Accuracy improvement by mathematical correction method and electro-optical device certification

This paper is devoted to the analysis of methodical error induced by the curvature of spiral of Archimedes used in some electro-optical measuring devices for point source image coordinate determination. Methods of mathematical processing of the measurement results (corrections) based on definition of device parameters depending both on design characteristics and instrumental errors are described. The measurement results verifying considerable accuracy enhancement owing to mathematical correction methods implementation are presented.