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The accuracy of measurement is determined by measurement errors and uncertainty from the received result caused by accidental impact of various factors. When assessing the uncertainty of contact measurement methods can be used standard procedures, which are missing in non-contact measurements. In this article the determination of the expanded uncertainty at a specific practical case is made in the terms of non-contact measuring of a cylindrical workpiece made of aluminium, which is finely machined. Following the evaluation of the defined input factors first iteration assessment of the expanded uncertainty is made. As a result it was determined that the approximate uncertainty of measurement after the first iteration is greater than target uncertainty. After correction of input variables with the greatest impact the result of the second iteration is satisfying.

Analysis of the factors affecting uncertainty in measuring the geometry of details through photogrammetric method