Characterizing the surface of a material or product is important in some industries because roughness control offers the opportunity for further optimization. It is necessary to measure roughness, eg in medical technology, the automotive industry, electronics and semiconductors. It is also necessary to determine the roughness in construction, such as glass or wood, concrete or plaster. Currently, there are a number of conventional 3D measuring systems, which for the most part perform contact profile measurements. However, contact measurement may damage the material being measured or may not be able to provide correct data for some types of materials or surfaces. Among other things, the operation of these devices is difficult and very time consuming, and therefore expensive. The article presents non-contact roughness measurement on selected building materials using a Lext OLS3000 confocal scanning microscope. Measurements on this unique device can be performed in real time, the measurement is fully automatic, the resolution is in nanometers. Said microscope provides the possibility to measure the roughness in two ways. The article describes and compares two measurement methods. The accuracy of the measurement and the factors that affect the measurement itself are also described.
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