Spectral confocal thickness measurement without refractive index
When measuring ultra-thin glass, conventional contact methods such as vernier calipers and micrometers can no longer meet the measurement requirements, and the products are easily damaged. 20-30 micron glass is basically unrealistic by manual contact measurement. Only non-contact optical measurement can be used, which can reduce the secondary damage of the measuring tool to the product. Nowadays, confocal spectroscopy technology is used to measure the thickness of thin glass. Conventional spectral confocal technology to measure transparent body needs to predict the refractive index coefficient of the material to actually measure the thickness. In the measurement, the same thickness is different. For a material, the refractive index is biased, and there is a constant refractive index that affects the measured value.
The exclusive technology of THIJNKFOCUS can directly measure the thickness of thin glass without adding the refractive index.
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