Abstract: The invention provides a glass surface stress meter and multiple-tempered glass surface stress meter, and the glass surface stress meter includes a light source (810, 910), a light refraction element (820, 920) and an imaging unit. The light refraction element (820, 920) is provided at a light-emitting direction of the light source (810, 910) for placing a measured glass (970). The light from the light source (810, 910) comes into the imaging unit to imaging after refracted by the light refractive element (820, 920). The imaging unit includes lens group (830, 940) and a imaging sensor (840, 960). A front end of the lens group is provided at the light-refraction direction of the light refraction element (820, 920) and a back-end is provided with the imaging sensor.

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.

Abstract: The invention provides a glass surface stress meter and multiple-tempered glass surface stress meter, and the glass surface stress meter includes a light source (810, 910), a light refraction element (820, 920) and an imaging unit. The light refraction element (820, 920) is provided at a light-emitting direction of the light source (810, 910) for placing a measured glass (970). The light from the light source (810, 910) comes into the imaging unit to imaging after refracted by the light refractive element (820, 920). The imaging unit includes lens group (830, 940) and a imaging sensor (840, 960). A front end of the lens group is provided at the light-refraction direction of the light refraction element (820, 920) and a back-end is provided with the imaging sensor.