Actual Problems in Machine Building 2017 Vol. 4 No. 1

Actual Problems in Machine Building. Vol. 4. N 1. 2017 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 34 15. Filippova E.O., Filippov A.V., Shulepov I.A. Experimental study of sliding friction for PET track membranes // IOP Conference Series: Materials Science and Engineering. – 2016. – Vol. 125. POSSIBILITY OF CONFOCAL MICROSCOPY WHEN ASSESSING MICROGEOMETRY OF SURFACE Alfyorova E.A. , Ph.D. (Physics and Mathematics), Associate Professor, e-mail: katerina525@mail.ru Jiang Dilong , Master’s Degree student, e-mail: 408912814@qq.com National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation Abstract Today in the world there is no single standard approach to evaluating the surface roughness. On the one hand, we have too much parameters, and on the other, they are not always sufficient for describing and evaluating the surfaces with special properties. Today, however, many new measurement tools and methods appear. All this leads to the question of the comparability of the results obtained in different ways. The paper compares the results of the measurement of two- dimensional roughness parameter Ra (arithmetic mean deviation of the assessed profile) and its three-dimensional analogue of Sa (arithmetical mean height of the scale limited surface), obtained by confocal microscopy with the value indicated on the samples roughness. We have demonstrated that the characteristics of the lens affect to the obtained result. The causes of results mismatch are considered and recommendations on the choice of the lens zoom offers. The possibility of using confocal microscopy in the technical measurements and scientific research are discussed. Keywords confocal microscopy, two-dimensional and three-dimensional roughness parameters Funding The reported study was funded by RFBR, according to the research project No. 16-32-60007 mol_а_dk