High precision measurement of refractive index profile of cylindrical glass bodies

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	High precision measurement of refractive index profile of cylindrical glass bodies
其他题名	High precision measurement of refractive index profile of cylindrical glass bodies
	COOK, IAN DAVID; FONTAINE, NORMAN HENRY; GOLLIER, JACQUES; WU, QI
	2016-05-06
专利权人	CORNING INCORPORATED
公开日期	2016-05-06
授权国家	世界知识产权组织
专利类型	发明申请
摘要	According to some embodiments a method of measuring the refractive index profile of a consolidated glass body having a cylindrical surface comprises the steps of: (a) forming an image of a slit behind the glass body; (b) optionally pre-scanning the cylindrical surface of the test glass body or a reference glass body and analyzing the data within a fixed window to determine the likely location of the zero-order, un-diffracted beam while ignoring other diffracted beams; (c) optionally adjusting the optical power to improve the intensity of the data within the fixed window in order to improve the analysis; (d) predicting the trajectory of the zero-order beam through the preform based on the sampling location xi (incidence position) of the light impinging on the cylindrical surface and the location at which the zero-order beam impinges on the detector; (e) measuring the cylindrical surface of a glass body while using the estimated location of the zero-order beam and adjusted optical power to set the center of a floating window and the beam power at each measurement point; (e) determining deflection angles of the exiting zero-order beam within the floating window at each sampling location; (e) calculating the refractive index profile of glass body by utilizing a transformation function which determines refractive index at each location based upon the measured deflection angle function of the beam.
其他摘要	根据一些实施例，测量具有圆柱形表面的固结玻璃体的折射率分布的方法包括以下步骤：（a）在玻璃体后面形成狭缝的图像; （b）可选择预先扫描测试玻璃体或参考玻璃体的圆柱形表面，并在固定窗口内分析数据，以确定零级非衍射光束的可能位置，同时忽略其他衍射光束; （c）可选择调整光功率以改善固定窗口内数据的强度，以改善分析; （d）基于照射在圆柱表面上的光的采样位置xi（入射位置）和零级光束照射到检测器上的位置，预测通过预制棒的零级光束的轨迹; （e）测量玻璃体的圆柱表面，同时使用零级光束的估计位置和调整的光功率来设置浮动窗口的中心和每个测量点处的光束功率; （e）确定每个采样位置处浮动窗口内的出射零级光束的偏转角度; （e）通过利用变换函数计算玻璃体的折射率分布，该变换函数基于所测量的光束的偏转角函数确定每个位置处的折射率。
主权项	A method of measuring the refractive index profile of a consolidated glass body with a cylindrical surface, the method comprising the steps of: a. scanning the cylindrical surface of the consolidated glass body using an optical beam that emanates from an aperture, such that an image of the aperture is formed downstream from the consolidated glass body, between the consolidated glass body and at least one optical detector, and sampling the cylindrical surface with the optical beam at multiple sampling locations ¾; b. detecting locations where zero-order optical beams corresponding to the sampling locations x; impinge on at least one optical detector after passing through the consolidated glass body; c. determining deflection angles of the zero -order beams corresponding to the multiple sampling locations x;; d. calculating the refractive index profile of the consolidated glass body based on the deflection angles of the zero-order optical beams corresponding to the multiple sampling locations.
申请日期	2015-10-29
专利号	WO2016069832A1
专利状态	未确认
申请号	PCT/US2015/057941
公开（公告）号	WO2016069832A1
IPC 分类号	G01N21/41 \| G01M11/00
专利代理人	SHORT, SVETLANA Z.
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/62558
专题	半导体激光器专利数据库
作者单位	CORNING INCORPORATED
推荐引用方式 GB/T 7714	COOK, IAN DAVID,FONTAINE, NORMAN HENRY,GOLLIER, JACQUES,et al. High precision measurement of refractive index profile of cylindrical glass bodies. WO2016069832A1[P]. 2016-05-06.