A Raman spectrometer and measurement method for measuring the surface stress of tempered glass

Abstract

The present invention relates to a Raman spectrometer for measuring a tempered glass surface stress and a measurement method of a tempered glass surface stress. The Raman spectrometer comprises a light source, a Raman signal collection device and a Raman spectrum analysis device. The Raman spectrum analysis device includes a half transparent and half reflecting mirror, a micro-lens array, a focusing lens, an imaging optical fiber bundle, a microscopic system and a displacement scanning control mechanism which are arranged in order along with an optical path; and a sample to be measured is located on the displacement scanning control mechanism at the back end of the microscopic system, and the microscopic system is configured to focus the light emitted by the light source on the sample to be measured to generate Raman signals. The Raman spectrum analysis device includes an imaging lens, an emission slit and a spectrometer which are arranged in order at the back end of the half transparent and half reflecting mirror, and the Raman signals scattered by the sample to be measured pass through the imaging lens and the emission slit to enter the spectrometer for performing spectral analysis after being reflected by the half transparent and half reflecting mirror. The measurement method of a tempered glass surface stress provided by the invention is simple in measurement process and high in measurement precision; and moreover, the Raman spectrometer for measuring a tempered glass surface stress and the measurement method of the tempered glass surface stress have wide application prospects.

Description

technical field [0001] The invention belongs to the field of stress detection of tempered glass, in particular to a Raman spectrometer and a measurement method for measuring the surface stress of tempered glass. Background technique [0002] Tempered glass, also known as strengthened glass, is a kind of prestressed glass, which usually uses chemical or physical methods to form compressive stress on the surface of the glass. When the glass is subjected to external force, it first offsets the surface pressure, thereby improving the bearing capacity, so tempered glass is widely used. Used in building doors and windows, glass curtain walls, electronic instruments and other fields. However, there will be a large number of micro-cracks on the edge of tempered glass after cutting, which will reduce the strength of the glass. Especially with the vigorous development of the touch industry, the specification requirements of the touch products themselves are becoming increasingly stri...

AI Technical Summary

Problems solved by technology

Although the surface stress of tempered glass can be calculated accurately and efficiently by using the new automatic glass surface stress meter, since the glass to be tested needs to be placed on the surface of the birefringent prism in contact with it for total reflection to occur during measurement, the contact process is extremely difficult. It is easy to cause scratches to the glass to be tested, which affects the appearance and performance of the glass to be tested

In addition, in order to improve the measurement accuracy of the strain gauge, refraction liquid needs to be added to the surface of the glass to be tested during the measurement process, and the surface of the glass to be tested needs to be wiped after the measurement, which increases the complexity of the entire measurement process, is time-consuming and laborious, and affects measurement efficiency

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