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Measuring principle of glass surface stress meter

  • Source: Unknown
  • Date: April 1, 2021
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Glass surface stress meter The principle of the measurement is to use the optical waveguide effect of the ion exchange layer on the glass surface for measurement. The diverging light from the light source passes through the slit, converges by the high refractive index cylindrical prism and becomes a parallel light. By adjusting the position of the light source, a beam of parallel light can be incident to the interface between the glass and the prism at a critical angle. Due to the stress on the glass surface, the light is decomposed into vector light with two vibration surfaces perpendicular to each other, These two beams of light propagate at different speeds in the ion exchange layer of the glass, so they are refracted to the prism at different total reflection angles. The light emitted from the prism is reflected by the reflector into the interference filter, focused by the telescope system, and then imaged on the reticle after passing through the analyzer to form a light and dark step image. The analysis software can accurately measure the height of steps and the number of step lines to calculate the surface stress intensity and the depth of stress layer.
       
The tempered glass stress meter FSM-6000LE ORIHARA, formerly made by Toshiba Glass Research Institute in Japan, was purchased, improved and manufactured by ORIHARA in Japan. It is a surface stress detector for tempered glass. The automatic measurement error of the tempered glass stress meter FSM-6000LE is small. It is widely used in chemical flat glass manufacturers and touch panel manufacturers, such as LCD screen manufacturers. Tempered glass stress meter, FSM-6000LE glass surface stress meter is used to measure the surface stress of chemically strengthened and physically strengthened glass. The stress on the surface and the depth of the stress layer can be measured according to the photoelastic technology by allowing light to propagate along the glass surface. This machine is equipped with a computer, which can reduce the error of the measurer and facilitate the management of measurement data. The FSM-6000 glass surface stress meter is easy to use and operate. It not only shortens the time required for the measurement process, but also monitors the glass production process in a timely manner. The machine can analyze the surface stress of chemically tempered glass well, and then judge the tempering degree of the product.
 
According to the relevant provisions of the Chinese building materials industry standard JC-T 977-2005 chemical tempered glass, the product quality grade can be well compared, so the FSM-6000 glass surface stress meter is an indispensable measuring tool for the production industry of chemical tempered glass, and this technology is also an irreplaceable authority in Japan.

 
Glass surface stress meter It is an instrument used to check the size and distribution of stress in transparent objects. It is not only widely used in optical glass, optical instruments, glass products, plastic products and other industries, but also plays an important role in the inspection of safety explosion-proof indicators of building materials, lamps, pharmaceuticals, beverages, handicrafts, and also has many applications in the fields of crystal jewelry production, geology and minerals, and materials science. At the same time, the surface stress instrument provided by Dongyi Seiko is also an ideal teaching experimental equipment for colleges and universities.

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