Abstract
In the paper, non-contact air gauge combined with a slider was proposed for the wooden surface roughness assessment. It was able to eliminate the influence of the asperities of higher order (waviness) and to protect the wooden surface from being damaged with the measuring nozzle. The series of the measurements were performed, and the results were compared to the results obtained from Perthen S8P profilometer and WYKO NT 1100 interferometer microscope. The analysis confirmed that larger diameters of the nozzles gave worse results, especially in case of the sharp peaks of asperities. Moreover, it revealed that higher back-pressure provided better results of measurement. In spite of certain limitations in surface characteristics measurement, the air gauges proved to be a good non-contact tool for wooden surface, much cheaper than the laser profilometers.
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