公开(公告)号：US5422714A

公开(公告)日：1995-06-06

申请号：US72118

申请日：1993-06-07

申请人： David R. Fladd

发明人： David R. Fladd

IPC分类号： G01M11/00 ,  G01N21/03 ,  G01N21/41 ,  G01N21/45

CPC分类号： G01N21/45

摘要： A device for quickly and accurately comparing the refractive index of an optical immersion liquid with the refractive index of a reference glass that the liquid is to be used with. The device comprises a cavity to at least partially contain the immersion liquid by the reference glass. The containment may be total, as in a hollow core, or may be between two windows composed of the reference glass and assembled in a spaced, facing relationship, one window having an inner face with a plano portion and a portion with a continuous slope, and a cavity intermediate the windows to contain the liquid being compared. The cavity is then filled with the liquid to be compared, transmitting laser light through the windows and the liquid to form an optical interference pattern. The method comprises filling the cavity in the device with the liquid being compared, allowing the unit to reach thermal equilibrium, inserting the device in the working path of an interferometer and transmitting laser light through the windows and liquid to create an optical interference pattern, measuring the optical path difference (OPD) shown by the pattern and determining the difference in refractive index An from the formula ##EQU1## where .DELTA.T is the depth or height of the slope in the one window.

摘要翻译： 一种用于将光浸液的折射率与液体与其一起使用的参考玻璃的折射率快速准确地比较的装置。 该装置包括用于参考玻璃至少部分地容纳浸没液体的空腔。 容纳物可以是总的，如在空心芯中，或者可以在由参考玻璃构成的两个窗口之间并且以间隔开的面对关系组装，一个窗口具有带有平面部分的内表面和具有连续斜面的部分， 并且在窗口中间的腔体中容纳被比较的液体。 然后用待比较的液体填充空腔，通过窗口和液体传输激光以形成光学干涉图案。 该方法包括将液体填充到装置中，使液体进行比较，允许单元达到热平衡，将装置插入干涉仪的工作路径中，并通过窗口和液体传输激光以产生光学干涉图案，测量 通过图案示出的光程差（OPD），并根据公式确定折射率An的差异，其中DELTA T是一个窗口中斜率的深度或高度。

公开(公告)号：US5764345A

公开(公告)日：1998-06-09

申请号：US710093

申请日：1996-09-11

申请人： David R. Fladd ,  Stephen J. Rieks

发明人： David R. Fladd ,  Stephen J. Rieks

IPC分类号： G01B9/02 ,  G01B11/00 ,  G01M11/02 ,  G01N21/45 ,  G01N21/88 ,  G01N21/896 ,  G01N21/93 ,  G01N21/958 ,  G03F7/20 ,  G01L1/24 ,  G06G7/12

CPC分类号： G01N21/958 ,  G01M11/0242 ,  G01M11/0271 ,  G01N21/455 ,  G03F7/70591 ,  G03F7/706 ,  G03F7/70958

摘要： A process for detecting inhomogeneities, specifically, striae in a sample of fused silica glass is provided which includes the steps of: preparing a digitized phase plot for the sample using an interferometer which produces a beam of light which passes through the sample; applying a high pass filter to the phase plot to remove the effects of the sample's bulk properties; applying a statistical filter to the high pass filtered data to remove outlying data points; and column averaging the statistically filtered data. If present, striae can be readily detected in the column averaged, statistically filtered data.

摘要翻译： 提供了一种用于检测不均匀性的方法，特别是熔融石英玻璃样品中的条纹，其包括以下步骤：使用产生穿过样品的光束的干涉仪来准备样品的数字化相位图; 对相图施加高通滤波器以消除样品体积特性的影响; 对高通滤波数据应用统计滤波器以去除外围数据点; 并对统计滤波数据进行平均。 如果存在，则可以在列平均，统计学过滤的数据中容易地检测到条纹。

公开(公告)号：US07307714B2

公开(公告)日：2007-12-11

申请号：US11133889

申请日：2005-05-20

申请人： David G. Cyr ,  Christopher P. Daigler ,  David R. Fladd ,  David C. Jenne ,  Albert R. Nieber ,  Nikki Jo Russo ,  Paul J. Shustack

发明人： David G. Cyr ,  Christopher P. Daigler ,  David R. Fladd ,  David C. Jenne ,  Albert R. Nieber ,  Nikki Jo Russo ,  Paul J. Shustack

IPC分类号： G01N21/88

CPC分类号： G01N21/958 ,  G01N21/8803

摘要： Disclosed are process and apparatus for inspecting internal inclusions in internally transmissive substrates. The process involves applying a black coating to one major surface of the substrate, submerging the substrate in a refractive index-matching fluid, and scanning the substrate with a collimated light beam. The scattered light signals produced by the inclusions can be detected by the human eye or by using a light detector. By the use of index-matching fluid and the black coating, the signal-to-noise ratio of the process and apparatus are enhanced. A preferred black coating is one cured from an electron beam or photo polymerizable coating composition applied to the major surface. The process and apparatus are particularly suitable for inspecting internal inclusions in an internally transmissive substrate having considerable amount of surface defects or contoured surface that prevent it from inspection in a gas medium.

摘要翻译： 公开了用于检查内部透射性基板中的内部夹杂物的工艺和装置。 该方法包括将黑色涂层施加到基底的一个主表面，将基底浸没在折射率匹配流体中，并用准直光束扫描基底。 由夹杂物产生的散射光信号可以由人眼或使用光检测器检测。 通过使用折射率匹配流体和黑色涂层，可以提高工艺和装置的信噪比。 优选的黑色涂层是从施加到主表面的电子束或光聚合涂层组合物固化的。 该方法和装置特别适用于检查内部透射基底中的内部夹杂物，其具有相当大量的表面缺陷或轮廓表面，从而阻止其在气体介质中检查。