着数字化图像中的物体的边缘（例如边界）的片段。 片段检测系统包括用于捕获对象的图像并将图像转换为电信号的成像器。 计算机连接到相机以接收电信号。 机器视觉系统与计算机相关联并且适于分析图像。 根据本发明，在计算机中设置段检测程序，用于驱动计算机和机器视觉系统。 段检测程序包括初始化子程序和匹配子例程。 初始化子程序配置程序以搜索特定的目标多项式方程。 匹配子程序基于对图像的分析，导出表示来自对象的测试边缘的测试段的测试多项式方程。 此外，匹配子程序通过比较测试多项式方程和目标多项式方程的对应系数来确定测试段是否与目标段匹配。
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3.发明授权Alignment and lighting system and method for aligning and lighting an object for an inspection system that contactlessly measures an offset of a central feature of the object 失效对准和照明系统和方法，用于对准和照明用于检查系统的物体，其非接触地测量物体的中心特征的偏移
公开(公告)号：US5657131A
公开(公告)日：1997-08-12
申请号：US510205
申请日：1995-08-02
CPC分类号： G02B6/3843 , G02B6/4221 , G02B6/4227
摘要： An alignment and lighting system aligns and lights an optical fiber termination so that an inspection system can measure the eccentricity of an optical fiber core relative to the termination. The inspection system has an imaging system comprising a feature imager and one or more boundary segment imagers but preferably four in number, a machine vision system connected to the imaging system, and an alignment and lighting system for aligning the termination with the imaging system and lighting the termination without having to launch light therethrough. The feature imager is positioned to capture an image of the fiber core endface, and the one or more boundary segment imagers are positioned to capture an image of a corresponding boundary segment of the termination endface. The machine vision system determines the offset, or eccentricity, based upon the feature image and the one or more boundary segment images. The alignment and lighting system includes an alignment apparatus and a unique lighting scheme. The alignment apparatus has a plurality of alignment arms that are spaced apart via spacings to form a cross-shaped aperture that is engaged with the termination endface. Light is projected toward the exposed regions at a light projection angle that is outside the light acceptance angle associated with the fiber core. As a result, light is not generally received by the core, and light is scattered within and reflects out from the fiber cladding and the termination support material surrounding the cladding.
摘要翻译： 对准和照明系统对准和点亮光纤终端，使得检查系统可以测量光纤芯相对于终端的偏心率。 检查系统具有成像系统，该成像系统包括特征成像器和一个或多个边界段成像器，但优选数量为四个，连接到成像系统的机器视觉系统，以及用于将终端对准成像系统和照明的对准和照明系统 终止而不必发射光。 特征成像器定位成捕获光纤核心端面的图像，并且一个或多个边界段成像器被定位成捕获终止端面的相应边界段的图像。 机器视觉系统基于特征图像和一个或多个边界段图像来确定偏移或偏心度。 对准和照明系统包括对准装置和独特的照明方案。 对准装置具有多个对准臂，其通过间隔间隔开以形成与终端端面接合的十字形孔。 光以与光纤芯相关联的光接收角之外的光投射角投射到曝光区域。 结果，光通常不被芯接收，并且光被散射在光纤包层和围绕包层的端接支撑材料内并从其中反射出来。
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4.发明授权Automatic inspection system for contactlessly measuring an offset of a central feature of an object 失效用于非接触地测量物体的中心特征的偏移的自动检查系统
公开(公告)号：US5729622A
公开(公告)日：1998-03-17
申请号：US510226
申请日：1995-08-02
CPC分类号： G02B6/3843 , G02B6/3807 , G02B6/4221 , G02B6/4227
摘要： An automatic inspection system contactlessly measures the offset of a feature of an object from a theoretical ideal center of the object, and is particularly suited for measuring at an endface of an optical fiber termination the eccentricity of an optical fiber core relative to a theoretical ideal center of the termination. The core is extremely smaller (typically between about 50 and 500 times) in size than the termination boundary. An inspection system has a feature imager, one or more boundary segment imagers but preferably four in number, and a machine vision system connected to the foregoing imagers. The feature imager is positioned to capture an image of the feature (e.g., fiber core endface), and the one or more boundary segment imagers are positioned to capture an image of a corresponding boundary segment of the object (e.g., termination endface). The machine vision system determines the offset, or eccentricity, based upon the feature image and the one or more boundary segment images.
