公开(公告)号：US20210157038A1

公开(公告)日：2021-05-27

申请号：US17104154

申请日：2020-11-25

Applicant: CORNING INCORPORATED

Inventor： Ryan Claude Andrews ,  Pierre Michel Bouzi ,  Zhenhua Guo ,  Jacob Immerman ,  Jeremiah Robert Jacobson ,  Michael David Moon ,  Babak Robert Raj ,  Nathaniel David Wetmore ,  Xiupu Wang

IPC: G02B5/04 ,  G01N21/41 ,  G01L1/24 ,  G02B6/14

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 prism-coupling system has a light source configured to generate sequential measurement light beams or reflected light beams having different measurement wavelengths. The different measurement wavelengths generate different TM and TE mode spectra. The light source can include multiple light-emitting elements and optical filters or a broadband light source and optical filters. The optical filters can be sequentially inserted into either the input optical path or the output optical path of the prism-coupling system.