To improve the quality of Chinese manufacturing, it is necessary to improve the measurement accuracy, and the manufacturing of high-end equipment requires precision measuring instruments. However, the core technology of precision measuring instruments has been held in the hands of foreigners for a long time, and in the changing international situation, there is no doubt that China's manufacturing industry needs to master independent precision measuring instruments to break the dilemma of being "stuck" by foreign countries.

Mixed light is made up of many different wavelengths of light, which we call a spectrum. All the different wavelengths of visible light overlap to form white light. The wavelength of visible light with the human eye ranges from 400nm(blue) to 700nm(red). Through a lens, different colors of light are not focused on the same point. This phenomenon is called chromatic lens error or chromatic lens deviation.

How does the spectral confocal sensor measure the glue height? At present, when the mobile phone center plate and screen module are fitted, it is necessary to point a circle of transparent UV glue on the center plate.

With the development of confocal spectroscopy technology, we can see the measurement of almost all types of materials, flatness, camboid, height difference, grooves, etc., applied to 2.5D/3D curved glass and other mobile phone 3C industry. 光谱共焦测量方法恰恰利用这种物理现象的特点。光谱共焦测量技术通过分析不同波长的光在特定表面的聚焦位置以进行高精度的尺寸测量和微观形貌分析。根据这一测量原理，特定波长的光可能聚焦在样品正面，而对于透明材质样品，两条不同波长的光在样品的正反面聚焦。这正是光谱共焦提供的两种测量模式，前者为位移测量模式，后者为厚度测量模式。今天我们与立仪科技公司一起来看看光谱共焦测量的方法：

In recent years, with the continuous upgrading of 3C product appearance design and material process, the automatic measurement of 3C product processing and manufacturing process is increasingly using spectral confocal displacement sensors.

The color laser displacement sensor is one of the displacement sensors, which is suitable for long-distance detection, and gradually replaces the pull wire displacement sensor, which is used in industrial automation, transportation, steel, construction, wharf and other applications that need automatic distance displacement measurement and position control.