摘要翻译： 自动检查系统非接触地测量物体的特征与物体的理论理想中心的偏移，特别适用于在光纤终端的端面处测量光纤芯相对于理论理想中心的偏心度 的终止。 核心尺寸比终端边界小得多（通常在大约50到500倍之间）。 检查系统具有特征成像器，一个或多个边界段成像器，但优选数量为四个，以及连接到前述成像器的机器视觉系统。 定位特征成像器以捕获特征（例如，光纤核心端面）的图像，并且定位一个或多个边界段成像器以捕获对象的对应边界段（例如，终止端面）的图像。 机器视觉系统基于特征图像和一个或多个边界段图像来确定偏移或偏心度。
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5.发明授权System and method for contactlessly and automatically determining the return loss of an optical fiber connector 失效用于非接触和自动地确定光纤连接器的回波损耗的系统和方法
公开(公告)号：US5671049A
公开(公告)日：1997-09-23
申请号：US668220
申请日：1996-06-21
CPC分类号： G02B6/3818 , G02B6/3807
摘要： A return loss determination system contactlessly and automatically determines a product-to-product return loss of an optical fiber connector having a domed optical fiber termination endface (i.e., an endface having an optical fiber and a surrounding support ferrule). The return loss determination system includes (a) an undercut/protrusion (U/P) inspection system for determining a U/P parameter corresponding with an offset of the fiber relative to a curvature of the ferrule along an axis of the fiber, (b) a dome polish eccentricity (DPE) inspection system for determining a DPE parameter corresponding with a displacement in a plane perpendicular to the axis between a curvature center of the curvature and a fiber center of the fiber, (c) a curvature radius (CR) inspection system for determining a CR parameter corresponding with a radius of the curvature relative to the curvature center, (d) a discontinuity inspection system for determining a discontinuity parameter to quantify surface discontinuities in the fiber, and (e) a return loss evaluation system for determining a return loss of the connector based upon the parameters.
摘要翻译： 回波损耗测定系统非接触地且自动地确定具有圆顶光纤终端端面（即，具有光纤和周围的支撑套圈的端面）的光纤连接器的产品回收损耗。 返回损耗确定系统包括：（a）用于根据光纤的轴线确定对应于光纤相对于套圈的曲率的偏移的U / P参数的底切/突出（U / P）检测系统，（b ）圆顶抛光偏心（DPE）检查系统，用于确定对应于垂直于曲率的曲率中心和纤维的纤维中心之间的轴的平面中的位移的DPE参数，（c）曲率半径（CR） 用于确定相对于曲率中心的曲率半径的CR参数的检查系统，（d）用于确定不连续参数以量化光纤中的表面不连续性的不连续性检查系统，以及（e）用于 基于参数确定连接器的回波损耗。
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6.发明授权System and method for contactlessly and automatically determining the insertion loss of an optical fiber connector 失效用于非接触地和自动地确定光纤连接器的插入损耗的系统和方法
公开(公告)号：US5862250A
公开(公告)日：1999-01-19
申请号：US754814
申请日：1996-11-21
CPC分类号： G02B6/3843 , G02B6/3807 , G02B6/4221 , G02B6/4227
摘要： An insertion loss determination system contactlessly and automatically determines an insertion loss of an optical fiber connector having a domed combination of an optical fiber and a surrounding support ferrule. The system is suitable for a fully automated connector assembly line. In structure, the system comprises (a) a core-to-ferrule eccentricity (CFE) inspection system configured to determine a CFE parameter corresponding with an offset between a fiber center and a ferrule center; (b) a fiber light intensity tester (FLIT) configured to determine a FLIT parameter corresponding with an amount of a reference light that fails to pass through the fiber; and (c) an insertion loss evaluation system configured to determine an insertion loss of the connector based upon the parameters. The evaluation system may further be configured to identify an insertion loss class, for example, very good, good, or bad, based upon the insertion loss.
