How does the thin film coating online thickness gauge work?
The Precision Spectrum Measurement and Control Thin Film Coating Online Thickness Gauge is an online thickness measurement instrument that uses the principle of optical coating technology to detect material thickness. Precision measurement and control thin film online thickness gauges are often used to detect the thickness of materials in batches on production lines. During the thickness measurement process, the measurement results will be displayed to technicians or the control system in real time, so that the technicians or the control system can make timely adjustments. Responding to abnormal data is an important link in automated production. Nowadays, due to the rapid development of science and technology, online thickness gauges for thin film coatings have become an indispensable tool for batch testing of material thickness on production lines.
Nowadays, due to the rapid development of science and technology, the field of machine vision has been rapidly developed and applied. In the field of thin film thickness measurement, online thickness gauges for thin film coatings have also been rapidly developed. Nowadays, with the continuous development of science and technology, thickness measurement The types and technical features of the gauges have also been improved a lot. In the application process of the thickness gauge, different types of thickness gauges are combined, and the uses are also very different. Now take the thin film coating thickness gauge from Wuxi Jingpu Measurement and Control For example, the precision spectrum measurement and control coating (film thickness) online thickness gauge uses nano-optical interference to measure 20 layers of unused coatings and films at the same time, with an accuracy of up to 1nm, which perfectly solves the problem of traditional radiation-based coatings. Online thickness gauges have the disadvantages of radiation, long offset period, low detection accuracy, and inability to detect coating thickness. The precise measurement and control coating thickness online thickness gauge has high detection accuracy and can be automatically calibrated online in real time, effectively ensuring the detection accuracy of the online thickness gauge.
Nowadays, our company's [Thin Film Coating Online Thickness Gauge] has also been widely used! This system can accurately detect whether the glue thickness exceeds the standard and is uniform, reducing the waste of unqualified products, improving product quality, reducing the consumption of raw materials, and greatly improving production efficiency and increasing output. And it avoids the sampling and testing of semi-finished products. And the measurement data of the system can be viewed at any time through a mobile phone or computer.
Detection principle of thin film coating online thickness gauge:
When light of a specific wavelength passes through different materials (different thickness, density, composition), the spectral fringes formed after multiple reflections on the surface and inside are completely different. The system analyzes the spectrum of the reflected light received. The interference fringe characteristics are matched and compared with the spectral curves in the system library, and the characteristic curves are simulated and fitted, and then the coatings with different composition thicknesses are measured online.
(1) The incident light is reflected multiple times on the upper and lower surfaces of the film.
(2) The intensity of reflected light is related to the refractive index of the film, the refractive index of the substrate, the film thickness, and the wavelength.
(3) When the refractive index is known, the film thickness is calculated based on the measured reflected light intensity and wavelength.
