TY - JOUR N2 - This work is focused on the issue of non-measured points – one of the most important problems in surface texture measurements using optical methods. The fundamental aim of this research is to analyse errors of surface texture measurements caused by the presence of non-measured points. This study is divided into two parts. In the first part, circles with non-measured points were artificially created on peak portions of measured surfaces. In the second part – the results of measurement by a Talysurf CCI Lite interferometer were analysed. A measurement area of 3.3 × 3.3 mm contained 1024 × 1024 points. The measurements were performed with different intensity of light. Changes of parameters regarding the analysed errors depended on a surface type. The following parameters are susceptible to errors: skewness Ssk, areal material ratio Smr, as well as the following feature parameters: Spd, Sda, Sdv, Sha and Shv. Inaccuracies of measurement in valley parts of two-process textures led usually to larger errors of parameter computations compared with deviations in peak portions. L1 - http://www.journals.pan.pl/Content/106317/PDF/10.1515-2017-0046%20paper%2007.pdf L2 - http://www.journals.pan.pl/Content/106317 PY - 2017 IS - No 3 EP - 525–536 DO - 10.1515/mms-2017-0046 KW - surface texture measurements KW - optical method KW - non-measured points KW - white light interferometer A1 - Pawlus, Paweł A1 - Reizer, Rafał A1 - Wieczorowski, Michał PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 24 DA - 2017.09.30 T1 - Problem of Non-Measured Points in Surface Texture Measurements SP - 525–536 UR - http://www.journals.pan.pl/dlibra/publication/edition/106317 T2 - Metrology and Measurement Systems ER -