A spectral confocal displacement sensor is used to measure the thickness of the gap between multiple layers of transparent glass.
I. Introduction. In areas such as electronic components, consumer electronics, and chip manufacturing, accurate measurement of material thickness and clearance is essential. As a high-precision measurement device, spectral confocal displacement sensors are widely used in displacement measurement and thickness measurement of various materials. In this article, we will show how to measure the thickness of the gap between multiple layers of transparent glass using a spectral confocal displacement sensor.
Second, the principle overview.
Spectral confocal sensor is a sensor that uses polychromatic light as the light source, and its measurement accuracy can reach the micron level, which can be used to measure the measured object of diffuse reflection or mirror reflection. In addition, the spectral confocal displacement sensor can also perform unidirectional thickness measurement of transparent objects, and the light source and receiving mirror are coaxial, which effectively avoids the occlusion of the optical path and makes the sensor suitable for measuring diameter4The internal structure of holes and grooves of 5 mm or more.
When measuring the displacement of a transparent object, the displacement signal received by the sensor is calculated from the upper surface because the upper and lower surfaces of the measured object are reflected, which will cause a certain error. However, it is precisely based on this unique principle that enables the spectral confocal displacement sensor to measure the displacement with high accuracy, whether it is a single layer of transparent objects or multi-layer transparent objects, in addition to the displacement of the object, it can also measure its thickness.
When measuring the thickness of the gap between multiple layers of transparent glass, the spectral confocal displacement sensor is able to measure the thickness of the glass through the glass, and it can also measure the thickness of the gap. This is due to the fact that it uses a special measuring principle that distinguishes between reflected light from glass surfaces and gaps.
3. Experimental process.
Prepare experimental materials: multi-layer transparent glass, spectral confocal displacement sensor, holder, light source, etc.
Place multiple layers of clear glass on the bracket to ensure that a certain gap is formed between the glasses.
Place the spectral confocal displacement sensor above the bracket and adjust the distance between the sensor and the glass surface so that the light can be directed perpendicularly to the glass surface.
Turn on the light source, emit polychromatic light, and receive the reflected light through the spectral confocal displacement sensor.
The offset of the reflected light is recorded, and the thickness of the gap between the multiple layers of transparent glass is calculated.
Fourth, the results of the analysis.
The experimental results show that the spectral confocal displacement sensor is used to measure the gap thickness between multiple layers of transparent glass with high precision and high stability. The experimental error is in the micron range or even below micron, which meets the requirements of high-precision measurement. At the same time, this method can be adapted to different materials and different measurement environments, and has a wide range of application prospects.
V. Conclusions and prospects.
Through the experimental study in this paper, we have demonstrated the feasibility and superiority of using a spectral confocal displacement sensor to measure the gap thickness between multiple layers of transparent glass. This method has the characteristics of high precision and high stability, and is suitable for various materials and different measurement environments. In the future, we will apply this method to a wider range of fields, providing more accurate measurement methods for materials science, electronic components and chip manufacturing. At the same time, we will continue to research new measurement methods and technologies, continuously improve the accuracy and efficiency of measurement, and make greater contributions to the development of related fields.