摘要翻译： 插入损耗确定系统非接触地且自动地确定具有光纤和周围支撑套圈的圆顶组合的光纤连接器的插入损耗。 该系统适用于全自动连接器装配线。 在结构上，该系统包括：（a）芯 - 套圈偏心（CFE）检查系统，被配置为确定与光纤中心和套圈中心之间的偏移相对应的CFE参数; （b）纤维光强度测试器（FLIT），其被配置为确定与不能通过所述纤维的参考光的量对应的FLIT参数; 以及（c）插入损耗评估系统，被配置为基于所述参数来确定所述连接器的插入损耗。 评估系统还可以被配置为基于插入损耗来识别插入损耗等级，例如非常好，好或坏。
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公开(公告)号：US5809162A
公开(公告)日：1998-09-15
申请号：US577947
申请日：1995-12-22
CPC分类号： G02B6/3807 , G02B6/3818
摘要： A surface analysis system can contactlessly, automatically, and rapidly detect, classify, and evaluate a surface of an object, particularly, an optical fiber end face, for discontinuities to derive a single pass/fail conclusion regarding the surface. The surface analysis system has a scope for capturing an image of the end face. A computer is connected to the scope. A machine vision system is associated with the computer for receiving the image. A surface analysis program is associated with the computer for driving the machine vision system. The program searches for any discontinuities in the image by analyzing each pixel and a corresponding pixel structure of pixels to determine whether a discontinuity resides at each pixel. Discontinuities are classified as one of the following: binary thresholds, local gradients, and directional gradients. The pixel structure includes a plurality of pixels that were previously analyzed. The program determines whether the surface is continuous based upon any discovered discontinuities.
摘要翻译： 表面分析系统可以非接触地，自动地，快速地检测，分类和评估物体的表面，特别是光纤端面，用于不连续性导出关于表面的单一通过/不合格结论。 表面分析系统具有捕获端面图像的范围。 计算机已连接到作用域。 机器视觉系统与用于接收图像的计算机相关联。 表面分析程序与用于驱动机器视觉系统的计算机相关联。 该程序通过分析每个像素和像素的相应像素结构来搜索图像中的任何不连续性，以确定不连续性是否位于每个像素处。 不连续性被归类为以下之一：二进制阈值，局部梯度和定向梯度。 像素结构包括先前分析的多个像素。 该程序基于任何发现的不连续性来确定表面是否是连续的。
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公开(公告)号：US5887099A
公开(公告)日：1999-03-23
申请号：US942966
申请日：1997-10-03
CPC分类号： G02B6/3821 , G02B6/3847 , G02B6/3851 , G02B6/3863 , G02B6/3891
摘要： An improved fiber optic cable connector is provided that exhibits a consistent return loss rating of 60 dB or better. The connector comprises matable connector housings that terminate the ends of respective optical cables to be joined. Within each housing, the optical fiber of the respective cable is secured within a ceramic ferrule that extends axially of the connector. The endface of each optical fiber is exposed at the end of its respective ferrule. The ends of the ferrules are ground and polished in such a way that the endfaces of the optical fibers exhibit a planar undercut with respect to the lip of the axial passageway in which the fibers are secured. When the ferrules are brought and pressed together end-to-end as the connectors are mated, the material of each ferrule compresses until the endfaces of the optical fibers engage each other with near null pressure. The result is the near elimination of pressure on the optical fiber itself, which avoids a density and index of refraction change at the junction and thus improves return loss performance.
