Discussion of the operating principle of a thin film coating thickness gauge
Introduction: Optical Coating Technology: For transparent materials, under certain conditions, the transmittance and measured thickness are one-to-one correspondence. The purpose of measuring material thickness is achieved by measuring the optical transmittance (optical density) of the material. This measurement technology is now very mature and often used in the winding coating industry to detect the thickness of various films such as aluminum films and packaging films. It is not only a thin film, but also a thin film that can transmit light. As long as it is a material that can transmit light, the quality of the product can be monitored by monitoring the transmittance through a precision spectrum measurement and control thin film coating online thickness measurement system. The testing points of this precision spectrum measurement and control thin film coating online thickness measurement system can be customized.
Precision spectrum measurement and control thin film coating thickness gauge is a near-infrared photoelectric analysis instrument that uses fixed near-infrared wavelengths to test the moisture content of different products. It is an integrated instrument, and all necessary components for continuous monitoring are placed inside the instrument. According to the different wavelengths, two components can be tested simultaneously (such as the coating thickness of water-based adhesive and oil-based adhesive).
Working principle of precision spectrum measurement and control thin film coating thickness gauge
The O-H bonds of water molecules absorb near-infrared radiation at several specific wavelengths. The three filters on the rotating filter disc of the precision spectrum measurement and control tester generate these absorption and non absorption wavelengths, which are alternately reflected from the product surface to the internal optical components. The electronic pulses converted from the optical signal are calculated using a ratio algorithm to obtain a proportional water content, which is then corrected by bias and span to become a direct water content. The specially designed filter reflection signal algorithm eliminates deviations caused by optical component aging and different material reflection characteristics.
The precision spectrum measurement and control thin film coating thickness gauge has the advantages of high measurement accuracy, convenient operation, and fast measurement speed. Its automatic detection system can significantly improve the quality and production efficiency of coated products. The automated measurement process saves the measurement results in the form of data, which is conducive to product quality control, optimizing coated product parameters, reducing waste, and saving production costs. It is an essential online testing instrument for manufacturers.
