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公开(公告)号：US20200333200A1
公开(公告)日：2020-10-22
申请号：US16921107
申请日：2020-07-06
Applicant: CORNING INCORPORATED
Inventor： Ryan Claude Andrews , Chai Hsin Kuang , Rostislav Vatchev Roussev
Abstract: The prism-coupling systems and methods include using a prism-coupling system to collect initial TM and TE mode spectra of a chemically strengthened article having a refractive index profile with a near-surface spike region and a deep region. The initial TM and TE mode spectra are examined to see if they fall within a preferred measurement window that can produce an accurate estimate of the knee stress to within a select tolerance. If not, then measurement configuration of the prism-coupling system is changed and new TM and TE mode spectra are collected. This process is repeated until the new TM and TE mode spectra fall within the preferred measurement window. The new TM and TE mode spectra are then used to determine the knee stress. Changing the measurement configuration can include changing at least one of the measurement wavelength, interfacing fluid thickness and interfacing fluid refractive index.
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32.发明申请公开(公告)号：US20200300615A1
公开(公告)日：2020-09-24
申请号：US16825338
申请日：2020-03-20
Applicant: CORNING INCORPORATED
Inventor： Ryan Claude Andrews , Pierre Michel Bouzi , William John Furnas , Jeremiah Robert Jacobson , Glenn Abram Newcomer , Evan Lewis Olson , Babak Robert Raj , Rostislav Vatchev Roussev , Viktor Stepanov , Nathaniel David Wetmore
Abstract: The hybrid measurement system includes an evanescent prism coupling spectroscopy (EPCS) sub-system and a light-scattering polarimetry (LSP) sub-system. The EPCS sub-system includes an EPCS light source optically coupled to an EPCS detector system through an EPCS coupling prism. The LSP sub-system includes an LSP light source optically coupled to an optical compensator, which in turn is optically coupled to a LSP detector system via a LSP coupling prism. A support structure supports the EPCS and LSP coupling prisms to define a coupling prism assembly, which supports the two prisms at a measurement location. Stress measurements made using the EPCS and LSP sub-systems are combined to fully characterize the stress properties of a transparent chemically strengthened substrate. Methods of processing the EPCS and LSP measurements to improve measurement accuracy are also disclosed.
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公开(公告)号：US20200278254A1
公开(公告)日：2020-09-03
申请号：US16804219
申请日：2020-02-28
Applicant: Corning Incorporated
Inventor： Chong Pyung An , Ryan Claude Andrews , Galan Gregory Moore , Rohit Rai , Erika Lynn Stapleton , Ljerka Ukrainczyk
Abstract: A method for determining crystal phases of a glass ceramic sample, including the steps of applying energy to the sample using an excitation source, detecting raw Raman spectral energy that is given off by the sample using a detector, wherein the raw Raman spectral energy includes peak values, determining a plurality of predetermined energy peaks based off a composition of the sample, superimposing the plurality of predetermined energy peaks over the raw Raman spectral energy, applying a baseline value between each predetermined energy peak, subtracting the baseline value from the raw Raman spectral energy, calculating corrected peak values based on the raw Raman spectral energy and baseline value, and determining the crystal phases of the glass ceramic sample based on the corrected peak values.
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Patent Agency Ranking
34.发明申请公开(公告)号：US20190389764A1
公开(公告)日：2019-12-26
申请号：US15750051
申请日：2017-02-02
Applicant: CORNING INCORPORATED
Inventor： Ryan Claude Andrews , Jill Marie Hall , Pascale Oram , Rostislav Vatchev Roussev , Vitor Marino Schneider , Ljerka Ukrainczyk
Abstract: A method of reworking lithium containing ion exchanged glass articles is provided. The method includes a reverse ion exchange process that returns the glass article to approximately the composition of the glass from which the glass article was produced, before being subjected to ion exchange. The reworked glass articles exhibit a K2O concentration profile comprising a portion wherein a K2O concentration increases to a local K2O concentration maximum.
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35.发明申请公开(公告)号：US20190310228A1
公开(公告)日：2019-10-10
申请号：US16296560
申请日：2019-03-08
Applicant: CORNING INCORPORATED
Abstract: Methods of characterizing ion-exchanged chemically strengthened glass containing lithium are disclosed. The methods allow for performing quality control of the stress profile in chemically strengthened Li-containing glasses having a surface stress spike produced in a potassium-containing salt, especially in a salt having both potassium and sodium. The method allows the measurement of the surface compression and the depth of the spike, and its contribution to the center tension, as well as the compression at the bottom of the spike, and the total center tension and calculation of the stress at the knee where the spike and the deep region of the stress profile intersect. The measurements are for a commercially important profile that is near-parabolic in shape in most of the interior of the substrate apart from the spike.
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36.发明授权公开(公告)号：US10234422B2
公开(公告)日：2019-03-19
申请号：US15898948
申请日：2018-02-19
Applicant: CORNING INCORPORATED
Abstract: Methods of characterizing ion-exchanged chemically strengthened glass containing lithium are disclosed. The methods allow for performing quality control of the stress profile in chemically strengthened Li-containing glasses having a surface stress spike produced in a potassium-containing salt, especially in a salt having both potassium and sodium. The method allows the measurement of the surface compression and the depth of the spike, and its contribution to the center tension, as well as the compression at the bottom of the spike, and the total center tension and calculation of the stress at the knee where the spike and the deep region of the stress profile intersect. The measurements are for a commercially important profile that is near-parabolic in shape in most of the interior of the substrate apart from the spike.
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37.发明申请公开(公告)号：US20190033144A1
公开(公告)日：2019-01-31
申请号：US16015776
申请日：2018-06-22
Applicant: CORNING INCORPORATED
IPC: G01L1/24 , G01N21/552 , C03C21/00
Abstract: Methods of improving the measurement of knee stress in an ion-exchanged chemically strengthened Li-containing glass sample that includes a knee are disclosed. One of the methods includes compensating for a shift in the location of the TIR-PR transition location associated with the critical angle location, wherein the shift is due to the presence of a leaky mode. Another method includes applying select criteria to the captured mode spectra image to ensure a high-quality image is used for the knee stress calculation. Another method combines direct and indirect measurements of the knee stress using the mode spectra from multiple samples to obtain greater accuracy and precision as compared to using either the direct measurement method or the indirect measurement method alone. Quality control methods of forming the glass samples using measured mode spectra and related techniques for ensuring an accurate measurement of the knee stress are also disclosed.
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38.发明申请公开(公告)号：US20180172634A1
公开(公告)日：2018-06-21
申请号：US15898948
申请日：2018-02-19
Applicant: CORNING INCORPORATED
CPC classification number: G01N27/60 , C03C21/002 , G01N27/72 , G01N33/386
Abstract: Methods of characterizing ion-exchanged chemically strengthened glass containing lithium are disclosed. The methods allow for performing quality control of the stress profile in chemically strengthened Li-containing glasses having a surface stress spike produced in a potassium-containing salt, especially in a salt having both potassium and sodium. The method allows the measurement of the surface compression and the depth of the spike, and its contribution to the center tension, as well as the compression at the bottom of the spike, and the total center tension and calculation of the stress at the knee where the spike and the deep region of the stress profile intersect. The measurements are for a commercially important profile that is near-parabolic in shape in most of the interior of the substrate apart from the spike.
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