Corning Incorporated

Nathaniel David Wetmore

William John Furnas

Ryan Claude Andrews

Pierre Michel Bouzi

Jeremiah Robert Jacobson

Evan Lewis Olson

Rostislav Vatchev Roussev

Jacob Immerman

Katherine Anne Lindberg

Glenn Abram Newcomer

Viktor Stepanov

Dana Craig Bookbinder

Govindarajan Natarajan

Natesan Venkataraman

Vitor Marino Schneider

James Andrew West

Robert Stephen Wagner

Babak Robert Raj

David Matthew Berg

Steven S Rosenblum

Craig Llewellyn Barnes

Methods and apparatus for obtaining a corrected digital mode spectrum for a chemically strengthened (CS) substrate having a curved surface are disclosed. The methods include digitally capturing transverse magnetic (TM) and transverse electric (TE) mode spectra of the CS substrate to form a digital mode spectrum image using an evanescent prism coupling system having a system calibration for measuring flat CS substrates. The method further includes establishing a calibration correction based on the difference in the digitally captured TM and TE mode spectra as compared to a reference TM and TE mode spectra for a reference CS substrate. The calibration correction is applied to the digital mode spectrum image to form the corrected digital mode spectrum image, which can be processed using the system calibration for measuring flat CS substrates to determine a refractive index profile and stress characteristics for the curved CS substrate.

Enhanced evanescent prism coupling systems and methods for characterizing stress in chemically strengthened curved parts

A prism coupling system configured to determine at least one stress characteristic in a chemically strengthened substrate having a surface and a near-surface waveguide has a a light source system that generates measurement light. A coupling prism provides optical coupling of the measurement light into and out of the near-surface waveguide over an optical path that comprises a low-angle region and a high-angle region. A detector system arranged to receive the measurement light from the coupling prism to detect a mode spectrum image. A light-blocking member is operably disposed to at least partially extend into the low-angle region without extending into the high-angle region to increase or optimize the contrast of the mode spectrum image.

Prism coupling systems and methods employing light-blocking members

Systems and methods of performing a stress measurement of a chemically strengthened glass using a light-scattering polarimetry system include adjusting the intensity of a light beam from a light source in an illumination system using a rotatable half-wave plate and a first polarizer operably disposed between the light source and a rotating light diffuser that has a rotation time t. The first polarizer is aligned with a second polarizer in a downstream optical compensator to have matching polarization directions by rotating the rotatable half-wave plate to a position where the exposure time tfalls within an exposure range t≤t. The method also includes performing an exposure using the exposure time tto obtain the stress measurement. One or both of the half-wave plate and first polarizer can be tilted to avoid deleterious back-reflected light from entering the light source.

Light source intensity control systems and methods for improved light scattering polarimetry measurements

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 system 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 and enhanced configurations of the EPCS and LPS sub-systems to improve measurement accuracy are also disclosed.

Enhanced hybrid systems and methods for characterizing stress in chemically strengthened transparent substrates

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.

Hybrid systems and methods for characterizing stress in chemically strengthened transparent substrates

Disclosed herein are light guide plates (&#x2033;) comprising a transparent substrate () having an edge surface (), a light emitting first major surface (), and an opposing second major surface (); and a polymeric film () disposed on at least one of the first () and second () major surfaces of the transparent substrate, wherein the polymeric film () comprises a plurality of microstructures () and/or a plurality of light extraction features. At least one light source () may be coupled to the edge surface () of the transparent substrate (). Display and lighting devices comprising such light guide plates are further disclosed, as well as methods for manufacturing such light guide plates.

Microstructured and patterned light guide plates and devices comprising the same

A contoured glass sheet laminating system may include a glass-side vacuum bed, a laminate-side vacuum bed and a lamination actuator. The glass-side vacuum bed may include a vacuum backside and a mold-receiving side and may have sufficient permeability to permit a vacuum system to pull a vacuum across a thickness of the glass-side vacuum bed between the vacuum backside and the mold-receiving side of the glass-side vacuum bed. The laminate-side vacuum bed may include a vacuum backside and a thin-film loading side and may have sufficient permeability to permit a vacuum system to pull a vacuum across a thickness of the laminate-side vacuum bed between the vacuum backside and the thin-film loading side of the of the laminate-side vacuum bed.

Glass sheet laminating system

Growing community of inventors

Corning, NY, United States of America

Nathaniel David Wetmore