摘要翻译： 提供了一种改进的光缆连接器，其具有60dB或更好的一致的回波损耗等级。 连接器包括可连接的连接器壳体，其终止待连接的相应光缆的端部。 在每个外壳内，各个电缆的光纤被固定在一个陶瓷套圈内，该陶瓷套圈沿连接器的轴向延伸。 每个光纤的端面在其相应的套圈的端部露出。 套圈的端部被研磨和抛光，使得光纤的端面相对于固定有纤维的轴向通道的唇缘呈现平面底切。 当套圈在连接器配合时端对端地被按压在一起，每个套圈的材料压缩直到光纤的端面彼此接近无效的压力。 结果是近乎消除了光纤本身的压力，这避免了结处的密度和折射率变化，从而提高了回波损耗性能。
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9.发明授权Eccentricity determination system and method for accurately computing an offset of a central feature of an object 失效偏心确定系统和方法，用于准确计算物体中心特征的偏移
公开(公告)号：US5854852A
公开(公告)日：1998-12-29
申请号：US510225
申请日：1995-08-02
CPC分类号： G02B6/3843 , G02B6/4221 , G02B6/4227
摘要： An offset determination system and method permit accurate calculation of an offset of a central feature of an object. The offset determination system and method are particularly suited for, but not limited to, an automatic inspection system for determining the eccentricity of an optical fiber core relative to a theoretical ideal center of an optical fiber termination. The core is extremely smaller (typically between about 50 and 500 times) in size than the termination boundary. An inspection system has a feature imager, one or more boundary segment imagers but preferably four in number, and a machine vision system connected to the foregoing imagers. The feature imager is positioned to capture an image of the feature (e.g., fiber core endface), and the one or more boundary segment imagers are positioned to capture an image of a corresponding boundary segment of the object (e.g., termination endface). The machine vision system determines the offset, or eccentricity, based upon the feature image, the one or more boundary segment images, and the offset determination system and method.
摘要翻译： 偏移确定系统和方法允许精确计算物体的中心特征的偏移。 偏移确定系统和方法特别适用于但不限于用于确定光纤芯相对于光纤终端的理论理想中心的偏心度的自动检查系统。 核心尺寸比终端边界小得多（通常在大约50到500倍之间）。 检查系统具有特征成像器，一个或多个边界段成像器，但优选数量为四个，以及连接到前述成像器的机器视觉系统。 定位特征成像器以捕获特征（例如，光纤核心端面）的图像，并且定位一个或多个边界段成像器以捕获对象的对应边界段（例如，终止端面）的图像。 机器视觉系统基于特征图像，一个或多个边界段图像以及偏移确定系统和方法来确定偏移或偏心度。
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公开(公告)号：US5796894A
公开(公告)日：1998-08-18
申请号：US754948
申请日：1996-11-21
IPC分类号： G02B6/38
CPC分类号： G02B6/3821 , G02B6/3847 , G02B6/3851 , G02B6/3863 , G02B6/3891
摘要： An improved fiber optic cable connector is provided that exhibits a consistent return loss rating of 60 dB or better. The connector comprises matable connector housings that terminate the ends of respective optical cables to be joined. Within each housing, the optical fiber of the respective cable is secured within a ceramic ferrule that extends axially of the connector. The endface of each optical fiber is exposed at the end of its respective ferrule. The ends of the ferrules are ground and polished in such a way that the endfaces of the optical fibers exhibit a planar undercut with respect to the lip of the axial passageway in which the fibers are secured. When the ferrules are brought and pressed together end-to-end as the connectors are mated, the material of each ferrule compresses until the endfaces of the optical fibers engage each other with near null pressure. The result is the near elimination of pressure on the optical fiber itself, which avoids a density and index of refraction change at the junction and thus improves return loss performance.
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