Nowadays, with the rapid development of industry, electronic consumer products are increasingly popular, in the electronics industry, quality and precision are the core elements that constitute the concept of intelligent manufacturing. As a mobile phone screen glass phone manufacturers also put forward higher requirements for mobile phone cover glass in terms of improving quality, reducing costs, improving yield, etc., so it is necessary to ensure the technical realization of precision measurement.

Some traditional precision measurement methods not only can not meet the needs of enterprises for batch rapid production, but also can not ensure the stability and accuracy of the test results, and the mobile phone glass cover plate in the processing process needs to be opened, CNC, polishing, ultrasonic cleaning, vacuum coating, tempering, screen printing and a series of special processing, each process may produce corresponding defects.

In order to solve the problem of on-line precision measurement of mobile phone glass cover plate, spectral confocal displacement sensor has obvious advantages such as fast speed, high precision and strong adaptability.

In the popularity of 3D glass mobile phones today, 3D glass processing has higher requirements for the process, and it requires the corresponding detection means, which need to measure the arc and arc height parameters of 3D glass.

Since the bending Angle of the 3D glass edge is very large, the measurable Angle of the sensor is required to reach the corresponding range in order to achieve fast and high-precision detection. The D82 probe has the world's largest mirror measuring Angle of ±60°, making it ideal for 3D glass measurement.

Spectral confocal displacement detection technology is used to measure distance by the wavelength information of light. A wide spectrum of polychromatic light (white) is emitted from the light source, and spectral dispersion occurs through the dispersion lens to form monochromatic light of different wavelengths. The focus of each wavelength corresponds to a distance value. The measured light is reflected back to the surface of the object, and only the monochromatic light that meets the confocal condition can be sensed by the spectrometer through the small hole. The distance value is obtained by calculating the wavelength of the sensed focus.

In the glass detection, the spectral confocal displacement sensor can carry out precise measurement. In the process of measuring repeated dynamic accuracy, the vibration interference is generated by tapping the table table first. Under such conditions, the spectral confocal displacement sensor can control the fluctuation of the detection value within 2 microns. When the glass is moved repeatedly on the slide to measure its repetition accuracy, the thickness fluctuates within an extremely small range and eventually stabilizes, with measurement accuracy up to 1 micron.

The sensor head equipped with the spectral confocal displacement sensor has good Angle characteristics, which can achieve the measurement Angle of the mirror surface of ±62°, the maximum measurement Angle of the diffuse reflection surface can reach ±88°, and multiple peaks of the multi-layer glass can be measured within the range, so as to obtain the thickness of the first piece of glass, the thickness of the second piece of glass, and the gap between the two pieces of glass. The measurement speed of the spectral confocal displacement sensor can reach 6.3k/s, in order to meet the requirements of ultra-high speed measurement occasions.

With the application of a large number of automated intelligent technology everywhere, automation equipment will undoubtedly be the core of the future production of mobile phone glass cover plate and the development of the manufacturing industrial system, and more automatic intelligent testing equipment will also help mobile phone 3C products to develop in the direction of higher quality, more efficient and energy-saving, more environmentally friendly, more advanced and low-cost.