Spectral confocal displacement sensors are widely used in various fields. One useful application is to measure film thickness. The sensor is well suited for this application, as it can make high-precision measurements at very close distances to the surface. This paper will introduce how spectral confocal displacement sensors are used to measure thin film thickness, including measurement methods, measurement principles and market applications.

Spectral confocal displacement sensor is the use of optical axis and the surface of the object is not the light of the optical axis and the surface of the object a beam of white light (or multi-wavelength mixed light) through a small hole, through the lens to focus different wavelengths of light on the surface of the optical axis, in a dispersed shape to form a rainbow distribution belt, irradiate the sample, and part of the reflected light on the surface is reflected back. In short, it is to focus on the target object using spectral dispersion, and then calculate the distance between the target object and the sensor by receiving the reflected signal.

Spectral confocal displacement sensors are widely used in film thickness measurement. In order to facilitate understanding, a science and technology Xiaobian gives you a few common scenes for everyone to understand:

1, optical film

Optical films are often used to manufacture optical devices, such as lenses, mirrors, etc. In this case, the thin thickness of the optical film has a great impact on the performance of the optical device. The spectral confocal displacement sensor can be used to measure the thickness of optical thin films very accurately, thus ensuring the performance of optical devices.

2. Electronic film

Electronic film is usually used to manufacture semiconductor devices, such as transistors, integrated circuits, etc. In this case, the thin thickness of electronic film also has a great impact on the performance of semiconductor devices. Spectral confocal displacement sensors can measure the thickness of electronic thin films very accurately, thus guaranteeing the performance of semiconductor devices.

3, coating thickness

Coating thickness refers to the thin film applied on the surface of the substrate. Such coatings are often used to improve the physical or chemical properties of the substrate. Such as gold plating, silver plating, electroplating, etc. The spectral confocal displacement sensor can help us detect the thickness of the coating, so as to ensure the performance of the coating is guaranteed.

4. Medical devices

In the manufacturing of medical devices, there are many films that need to be used, such as various probes, sensors, wires and so on. The thickness of these films can be detected using spectral confocal displacement sensors to ensure the performance and quality of medical devices.

The principle of measuring thin film thickness with confocal displacement sensor is very simple and widely used. We can use different measurement methods and choose the one that works best for us. In practical applications, it is necessary to pay attention to operation specifications to ensure the accuracy and stability of measurement data.