PREDNASAJUCI / LECTURER : Ján Rybák (1) Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica NAZOV / TITLE : The CoMP-S instrument of the Lomnický Štít Observatory: polarimetric calibration ABSTRAKT / ABSTRACT : The lecture will report on the polarimetric calibration of the CoMP-S instrument used at the Lomnicky Stit Observatory for spectropolarimetric observations of the solar prominences and the emission corona. Results of different tests performed and instrumental developments introduced to the instrument will be presented. Based on these results, a new, improved polarimetric package will be described.